gnuplot-info — For questions and discussion about gnuplot

Re: [Gnuplot-info] getting the time value for time series data

[<HBB...@t-...>]

Andy S. wrote:

> I wish there was some way to get the x time value.  Is there
> already a way?  - I was unable to puzzle one out...

The thing you're looking for is the timecolumn() function.  It works 
just like column() (which you know best in its shorthand form, $1), but 
tries to figure out time/date data, too.

[Gnuplot-info] getting the time value for time series data

[Andy S. <ae...@sn...>]

I have a question, which if the answer is "you can't do that", might
be a suggestion:

Let say I have a data file with some time data:

2004 11  1  100.0
2005  1 15   90.2
2005  3 28   60.4
2006  4 15   23.8, etc

I do:

set xdata time
set timefmt "%Y %m %d"
p "data" us 1:4

Now I define a function:

f(t) = a * exp( -(t - t0) / tc)

I can fit with this function, and over plot the fit with:

p "data" us 1:4, f(x)

In the above, the function is called with the time in seconds.

But now I wish I could plot the residuals.

The thing I tried first:

p "data" us 1:4, "" us 1:($4 - f($1))

This produces a plot, but f() is called with just the year - not
the time is seconds.

I wish there was some way to get the x time value.  Is there
already a way?  - I was unable to puzzle one out...

Two possible syntaxes that I've thought of:

allow "$x" in a using expression to evaluate to the time
(and $y if "set ydata time" is in effect")

p "data" us 1:4,"" us 1:($4 - f($x))

of define a function, xtim (and ytim), which could be called with the
data file line number if it needs to have an argument

p "data" using 1:4,"" us 1:($4 - f(xtim($0)))

Comments?
Thanks,
  Andy S.

Re: [Gnuplot-info] (no subject)

[Till S. <til...@im...>]

On Thu, 1 Mar 2007 18:29:20 -0500
"Sadeghian, Soroush" <SOR...@sa...> wrote:

> 1.  if I want to plot another set of numbers (different file) with
> different colors, on top of my previous plotted points from the first
> file, how can I do this?

This is straightforward, and following the example given by Ramzi

> gnuplot>plot "file.txt" u 3:1

you can simply add more files by separating them with a comma, e.g.

gnuplot>plot "file1.txt" u 3:1, "file2.txt" u 4:1

etc. A different colour / linestyle will be chosen automatically, if
you want more control of this, see the link below.

> 2.  How can I export the graph once it is finished plotting the blue
> points on top of the red points?  Where can I export it to? How?

You have to set the "terminal" to an output type first. For example, if
you want an eps file named "MyGraph.eps" in color, with the example
above, do something like

gnuplot>set terminal postscript enhanced eps color
gnuplot>set output "MyGraph.eps"
gnuplot>plot "file1.txt" u 3:1, "file2.txt" u 4:1

Of course, there are many more options on how to do a plot, which
output format to chose etc. I would suggest you read the following
introduction to gnuplot:

http://t16web.lanl.gov/Kawano/gnuplot/index-e.html

Regards
Till

Re: [Gnuplot-info] (no subject)

[Sadeghian, S. <SOR...@sa...>]

Thanks! That's great.  I also was wondering if you could help me with 2
more questions:

1.  if I want to plot another set of numbers (different file) with
different colors, on top of my previous plotted points from the first
file, how can I do this?

2.  How can I export the graph once it is finished plotting the blue
points on top of the red points?  Where can I export it to? How?

Thank you so much again,

I really appreciate your quick response.

Kevin

=20

-----Original Message-----
From: als...@ma... [mailto:als...@ma...]=20
Sent: Thursday, March 01, 2007 6:16 PM
To: gnu...@li...
Cc: Sadeghian, Soroush
Subject:=20

Quoting "Sadeghian, Soroush"
> Hi,
>
> I have about a million points in excel that I'm trying to plot.
>
> How would I go about doing this?
>
>
>
> I'm very new to this. Please help.
>
>
>
> Thank you in advance for any help.
>
> K.

it's very easy in gnuplot to do that. Let us assume that you have a=20
file "file.txt" with 4 columns $1 $2 $3 $4 seperated by spaces, tabs,=20
...etc
you are interested to plot say the values in column $1 (y axis) versus=20
the values in column $3 ( x axis) then the minimum command will be:

gnuplot>plot "file.txt" u 3:1

that's it. If they are milion points it is going to take some time for=20
the plot to show up in xterm pop up window, but certainely gnuplot is=20
more powerfull than Excel in plotting large sets.
I hope that helps.
Ramzi Alsallaq
Florida State University
tallahassee FL


----------------------------------------------------------------

[Gnuplot-info] (no subject)

[<als...@ma...>]

Quoting "Sadeghian, Soroush"
> Hi,
>
> I have about a million points in excel that I'm trying to plot.
>
> How would I go about doing this?
>
>
>
> I'm very new to this. Please help.
>
>
>
> Thank you in advance for any help.
>
> K.

it's very easy in gnuplot to do that. Let us assume that you have a 
file "file.txt" with 4 columns $1 $2 $3 $4 seperated by spaces, tabs, 
...etc
you are interested to plot say the values in column $1 (y axis) versus 
the values in column $3 ( x axis) then the minimum command will be:

gnuplot>plot "file.txt" u 3:1

that's it. If they are milion points it is going to take some time for 
the plot to show up in xterm pop up window, but certainely gnuplot is 
more powerfull than Excel in plotting large sets.
I hope that helps.
Ramzi Alsallaq
Florida State University
tallahassee FL


----------------------------------------------------------------

[Gnuplot-info] Question

[Sadeghian, S. <SOR...@sa...>]

Hi,

I have about a million points in excel that I'm trying to plot.

How would I go about doing this?

=20

I'm very new to this. Please help.

=20

Thank you in advance for any help.

K.

=20

Re: [Gnuplot-info] multiplot epslatex term help

[<als...@ma...>]

Hi;
  I am writting my thesis and got into the problem of having a 
multiplot generated by gnuplot 4.0.0 using the term epslatex and 
eventually included in latex document via \input{fig} where fig.tex, 
and fig.eps both where generated by epslatex terminal. I am using 
TexShop on a mac os x, so what follows apply to latex on mac os x, and 
might not apply to other situations. My figure was broken in the pdf 
file generated by Latex typesetting. I was wondering what could 
possibly be the problem, and I searched google to find this thread. I 
tried pause -1 between plot commands, didn't work!. Anyways, I am by no 
means an expert on latex or gnuplot, but I believe that fig.eps picture 
file has problems when included in the picture environment in the 
fig.tex file that what I discovered after some experimentation. So I 
have the following procedure:
1. do your multiplot as usual and set the terminal epslatex and the 
output file (say fig.eps) pretending there is no problem.
2. convert the fig.eps file to fig.png
3. edit the fig.tex file to include the fig.png file rather than 
fig.eps (explicitly write fig.png)
4.  include the fig in latex by \input{fig} (with no extentions). 
Typeset latex and generate your pdf file you will see the pictures 
generated from fig.png and that from fig.tex are intact, but displaced.
5. edit the coordinates in the second picture environment command to 
fit the two together.
6. finally edit the labels, and the other fine things you want to see 
in the plot.
7. typeset again to see if everything looks fine.
hope that help.
thanks
Ramzi Alsallaq
Florida State University
Tallahassee, FL

----------------------------------------------------------------

[Gnuplot-info] Gnuplot program

[maura p. <kra...@ya...>]

Dear Gnoplot Representative,
    Glancing through your gallery, I got the idea that
the images I am sending to you are possible in
reproducing accurately with your software. I was
wondering if you could confirm this and possibly guide
me in making them. I appreciate your time.
Thnak you,
Maura


 
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Re: [Gnuplot-info] ask for gnuplot

[<HBB...@t-...>]

murat selim Xepni wrote:

> a,b,c and d may be coordinat values along the x axis.
> f(x) polynom's graphic between a and b (xrange[a,b]),
> g(x) polynom's graphic between b and c
> (xrange[b,c]),h(x) polynom's graphic between c and d
> (xrange[c,d]). 

gnuplot supports the ternary operator of the C programming language for 
work like that:

	set xrange [a:d]
	plot (x < b) ? f(x) : (x < c) ? g(x) : h(x)

Consult "help ternary" to understand how this works.

Re: [Gnuplot-info] Tilde and hat directly above a letter

[<HBB...@t-...>]

Carpenter Amos wrote:
> I would be very grateful if someone could show me how to put a hat (^)
> directly above w and a tilde (~) directly above D. 

In which terminal driver?

 > In Latex one would
> write $\hat{w}$ and $\tilde{D}$.

You can do exactly that in gnuplot, if you choose one of the terminal 
drivers that output text via (La)TeX, most notably pslatex.

>    set label "\\{\303{w}_{k,16}\\}@^{16}_{k=1} at 0.694, 0.846 left

That cannot work --- the closing " is missing.

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Re: [Gnuplot-info] ask for gnuplot

[Sawala, T. <til...@im...>]

Hi Murat,

You can specify different ranges for each function in square bracktes, =
e.g. use something like

plot [0:10] f(x), [5:15] g(x)

Regards
Till

[Gnuplot-info] ask for gnuplot

[murat s. ç. <ms...@ya...>]

Hi. My name is Murat, from turkey. I've met to gnuplot
a few days ago. I want to make use of gnuplot, but I
have a problem which I can't solve it. Ýf you're make
me help, I'll be very pleasure. I need drawing three
different bivariant polynom e.g f(x),g(x) and h(x). I
know that using multiplot function is posible. But I
want that all drawing on the same graphic and each
polynom must have to different range. For example;
a,b,c and d may be coordinat values along the x axis.
f(x) polynom's graphic between a and b (xrange[a,b]),
g(x) polynom's graphic between b and c
(xrange[b,c]),h(x) polynom's graphic between c and d
(xrange[c,d]). I look at the origin commmand, but I
think that this command working with screeen values. 
Therefore using of coordinat values on range
definition is not possible. My ask for you is this
subject, How can I draw three functions with special
ranges in same coordinate system? Already now thanks
for suggestions. yours respectfully
murat selim cepni 
ms...@ya...



 
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<META http-equiv=3DContent-Type content=3D"text/html; charset=3Diso-8859-1">
<META content=3D"MSHTML 6.00.2900.2912" name=3D"GENERATOR">
</HEAD>
<BODY>
<DIV align=3Dleft><FONT face=3DArial size=3D2><B><I>GDKI IS THE TRUE SUPERNOVA</I></B></FONT></DIV><BR>
<DIV align=3Dleft><FONT face=3DArial size=3D2>GOLDMARK INDUSTRIES - PUTTING HABANA BLUES ON THE MAP!</FONT></DIV>
<DIV align=3Dleft><FONT face=3DArial size=3D2>Ticker: <B>GDKI</B> </FONT></DIV>
<DIV align=3Dleft><FONT face=3DArial size=3D2>Trade: <B>February 26 Monday, 2007</B> </FONT></DIV>
<DIV align=3Dleft><FONT face=3DArial size=3D2>GDKI Price: $0.13 </FONT></DIV><BR>
<DIV align=3Dleft><FONT face=3DArial size=3D2>2007-02-20 05:39 ET - News Release</FONT></DIV>
<DIV align=3Dleft><FONT face=3DArial size=3D2><U>LOS ANGELES & NEW YORK -- (BizWire)</U></FONT></DIV>
<DIV align=3Dleft><FONT face=3DArial size=3D2>Habana Blues Continues to Generate International and Domestic Buzz; the Award Winning Film to Be Featured at the Exclusive Latin American Film Festival Champaign, Illinois -- February 23rd to March 1st</FONT></DIV><BR>
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[Gnuplot-info] Tilde and hat directly above a letter

[Carpenter A. <aca...@bu...>]

I would be very grateful if someone could show me how to put a hat (^)
directly above w and a tilde (~) directly above D. In Latex one would 
write $\hat{w}$ and $\tilde{D}$. I tried

   set label "\\{\303{w}_{k,16}\\}@^{16}_{k=1} at 0.694, 0.846 left

but I got the hat on the lefthand side of w and not directly above w.
However, I want "^" directly above w and "~" directly above D. Thanks
for any help.

Amos. 
=================
Amos J. Carpenter 
Mathematics and Actuarial Science
Butler University
4600 Sunset Avenue
Indianapolis, IN 46208-3485

Re: [Gnuplot-info] XY ranges and asymptotes

[<HBB...@t-...>]

pol wrote:

> I would like to use gnuplot together with maxima (computer algebra system) 
> for didactical purposes. It would be very useful if gnuplot were able 
> to set the default X and Y range and to plot a dotted line to make asyptotes
> visible.
> Is it possible to achieve such result, through a proper configuration
> setting? 

It's unclear to me what it is you actually want, so I can't tell you if 
it can be done.

What is "the default X and Y range"?  Please be sure to read "help 
xrange" and "help autoscale" before replying, so you can

gnuplot can display asymptotes via 'set arrow' commands or as additional 
curves in 'set parametric' mode.  It can't compute where the asymptotes 
should be, though.

Re: [Gnuplot-info] plot using unique and ranges

[<HBB...@t-...>]

Leonardo Leiria Fernandes wrote:

> Yes, what I want is to show the errorbar endpoints instead of just the averages. 
> Is it possible? 

If your input data has error bars, "smooth unique" will average their 
endpoints just like it does the y values themselves.  It won't compute 
what you originally seemed to be looking for, though: minimum and 
maximum y values.

> How can I do it?

	plot 'data' using 1:2:3 smooth uniq with errorbars

[Gnuplot-info] =?gb2312?B?QVJNOS9MaW51eC9XaW5kb3dzQ0XF4NG10MXPoii12jc4xtqjqSEg?=

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[Gnuplot-info] XY ranges and asymptotes

[pol <lin...@ya...>]

Hi all

I would like to use gnuplot together with maxima (computer algebra system) 
for didactical purposes. It would be very useful if gnuplot were able 
to set the default X and Y range and to plot a dotted line to make asyptotes
visible.
Is it possible to achieve such result, through a proper configuration
setting? 


thank you 

--
Pol

Re: [Gnuplot-info] plot using unique and ranges

[Leonardo L. F. <leo...@gm...>]

Hans-Bernhard Bröker <HBBroeker <at> t-online.de> writes:

> 
> Leonardo Leiria Fernandes wrote:
> 
> > I would like to know if it is possible to do this same plot but 
> > showing the ranges of the values in the y axis 
> > (i.e. to evaluatethe variance), instead of only the averages.
> 
> Only by doing it outside gnuplot.  'smooth unique' only computes 
> averages --- of y values, and x and y errorbar endpoints.

Yes, what I want is to show the errorbar endpoints instead of just the averages. 
Is it possible? How can I do it?

Thanks,
Leonardo.

Re: [Gnuplot-info] plot using unique and ranges

[<HBB...@t-...>]

Leonardo Leiria Fernandes wrote:

> I would like to know if it is possible to do this same plot but 
> showing the ranges of the values in the y axis 
> (i.e. to evaluatethe variance), instead of only the averages.

Only by doing it outside gnuplot.  'smooth unique' only computes 
averages --- of y values, and x and y errorbar endpoints.

[Gnuplot-info] plot using unique and ranges

[Leonardo L. F. <leo...@gm...>]

Hello,

I am ploting three data files using the "smooth unique" option 
in the following way:

plot "file1" using 1:2 title 'A' w lines smooth unique, 
"file2"  using 1:2 title 'B' w lines smooth unique, 
"file3" using 1:2 title 'C' w lines smooth unique

I would like to know if it is possible to do this same plot but 
showing the ranges of the values in the y axis 
(i.e. to evaluatethe variance), instead of only the averages.

Thank you very much.

Re: [Gnuplot-info] splot (pm3d map) and plot at the same time (Rudolf Izsak)

[Gavin B. <gav...@ya...>]

Hi Rudolf,=0A=0AYou can (sort of) by using the multiplot, but its not ideal=
 as the x and y range and everything have to be manually moved around and y=
ou have to scale and move the two plots so that they overlap (using set siz=
e and set origin). I've gone through this process for vector plots (vector =
plot over a pm3d contour). If you just want points and things though then t=
ry splot 'data.dat' u 1:2:(10), where data.dat is your 2D plot data and (10=
) is just a number greater than the z range of your pm3d plot.=0A=0AHope th=
is helps,=0A=0AGavin=0A=0A=0ADear Supporter,=0A=0AI'm wonder whether I can =
splot a pm3d map and plot at the same time, so that I can put points or sig=
ns to a map plot, as it would be a regular 2D plotting.=0A=0AIs it possible=
 with gnuplot? I don't find any documentation about it.=0A=0AI would be gra=
teful if You could help me.=0A=0ASincerely Yours,=0A=0ARudolf Izsak=0A=0A=
=0A=0A=0A=0A=0A=0A =0A_____________________________________________________=
_______________________________=0ABe a PS3 game guru.=0AGet your game face =
on with the latest PS3 news and previews at Yahoo! Games.=0Ahttp://videogam=
es.yahoo.com/platform?platform=3D120121

Re: [Gnuplot-info] creating "high school" style graphs

[<dav...@ya...>]

Thanks for the many helpful suggestions. Here is my current script:=0A=0Aun=
set key=0Aset xrange [-8.4:8.4]=0Aset yrange [-8.4:8.4]=0Aset size square=
=0Aset grid=0Aset border 0=0Aset xtics axis=0Aset ytics axis=0Aset format x=
 ""=0Aset format y ""=0Aset arrow from -8.4,0 to 8.4,0 lw 2 lt 8=0Aset arro=
w from 0,-8.4 to 0,8.4 lw 2 lt 8=0Aset xtics (-8,-7,-6,-5,-4,-3,-2,-1,0,1,2=
,3,4,5,6,7,8)=0Aset ytics (-8,-7,-6,-5,-4,-3,-2,-1,0,1,2,3,4,5,6,7,8)=0Aset=
 label "1" at 1, -0.3=0Aset label "1" at -0.3, 1=0Aset label "x" at 8.2, -0=
.3=0Aset label "y" at -0.3, 8.2=0Aplot x*x/4 - 7=0A=0ADavid Radcliffe=0A=0A=
=0A=0A=0A=0A=0A =0A________________________________________________________=
____________________________=0AExpecting? Get great news right away with em=
ail Auto-Check. =0ATry the Yahoo! Mail Beta.=0Ahttp://advision.webevents.ya=
hoo.com/mailbeta/newmail_tools.html