gnuplot-info — For questions and discussion about gnuplot

[Gnuplot-info] How to draw a line on pm3d map?

[Matusevita, IĮ <mat...@gm...>]

Hello,

I would like to draw some simple lines/curves on the pm3d map. I need
to do this quickly and qualitatively.

The best what I can do is the result of this script:

# I need to generate figure with LaTeX labels
set terminal epslatex color
set output "Fig.tex"
unset origin
# So I draw a pm3d map...
set multiplot
set pm3d map
set palette negative
set size square
set xlabel "$\\gamma_1$"
set ylabel "$\\gamma_2$"
unset key
splot [-50:50][-50:50] x
# ...and then I draw one line on the pm3d map
unset pm3d
unset xlabel
unset ylabel
set size square 0.6999999999999999999
set origin 0.11345, 0.12894
set style line 1 lt 2 lc rgb "black" lw 2
plot [-50:50][-50:50] 3.42366-x ls 1
unset size
unset origin
unset multiplot

As one can see, the result is not good because it is difficult to put
the figure with line on the pm3d map accurately.

May be someone knows the better way to solve my problem?

Thank you in advance.

Aris M.

Re: [Gnuplot-info] is there more line styles?

[GPS <gpo...@gm...>]

Hi

I'm new user, but about test command I would like to add a bit information,
and I would like to take shared the script wrote by Mr. Rhubbell.

set terminal png size 2000,2000
set output "gnuplot-pngtest.png"
test
quit
If you use a big image (e.g. 2000x2000) gnuplot shows many others styles and
colors.

Good luck!
__________________________________
Guilherme Poleszuk dos Santos Rosa


2010/2/26 rhubbell <Rhu...@ih...>

> On Fri, 26 Feb 2010 12:38:11 -0600
> Jon wrote:
>
> > I would like to use dotted line, dotted-dashed line, dotted-long dashed
> > line etc, to draw graphs, is there way to do that with gnuplot? What I
> > found from the gnuplot manual that only dashed line is supported, is
> > this the case? Thank
>
> gnuplot
> set terminal
> hit enter to show terminal types available
>
> set terminal png
> set output "gnuplot-pngtest.png"
> test
> quit
>
> now use your favorite image viewer to view gnuplot-pngtest.png
>
>
> ------------------------------------------------------------------------------
> Download Intel&#174; Parallel Studio Eval
> Try the new software tools for yourself. Speed compiling, find bugs
> proactively, and fine-tune applications for parallel performance.
> See why Intel Parallel Studio got high marks during beta.
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[Gnuplot-info] Suppress Gnuplot warnings

[coleTEK <fo...@co...>]

Hi how can I suppress gnuplot warnings. Ideally I would like to suppress all
them. Or alternatively warnings such as 
Warning: empty x range [3.20252e+08:3.20252e+08], adjusting to
[3.17049e+08:3.23454e+08]
Warning: empty y range [1.01054:1.01054], adjusting to [1.00043:1.02065]
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Re: [Gnuplot-info] is there more line styles?

[rhubbell <Rhu...@iH...>]

On Fri, 26 Feb 2010 12:38:11 -0600
Jon wrote:

> I would like to use dotted line, dotted-dashed line, dotted-long dashed
> line etc, to draw graphs, is there way to do that with gnuplot? What I
> found from the gnuplot manual that only dashed line is supported, is
> this the case? Thank

gnuplot
set terminal
hit enter to show terminal types available

set terminal png
set output "gnuplot-pngtest.png"
test
quit

now use your favorite image viewer to view gnuplot-pngtest.png

Re: [Gnuplot-info] is there more line styles?

[Hans-Bernhard B. <HBB...@t-...>]

Jon wrote:
> I would like to use dotted line, dotted-dashed line, dotted-long dashed line
> etc, to draw graphs, is there way to do that with gnuplot? What I found from
> the gnuplot manual that only dashed line is supported, is this the case?

Strange.  Care telling where in the gnuplot manual you read that?

That said, 'dashed' does actually mean "patterned", and that usually 
does include some dottet, dot-dashed and other patterned lines.  It all 
depends on the terminal driver though.

[Gnuplot-info] any more gray scale?

[Jon <dev...@gm...>]

I want to draw all my graphs in gray scale, is there way to specify this?
What I can find is dark and one scale of gray. Thanks,

[Gnuplot-info] is there more line styles?

[Jon <dev...@gm...>]

I would like to use dotted line, dotted-dashed line, dotted-long dashed line
etc, to draw graphs, is there way to do that with gnuplot? What I found from
the gnuplot manual that only dashed line is supported, is this the case?
Thanks,

Re: [Gnuplot-info] missing text object

[Hans-Bernhard B. <HBB...@t-...>]

dsw...@on... wrote:

> I want comment out my data sets in the plot, drawing an arrow and
> labeling it with text e.g. with "missing data" for a gap in
> timeseries. There are serveral objects for plotting arrows, lines etc.,
> but I can't find a object for drawing text elements in a plot?! How can
> I put text in the plot?

See "help label".

[Gnuplot-info] missing text object

[<dsw...@on...>]

Hi!
I am a new user of gnuplot. I use gnuplot for plotting my measurement
data. This works very well.
I want comment out my data sets in the plot, drawing an arrow and
labeling it with text e.g. with "missing data" for a gap in
timeseries. There are serveral objects for plotting arrows, lines etc.,
but I can't find a object for drawing text elements in a plot?! How can
I put text in the plot?

Many thanks,
Dietrich

Re: [Gnuplot-info] Trying to create audiogram chart with gnuplot - need help including custom symbols

[Thomas S. <t.s...@fz...>]

for those bracket like symbols you could combine a box and a white line
overwriting one box side:

datafile.dat:
200 47 47
500 71 64 19
1000 87 78 38
2000 100 100 55
4000 93 101 55

plot script:
reset
mx(a,b)=10**((log10(b)-log10(a))*0.5+log10(a))
set xrange [125:8000]
set logscale x
set xtics ( "125"  125, "" mx( 125, 250), \
            "250"  250, "" mx( 250, 500), \
            "500"  500, "" mx( 500,1000), \
           "1000" 1000, "" mx(1000,2000), \
           "2000" 2000, "" mx(2000,4000), \
           "4000" 4000, "" mx(4000,8000), \
           "8000" 8000)
set grid
set yrange [-10:130] reverse
set ytics 0,10,120

unset bars
set linestyle 10 linecolor rgb 'white' pointtype -1
xdel=0.06
ydel=3.0

plot \
'datafile.dat' using 1:2 with linespoints pointtype 2 pointsize 3, \
'' using 1:3 with linespoints pointtype 6 pointsize 3, \
'' using 1:4:(10**(log10($1)-xdel)):(10**(log10($1)+xdel)):4:($4+ydel) with
boxxyerrorbars, \
'' using 1:($4+ydel):(10**(log10($1)-xdel)):(10**(log10($1)+xdel)) with
xerrorbars linestyle 10


t putkonen wrote:
> 
> Audiograms are used in hearing tests, and they look something like the
> following:
> 
> http://www.mydr.com.au/files/images/categories/hearing/audiogrammixedv2.jpg
> 
> I've tried to create an audiogram using gnuplot, but I ran into problems.
> It
> was very easy to do the following tasks:
> 
> - set tics for x and y
> - set x scale as logarithmic
> - draw grid
> - draw lines
> 
> However, I couldn't figure out how to include custom symbols to the chart.
> The example picture shows some of the symbols that can be used. Also othe
> symbols exist.
> 
> I created the symbols and stored them to PNG files, but when I used plot
> command with the images I found several issues:
> 
> - Image is plotted so, that it's left upper corner is in the given
> coordinates. Instead, the image's center point should be in the given
> coordinates.
> - Plotting images don't work with logarithmic scale (which makes sense
> since
> they are plotted utilizing the chart's coordinates, but it isn't feasible
> in
> this case)
> - PNG transparency doesn't seem to work
> 
> What I would like to do is tell gnuplot to plot my image to specific
> coordinates so that I give center point of the image and size of the
> plotted
> image in pixels (x & y). If this is not possible can I somehow achieve
> similar result?
> 
> I could even superimpose the symbols to a bitmap plot using e.g.
> Imagemagick
> if there was a way to find out the correct position (for example, x and y
> pixel locations of 70 dB & 1000 Hz).
> ------------------------------------------------------------------------------
> Download Intel® Parallel Studio Eval
> Try the new software tools for yourself. Speed compiling, find bugs
> proactively, and fine-tune applications for parallel performance.
> See why Intel Parallel Studio got high marks during beta.
> http://p.sf.net/sfu/intel-sw-dev
> _______________________________________________
> gnuplot-info mailing list
> gnu...@li...
> https://lists.sourceforge.net/lists/listinfo/gnuplot-info
> 
> 

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Re: [Gnuplot-info] Fit trouble when I use xdata time (fit isn't so good)

[GPS <gpo...@gm...>]

Hi Mr. Hans-Bernhard!

Your explanation is very interesting and it should be appear in the next
edition of "Gnuplot in action" book as well the explaning that Mr. Thomas
posted about this issue. Those tips explained what was my problem.... thank
you very much!!! I'm using the Thomas' suggest but think in a scale factor
is interesting too...

As we brazilian sometimes say: "Living and learning", for today I learn a
bit more with you.

Thanks again!! Sorry my english :|
__________________________________
Guilherme Poleszuk dos Santos Rosa


2010/2/23 Hans-Bernhard Bröker <HBB...@t-...>

> Guilherme Poleszuk wrote:
>
> I believe that are a problem with "fit" function when I use xdata time,
>> because X values are converted to second since 2000/01/01 ( I think! ) and
>> this number get big compared to Y values...
>>
>
> Exactly.  Fit is somewhat allergic to parameter values of wildly different
> magnitude.  The issue is not unique to time-date axes, but those do have a
> tendency to get hit by it more often than others because they tend to pick
> up big figures, like the number of seconds in a day (or a year, even), as
> factors that end up in the parameters.
>
> The solution is to shift or scale the problem to get the expected
> parameters into similar magnitude ranges.  E.g. it might help to define your
> model function to take days instead of seconds as its argument
>
>        fit f(x/86400) 'data' u 1:4 via a, b
>
> or (like Thomas suggested already), shift the zero point of your x axis.
>
> Note that the usual simple forms of the straight line equation
>
>        y = m*x + y0
>        y = m*(x -x0)
>
> may suffer from ginormous extrapolation from a very short piece of curve
> all the way to the point of x=0 (or y=0), causing parameters like x0 or y0
> to be entirely dominated by rounding error.
>
>
>

Re: [Gnuplot-info] Fit trouble when I use xdata time (fit isn't so good)

[Hans-Bernhard B. <HBB...@t-...>]

Guilherme Poleszuk wrote:

> I believe that are a problem with "fit" function when I use xdata time, 
> because X values are converted to second since 2000/01/01 ( I think! ) and 
> this number get big compared to Y values... 

Exactly.  Fit is somewhat allergic to parameter values of wildly 
different magnitude.  The issue is not unique to time-date axes, but 
those do have a tendency to get hit by it more often than others because 
they tend to pick up big figures, like the number of seconds in a day 
(or a year, even), as factors that end up in the parameters.

The solution is to shift or scale the problem to get the expected 
parameters into similar magnitude ranges.  E.g. it might help to define 
your model function to take days instead of seconds as its argument

	fit f(x/86400) 'data' u 1:4 via a, b

or (like Thomas suggested already), shift the zero point of your x axis.

Note that the usual simple forms of the straight line equation

	y = m*x + y0
	y = m*(x -x0)

may suffer from ginormous extrapolation from a very short piece of curve 
all the way to the point of x=0 (or y=0), causing parameters like x0 or 
y0 to be entirely dominated by rounding error.

Re: [Gnuplot-info] Adding "headroom" for autoscaling

[Egil K. <eg...@kv...>]

On 02/23/2010 01:00 AM, Hans-Bernhard Bröker wrote:
> Egil Kvaleberg wrote:
>
>> Setting the yrange manually to [8.0:13.0] obviously fixes this, but I
>> really would need to have autoscale to do this for me, but have found no
>> way of achieving that. Have I overlooked something?
>
> Only the "help offsets".
>
Marvelous, a "set offset 0, 0, 0.1, 0.1" fixed my problem perfectly! Thanks!

Since I had problem making the association myself, I could suggest the
following
added to "help autoscale":

    To add an additional margin between plotted data and the graph
boundary lines,
    use 'set offset'.

Or something along those lines.

Egil

Re: [Gnuplot-info] Fit trouble when I use xdata time (fit isn't so good)

[GPS <gpo...@gm...>]

Hi Mr Thomas


Thank you very much for help me. Your tip helps a lot!

Have a very nice day!
__________________________________
Guilherme Poleszuk dos Santos Rosa


2010/2/23 Thomas Sefzick <t.s...@fz...>

>
> just set the 'origin' of the fit in the middle of your time data:
>
> toffset=strptime("%Y/%m/%d %H:%M","2010/02/20 23:28")
> f(x)=a + b*(x-toffset)
> fit f(x) "watthour.txt" using 1:4 via a,b
>
> so that 'a' and 'b' are not influencing each other.
>
>
> Guilherme Poleszuk wrote:
> >
> > Hi!
> >
> > I am a new user of gnuplot and my version is 4.2 patchlevel 6. I'm having
> > a
> > trouble with "fit" function when I use xdata time as X axis values. Here
> > my
> > script and data set.
> >
> > # watthour.gnu
> > # =========== < cut here
> > reset
> > set terminal png size 800,500 font comic 12 enhanced truecolor
> > set output "watthour.png"
> > set xdata time
> > set timefmt "%Y/%m/%d %H:%M"
> > set label "Powered by GnuPlot 4.2" at graph 0.87,-1.7 center font
> > "lhandw,10"
> > textcolor rgb "#800080"
> > show label
> > set key below left vertical title "Variables"
> > set border 3
> > set xtics rotate by 45 offset graph -0.075,-0.30 textcolor rgb "#008000"
> > nomirror
> > set ytics nomirror textcolor rgb "#008000" nomirror
> > set format x "%d%b %Hh"
> > set format x "%N"
> > set format y "%6.1f"
> > set xtics 86400
> > set ytics 2
> > set mxtics 12
> > set mytics 5
> > f(x)=a + b*x
> > fit f(x) "watthour.txt" using 1:4 via a,b
> > set title "Kilowatts - 2010\n Fit Model: f(t) = a + b.t " font "comic,
> 12"
> > textcolor rgb "#800080"
> > plot f(x) t"Projection" with lines 2, "watthour.txt" using 1:4 t "KWh"
> > with
> > points 3
> > # =========== < cut here
> >
> >
> >
> > # watthour.txt
> > # =========== < cut here
> > #YYYY MM DD hh mm U  KWh
> > 2010/02/19 23:36 3 22835.1
> > 2010/02/20 08:05 3 22839.0
> > 2010/02/20 10:32 3 22839.8
> > 2010/02/20 11:32 3 22840.1
> > 2010/02/20 12:49 3 22840.8
> > 2010/02/20 23:28 3 22845.5
> > 2010/02/21 01:40 3 22846.8
> > 2010/02/21 13:45 3 22851.5
> > 2010/02/21 22:09 3 22855.6
> > 2010/02/22 18:06 3 22864.5
> > 2010/02/22 22:14 3 22866.0
> > # =========== < cut here
> >
> >
> >
> > I believe that are a problem with "fit" function when I use xdata time,
> > because X values are converted to second since 2000/01/01 ( I think! )
> and
> > this number get big compared to Y values... the algorith to "fit" the
> data
> > to
> > the model has some dificulties with this. The curve not pass near of the
> > points, of course, it not pass over them, but should be pass so near
> > because
> > it is a adjustment with "least squares"!! My data set file don't have
> > outliers
> > to cause the problem that I report here.
> >
> > I tried do some tests with this same data, changing time near year 2000
> > and
> > the fit curv was diferent, but it curve should be the same angular
> > coeficient.
> > Is it a bug or I'm commiting a mistake.
> >
> > Thank you very much!
> >
> > __________________________________
> > Guilherme Poleszuk dos Santos Rosa
> > São Paulo, Brazil
> >
> >
> >
> ------------------------------------------------------------------------------
> > Download Intel&#174; Parallel Studio Eval
> > Try the new software tools for yourself. Speed compiling, find bugs
> > proactively, and fine-tune applications for parallel performance.
> > See why Intel Parallel Studio got high marks during beta.
> > http://p.sf.net/sfu/intel-sw-dev
> > _______________________________________________
> > gnuplot-info mailing list
> > gnu...@li...
> > https://lists.sourceforge.net/lists/listinfo/gnuplot-info
> >
> >
>
> --
> View this message in context:
> http://old.nabble.com/Fit-trouble-when-I-use-xdata-time-%28fit-isn%27t-so-good%29-tp27698343p27702229.html
> Sent from the Gnuplot - User mailing list archive at Nabble.com.
>
>
>
> ------------------------------------------------------------------------------
> Download Intel&#174; Parallel Studio Eval
> Try the new software tools for yourself. Speed compiling, find bugs
> proactively, and fine-tune applications for parallel performance.
> See why Intel Parallel Studio got high marks during beta.
> http://p.sf.net/sfu/intel-sw-dev
> _______________________________________________
> gnuplot-info mailing list
> gnu...@li...
> https://lists.sourceforge.net/lists/listinfo/gnuplot-info
>

Re: [Gnuplot-info] Fit trouble when I use xdata time (fit isn't so good)

[Thomas S. <t.s...@fz...>]

just set the 'origin' of the fit in the middle of your time data:

toffset=strptime("%Y/%m/%d %H:%M","2010/02/20 23:28")
f(x)=a + b*(x-toffset)
fit f(x) "watthour.txt" using 1:4 via a,b

so that 'a' and 'b' are not influencing each other.


Guilherme Poleszuk wrote:
> 
> Hi!
>  
> I am a new user of gnuplot and my version is 4.2 patchlevel 6. I'm having
> a 
> trouble with "fit" function when I use xdata time as X axis values. Here
> my 
> script and data set.
>  
> # watthour.gnu
> # =========== < cut here
> reset
> set terminal png size 800,500 font comic 12 enhanced truecolor
> set output "watthour.png"
> set xdata time
> set timefmt "%Y/%m/%d %H:%M"
> set label "Powered by GnuPlot 4.2" at graph 0.87,-1.7 center font
> "lhandw,10" 
> textcolor rgb "#800080"
> show label
> set key below left vertical title "Variables"
> set border 3
> set xtics rotate by 45 offset graph -0.075,-0.30 textcolor rgb "#008000" 
> nomirror
> set ytics nomirror textcolor rgb "#008000" nomirror
> set format x "%d%b %Hh"
> set format x "%N"
> set format y "%6.1f"
> set xtics 86400
> set ytics 2
> set mxtics 12
> set mytics 5
> f(x)=a + b*x 
> fit f(x) "watthour.txt" using 1:4 via a,b
> set title "Kilowatts - 2010\n Fit Model: f(t) = a + b.t " font "comic, 12" 
> textcolor rgb "#800080"
> plot f(x) t"Projection" with lines 2, "watthour.txt" using 1:4 t "KWh"
> with 
> points 3
> # =========== < cut here
>  
> 
>  
> # watthour.txt
> # =========== < cut here
> #YYYY MM DD hh mm U  KWh
> 2010/02/19 23:36 3 22835.1
> 2010/02/20 08:05 3 22839.0
> 2010/02/20 10:32 3 22839.8
> 2010/02/20 11:32 3 22840.1
> 2010/02/20 12:49 3 22840.8
> 2010/02/20 23:28 3 22845.5
> 2010/02/21 01:40 3 22846.8
> 2010/02/21 13:45 3 22851.5
> 2010/02/21 22:09 3 22855.6
> 2010/02/22 18:06 3 22864.5
> 2010/02/22 22:14 3 22866.0
> # =========== < cut here
>  
>  
>  
> I believe that are a problem with "fit" function when I use xdata time, 
> because X values are converted to second since 2000/01/01 ( I think! ) and 
> this number get big compared to Y values... the algorith to "fit" the data
> to 
> the model has some dificulties with this. The curve not pass near of the 
> points, of course, it not pass over them, but should be pass so near
> because 
> it is a adjustment with "least squares"!! My data set file don't have
> outliers 
> to cause the problem that I report here.
>  
> I tried do some tests with this same data, changing time near year 2000
> and 
> the fit curv was diferent, but it curve should be the same angular
> coeficient. 
> Is it a bug or I'm commiting a mistake.
>  
> Thank you very much!
>  
> __________________________________
> Guilherme Poleszuk dos Santos Rosa
> São Paulo, Brazil
> 
> 
> ------------------------------------------------------------------------------
> Download Intel&#174; Parallel Studio Eval
> Try the new software tools for yourself. Speed compiling, find bugs
> proactively, and fine-tune applications for parallel performance.
> See why Intel Parallel Studio got high marks during beta.
> http://p.sf.net/sfu/intel-sw-dev
> _______________________________________________
> gnuplot-info mailing list
> gnu...@li...
> https://lists.sourceforge.net/lists/listinfo/gnuplot-info
> 
> 

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[Gnuplot-info] Fit trouble when I use xdata time (fit isn't so good)

[Guilherme P. <gpo...@gm...>]

Hi!
 
I am a new user of gnuplot and my version is 4.2 patchlevel 6. I'm having a 
trouble with "fit" function when I use xdata time as X axis values. Here my 
script and data set.
 
# watthour.gnu
# =========== < cut here
reset
set terminal png size 800,500 font comic 12 enhanced truecolor
set output "watthour.png"
set xdata time
set timefmt "%Y/%m/%d %H:%M"
set label "Powered by GnuPlot 4.2" at graph 0.87,-1.7 center font "lhandw,10" 
textcolor rgb "#800080"
show label
set key below left vertical title "Variables"
set border 3
set xtics rotate by 45 offset graph -0.075,-0.30 textcolor rgb "#008000" 
nomirror
set ytics nomirror textcolor rgb "#008000" nomirror
set format x "%d%b %Hh"
set format x "%N"
set format y "%6.1f"
set xtics 86400
set ytics 2
set mxtics 12
set mytics 5
f(x)=a + b*x 
fit f(x) "watthour.txt" using 1:4 via a,b
set title "Kilowatts - 2010\n Fit Model: f(t) = a + b.t " font "comic, 12" 
textcolor rgb "#800080"
plot f(x) t"Projection" with lines 2, "watthour.txt" using 1:4 t "KWh" with 
points 3
# =========== < cut here
 

 
# watthour.txt
# =========== < cut here
#YYYY MM DD hh mm U  KWh
2010/02/19 23:36 3 22835.1
2010/02/20 08:05 3 22839.0
2010/02/20 10:32 3 22839.8
2010/02/20 11:32 3 22840.1
2010/02/20 12:49 3 22840.8
2010/02/20 23:28 3 22845.5
2010/02/21 01:40 3 22846.8
2010/02/21 13:45 3 22851.5
2010/02/21 22:09 3 22855.6
2010/02/22 18:06 3 22864.5
2010/02/22 22:14 3 22866.0
# =========== < cut here
 
 
 
I believe that are a problem with "fit" function when I use xdata time, 
because X values are converted to second since 2000/01/01 ( I think! ) and 
this number get big compared to Y values... the algorith to "fit" the data to 
the model has some dificulties with this. The curve not pass near of the 
points, of course, it not pass over them, but should be pass so near because 
it is a adjustment with "least squares"!! My data set file don't have outliers 
to cause the problem that I report here.
 
I tried do some tests with this same data, changing time near year 2000 and 
the fit curv was diferent, but it curve should be the same angular coeficient. 
Is it a bug or I'm commiting a mistake.
 
Thank you very much!
 
__________________________________
Guilherme Poleszuk dos Santos Rosa
São Paulo, Brazil

Re: [Gnuplot-info] Adding "headroom" for autoscaling

[Hans-Bernhard B. <HBB...@t-...>]

Egil Kvaleberg wrote:

> Setting the yrange manually to [8.0:13.0] obviously fixes this, but I
> really would need to have autoscale to do this for me, but have found no
> way of achieving that. Have I overlooked something?

Only the "help offsets".

Re: [Gnuplot-info] GNUplot script for graphs from multiple data files

[Hans-Bernhard B. <HBB...@t-...>]

alaarman wrote:

> The all represent different measurements of the same experiment. Therefore,
> i'd like to create a errorlines where all this data is combined to get the
> average, minX and maxX. To automate this I wrote the script below.

... and you did it entirely in gnuplot.  The way it turned out suggests 
rather heavily that that was a bad idea.  gnuplot learned a good deal of 
new tricks on this front in recent times, but it's still not a data 
processing engine per se.

This would have been a whole lot simpler in awk, perl or any numerical 
programming language of your choice.

[Gnuplot-info] GNUplot script for graphs from multiple data files

[alaarman <a.w...@ew...>]

I have multiple data files which all look like this:
core  instance1 instance2 ...
1 34 32 ...
2 32 32 ...
3 25 43 ...
.. ...

The all represent different measurements of the same experiment. Therefore,
i'd like to create a errorlines where all this data is combined to get the
average, minX and maxX. To automate this I wrote the script below. But Im
getting into a swamp of complex recursive functions which only perform
simple tasks. So I guess my question is, can this be done more efficiently?

Thanks!
Regards,

Alfons

### configuration ###

filenames   = "dve div2"
fileset     = "1 2 3 4"
function    = "speedup"
cols        = "11 12 13"
num_cols    = 13

### plot code ###

mem=0
id(x) = x
first(x) = $1==1 ? mem=x : mem
time(x) = filename eq DVE ? (x/($1)) : x
speedup(x) = first(x)/time(x)

#comb=product("a b", "c d")
#print comb #yields: a_c a_d b_c b_d
#print w(word(com,2), 2) #yields: d
concat_ar(x,ar,i,s1,s2) = x . s1 . word(ar,i+1) .(i<words(ar)-1 ? s2.
concat_ar(x,ar,i+1,s1,s2) : "")
product1(ar1,ar2,i) =   concat_ar(word(ar1,i+1), ar2, 0, "_", " ")
.(i<words(ar1)-1 ? " ". product1(ar1,ar2,i+1) : "")
product(x, y) = product1(x,y,0)
w(x,n) = n==1 ? x[1:strstrt(x,"_")-1] : w(x[strstrt(x,"_")+1:*], n-1)

#print join("dve", "1 2 3") #yields: < join 1 2 | join - 3
fn(name,index) = (filename=name). "-". index .".dat"
join1(n,ar,i) = words(ar)==1 ? fn(name,ar) : i+2 == words(ar) ? \
                '< join '. fn(n, word(ar,i+1)) ." ". fn(n, word(ar,i+2)) : \
                join1(n,ar,i+1) ." | join - ". fn(n, word(ar,i+1))
join(n,ar)=join1(n,ar,0)

cols_tot(i) = i <= (words(fileset)-1)*num_cols+1 ? column(i) +
cols_tot(i+num_cols) : column(i)
cols_avg(i) = cols_tot(i) / words(fileset)
cols_max(i) = i <= (words(fileset)-1)*num_cols+1 ?
(column(i)>(rec=cols_max(i+num_cols)) ? column(i) : rec ) : column(i)
cols_min(i) = i <= (words(fileset)-1)*num_cols+1 ?
(column(i)<(rec=cols_min(i+num_cols)) ? column(i) : rec ) : column(i)

plot [.8:16] for [tuple in product(filenames, cols)] \
                    join(name=w(tuple,1), fileset) \
        using 1:(@function(cols_avg(w(tuple,2)))): \
                (@function(cols_min(w(tuple,2)))): \
                (@function(cols_max(w(tuple,2)))) \
        title column(w(tuple,2)) \
        with errorlines;
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[Gnuplot-info] Trying to create audiogram chart with gnuplot - need help including custom symbols

[t p. <tee...@gm...>]

Audiograms are used in hearing tests, and they look something like the
following:

http://www.mydr.com.au/files/images/categories/hearing/audiogrammixedv2.jpg

I've tried to create an audiogram using gnuplot, but I ran into problems. It
was very easy to do the following tasks:

- set tics for x and y
- set x scale as logarithmic
- draw grid
- draw lines

However, I couldn't figure out how to include custom symbols to the chart.
The example picture shows some of the symbols that can be used. Also othe
symbols exist.

I created the symbols and stored them to PNG files, but when I used plot
command with the images I found several issues:

- Image is plotted so, that it's left upper corner is in the given
coordinates. Instead, the image's center point should be in the given
coordinates.
- Plotting images don't work with logarithmic scale (which makes sense since
they are plotted utilizing the chart's coordinates, but it isn't feasible in
this case)
- PNG transparency doesn't seem to work

What I would like to do is tell gnuplot to plot my image to specific
coordinates so that I give center point of the image and size of the plotted
image in pixels (x & y). If this is not possible can I somehow achieve
similar result?

I could even superimpose the symbols to a bitmap plot using e.g. Imagemagick
if there was a way to find out the correct position (for example, x and y
pixel locations of 70 dB & 1000 Hz).

[Gnuplot-info] plotting 4D data?

[Rajarshi T. <raj...@gm...>]

Hi friends,

I have to plot a scaler quantity on a 3d regular grid.

1 1 1  0.2
1 1 2  0
1 1 3  0.5
-
-
-
Is there a way of plotting it in gnuplot, so that i can place a color at
given point using $4, and fill the region between the points using some
interpolating scheme, like what we do in pm3d in a 2d plots?

Thanks in advance

Rajarshi

[Gnuplot-info] Adding "headroom" for autoscaling

[Egil K. <eg...@kv...>]

Suppose you have a data set in a file "test.dat" like this:

   1  10.0
   2  9.0
   3  9.0
   4  11.0
   5  12.0
   6  12.0

Using the default autoscaling to plot, like this

   plot "test.dat" with lines

gives an ugly result. The plotted line between 2 and 3, and also between
5 and 6 on the X-axis gets hidden by the graph border, and especially
for the case between 5 and 6, it is especially misleading since the
observer will be led to believe there is no data between 5 and 6.

Setting the yrange manually to [8.0:13.0] obviously fixes this, but I
really would need to have autoscale to do this for me, but have found no
way of achieving that. Have I overlooked something? The logic I am after
is that if the autorange reaches an exact tic, it should extend the
range to the next one, in either end. It seems like an obvious thing?

Sincerely,

Egil Kvaleberg

[Gnuplot-info] splot without border, fill frame

[Tim C. <tc...@gp...>]

I need to splot pm3d (or similar) where the plot fills the .png output
size, ie. no background, no tics, no title, nothing.

For weeks now I have trawled the web, read and read, nothing, but plenty
of other people try and find the solution too. Some workaround using
image post processing software. If there is an answer I suggest it is
put into the FAQ.

There is talk about with image but never concrete examples which
demonstrate this working.

Here is a tiny example. The color oval needs to touch the image borders.

http://www.gpsl.net/data/plain_demo.png

If you provide an answer, thank you.

Re: [Gnuplot-info] plotting rgb images

[Martin B. <m.b...@st...>]

thanks, this is working!
It is possible to specify color ranges from 0.0 to 1.0 or from 0 to 255
(both is working).

Martin



On Mi, 2010-02-17 at 03:21 -0800, Thomas Sefzick wrote:
> plot 'image.rgb' with rgbimage
> 
> see 'help rgbimage'
>  
> 
> Martin Becker-5 wrote:
> > 
> > Hello,
> > 
> > I want to plot images with gnuplot 4.2.4-6.
> > I wrote a small C program that extracts RGB values for each pixel and
> > stores it to a ASCII-file which should be supported.
> > The first column is the x-position, the second the y-position, the rest
> > are the rgb values:
> > 0 0 255 255 255
> > 1 0 255 255 255
> > 2 0 255 255 255
> > 3 0 255 255 255
> > 4 0 255 255 255
> > 5 0 255 255 255
> > 6 0 255 255 255
> > 7 0 255 255 255
> > 8 0 255 255 255
> > 9 0 255 255 255
> > ...
> > The first pixels are all white.
> > First question: Should I use a range from 0 to 255 or from 0 to 1?
> > 
> > Second question: How can I now plot that data?
> > In the demo scripts I can only find examples with binary data.
> > I tried many options similar to:
> > plot 'image.rgb' format='%uchar%uchar%uchar' using ($3+$4+$5) with
> > rgbimage
> > and
> > plot 'image.rgb' array=(1852x917) with rgbimage
> > when using implicit xy-coordinates (without the first columns).
> > 
> > I'm sure someone can point me to the solution.
> > 
> > Thanks for your help!
> > 
> > Martin

Re: [Gnuplot-info] plotting rgb images

[Thomas S. <t.s...@fz...>]

plot 'image.rgb' with rgbimage

see 'help rgbimage'
 

Martin Becker-5 wrote:
> 
> Hello,
> 
> I want to plot images with gnuplot 4.2.4-6.
> I wrote a small C program that extracts RGB values for each pixel and
> stores it to a ASCII-file which should be supported.
> The first column is the x-position, the second the y-position, the rest
> are the rgb values:
> 0 0 255 255 255
> 1 0 255 255 255
> 2 0 255 255 255
> 3 0 255 255 255
> 4 0 255 255 255
> 5 0 255 255 255
> 6 0 255 255 255
> 7 0 255 255 255
> 8 0 255 255 255
> 9 0 255 255 255
> ...
> The first pixels are all white.
> First question: Should I use a range from 0 to 255 or from 0 to 1?
> 
> Second question: How can I now plot that data?
> In the demo scripts I can only find examples with binary data.
> I tried many options similar to:
> plot 'image.rgb' format='%uchar%uchar%uchar' using ($3+$4+$5) with
> rgbimage
> and
> plot 'image.rgb' array=(1852x917) with rgbimage
> when using implicit xy-coordinates (without the first columns).
> 
> I'm sure someone can point me to the solution.
> 
> Thanks for your help!
> 
> Martin
> 
> 
> ------------------------------------------------------------------------------
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