gnuplot-info — For questions and discussion about gnuplot

[Gnuplot-info] [gnuplot-info] Unable to output as pdf format on Mac

[Shuai W. <wan...@gm...>]

Hello list,

I am trying to use gnuplot to produce pdf figures on my mac. Here is the
configurations:

gnuplot: version 5.0
os:      OS X EI Capitan Version 10.11.6I installed the gnuplot with

brew install gnuplot --with-x11

But when I tried to produce figures with

set term pdf
....
....

I will receive the errors about the undefined pdf format.

Actually when I try to print out all the supported format of gnuplot:

$ gnuplot
> set term
....

I cannot find the pdf format in the list of supported formats.

Here is my question, how can I use set term pdf with gnuplot on the mac? It
is always workable on my Linux machines...

Am I clear enough? Thank you a lot for the help!

Sincerely,

Shuai

Re: [Gnuplot-info] gnuplot 5.0 mouse problems

[Pietro C. <co...@gm...>]

great! It works!
forget my previous email..
Thanks a lot Ethan!
Piero

On Thu, Aug 11, 2016 at 12:21 AM, Ethan Merritt <eam...@gm...> wrote:

> Oh wait a minute. I was testing interactively.  Yeah, if you put those
> commands in
> a script and execute from the command line as "gnuplot script.gp" then it
> will exit
> at the end of the "pause mouse", so nothing written to file.   Change
> "pause mouse"
> to "pause mouse button3" or "pause mouse close" and you should be fine.
>
> On Wed, Aug 10, 2016 at 3:12 PM, Ethan Merritt <eam...@gm...>
> wrote:
>
>> The "pause mouse" command tells it to wait for the next mouse click (any
>> button).
>> That means the next button1 click is used to terminate the pause command
>> rather
>> than to execute the "print MOUSE_X" command.  I think you want instead
>> "pause mouse button3".  Nevertheless, even if your first click was
>> consumed by
>> the pause rather than the print, all subsequent clicks should cause a
>> print to file.
>> And indeed they do when I test here.   So I guess I can't reproduce your
>> problem
>> except for the case of the first mouse click.
>>
>> On Wed, Aug 10, 2016 at 2:03 PM, Pietro Corvisiero <co...@gm...>
>> wrote:
>>
>>> I upgraded from gnuplot 4.6 to gnuplot 5.0 on Linux Ubuntu 14.04.
>>> After upgrading, apart minor problems, I cannot handle mouse support.
>>> My goal is to click (left button) on screen and print MOUSE_X values to a
>>> file as may  times as I need. The procedure ends clicking right button:
>>> the
>>> x11 window closes and the control comes back to the next script
>>> commands..
>>> Just to summarize my problem I enclose a few lines script, working fine
>>> on
>>> gluplot 4.6, but not on gnuplot 5.0.
>>> Running gnuplot5, I see on the x11 window the mouse prompt (a cross) but
>>> after the first click the procedure stops and nothing is written on file.
>>> Can someone solve my problem? Many thanks!
>>>
>>> set mouse
>>> f(x)=x
>>> set  print 'temp_ch'
>>> set term x11
>>> #bind all "Button1" "print MOUSE_X; replot"
>>> bind all "Button1" "print MOUSE_X"
>>> bind "Button1"
>>> plot f(x)
>>> pause mouse
>>> ------------------------------------------------------------
>>> ------------------
>>> What NetFlow Analyzer can do for you? Monitors network bandwidth and
>>> traffic
>>> patterns at an interface-level. Reveals which users, apps, and protocols
>>> are
>>> consuming the most bandwidth. Provides multi-vendor support for NetFlow,
>>> J-Flow, sFlow and other flows. Make informed decisions using capacity
>>> planning reports. http://sdm.link/zohodev2dev
>>> _______________________________________________
>>> gnuplot-info mailing list
>>> gnu...@li...
>>> Membership management via: https://lists.sourceforge.net/
>>> lists/listinfo/gnuplot-info
>>>
>>
>>
>

Re: [Gnuplot-info] gnuplot 5.0 mouse problems

[Pietro C. <co...@gm...>]

very strange..

I even tried this stupid case:

set mouse
f(x)=x
#set  print 'temp_ch'
a=3333
set term x11
bind all "Button1" "print a"
bind "Button1"
plot f(x)
pause mouse

I also tried using: pause mouse "Button3" ...
Nothing to do: after the first click the x11 window closes and the value
"3333" is not printed on screen…
I suspect that something related to the mouse handling is missing in my
(default) gnuplot installation..
Can somebody give me detailed instructions about the steps to do to
reinstall gnuplot 5.04?
And also a correct version of this simple script? Why my output
is different from Ethan's one?
Many thanks!!


On Thu, Aug 11, 2016 at 12:12 AM, Ethan Merritt <eam...@gm...> wrote:

> The "pause mouse" command tells it to wait for the next mouse click (any
> button).
> That means the next button1 click is used to terminate the pause command
> rather
> than to execute the "print MOUSE_X" command.  I think you want instead
> "pause mouse button3".  Nevertheless, even if your first click was
> consumed by
> the pause rather than the print, all subsequent clicks should cause a
> print to file.
> And indeed they do when I test here.   So I guess I can't reproduce your
> problem
> except for the case of the first mouse click.
>
> On Wed, Aug 10, 2016 at 2:03 PM, Pietro Corvisiero <co...@gm...>
> wrote:
>
>> I upgraded from gnuplot 4.6 to gnuplot 5.0 on Linux Ubuntu 14.04.
>> After upgrading, apart minor problems, I cannot handle mouse support.
>> My goal is to click (left button) on screen and print MOUSE_X values to a
>> file as may  times as I need. The procedure ends clicking right button:
>> the
>> x11 window closes and the control comes back to the next script commands..
>> Just to summarize my problem I enclose a few lines script, working fine on
>> gluplot 4.6, but not on gnuplot 5.0.
>> Running gnuplot5, I see on the x11 window the mouse prompt (a cross) but
>> after the first click the procedure stops and nothing is written on file.
>> Can someone solve my problem? Many thanks!
>>
>> set mouse
>> f(x)=x
>> set  print 'temp_ch'
>> set term x11
>> #bind all "Button1" "print MOUSE_X; replot"
>> bind all "Button1" "print MOUSE_X"
>> bind "Button1"
>> plot f(x)
>> pause mouse
>> ------------------------------------------------------------
>> ------------------
>> What NetFlow Analyzer can do for you? Monitors network bandwidth and
>> traffic
>> patterns at an interface-level. Reveals which users, apps, and protocols
>> are
>> consuming the most bandwidth. Provides multi-vendor support for NetFlow,
>> J-Flow, sFlow and other flows. Make informed decisions using capacity
>> planning reports. http://sdm.link/zohodev2dev
>> _______________________________________________
>> gnuplot-info mailing list
>> gnu...@li...
>> Membership management via: https://lists.sourceforge.net/
>> lists/listinfo/gnuplot-info
>>
>
>

Re: [Gnuplot-info] gnuplot 5.0 mouse problems

[Ethan M. <eam...@gm...>]

Oh wait a minute. I was testing interactively.  Yeah, if you put those
commands in
a script and execute from the command line as "gnuplot script.gp" then it
will exit
at the end of the "pause mouse", so nothing written to file.   Change
"pause mouse"
to "pause mouse button3" or "pause mouse close" and you should be fine.

On Wed, Aug 10, 2016 at 3:12 PM, Ethan Merritt <eam...@gm...> wrote:

> The "pause mouse" command tells it to wait for the next mouse click (any
> button).
> That means the next button1 click is used to terminate the pause command
> rather
> than to execute the "print MOUSE_X" command.  I think you want instead
> "pause mouse button3".  Nevertheless, even if your first click was
> consumed by
> the pause rather than the print, all subsequent clicks should cause a
> print to file.
> And indeed they do when I test here.   So I guess I can't reproduce your
> problem
> except for the case of the first mouse click.
>
> On Wed, Aug 10, 2016 at 2:03 PM, Pietro Corvisiero <co...@gm...>
> wrote:
>
>> I upgraded from gnuplot 4.6 to gnuplot 5.0 on Linux Ubuntu 14.04.
>> After upgrading, apart minor problems, I cannot handle mouse support.
>> My goal is to click (left button) on screen and print MOUSE_X values to a
>> file as may  times as I need. The procedure ends clicking right button:
>> the
>> x11 window closes and the control comes back to the next script commands..
>> Just to summarize my problem I enclose a few lines script, working fine on
>> gluplot 4.6, but not on gnuplot 5.0.
>> Running gnuplot5, I see on the x11 window the mouse prompt (a cross) but
>> after the first click the procedure stops and nothing is written on file.
>> Can someone solve my problem? Many thanks!
>>
>> set mouse
>> f(x)=x
>> set  print 'temp_ch'
>> set term x11
>> #bind all "Button1" "print MOUSE_X; replot"
>> bind all "Button1" "print MOUSE_X"
>> bind "Button1"
>> plot f(x)
>> pause mouse
>> ------------------------------------------------------------
>> ------------------
>> What NetFlow Analyzer can do for you? Monitors network bandwidth and
>> traffic
>> patterns at an interface-level. Reveals which users, apps, and protocols
>> are
>> consuming the most bandwidth. Provides multi-vendor support for NetFlow,
>> J-Flow, sFlow and other flows. Make informed decisions using capacity
>> planning reports. http://sdm.link/zohodev2dev
>> _______________________________________________
>> gnuplot-info mailing list
>> gnu...@li...
>> Membership management via: https://lists.sourceforge.net/
>> lists/listinfo/gnuplot-info
>>
>
>

Re: [Gnuplot-info] gnuplot 5.0 mouse problems

[Ethan M. <eam...@gm...>]

The "pause mouse" command tells it to wait for the next mouse click (any
button).
That means the next button1 click is used to terminate the pause command
rather
than to execute the "print MOUSE_X" command.  I think you want instead
"pause mouse button3".  Nevertheless, even if your first click was consumed
by
the pause rather than the print, all subsequent clicks should cause a print
to file.
And indeed they do when I test here.   So I guess I can't reproduce your
problem
except for the case of the first mouse click.

On Wed, Aug 10, 2016 at 2:03 PM, Pietro Corvisiero <co...@gm...>
wrote:

> I upgraded from gnuplot 4.6 to gnuplot 5.0 on Linux Ubuntu 14.04.
> After upgrading, apart minor problems, I cannot handle mouse support.
> My goal is to click (left button) on screen and print MOUSE_X values to a
> file as may  times as I need. The procedure ends clicking right button: the
> x11 window closes and the control comes back to the next script commands..
> Just to summarize my problem I enclose a few lines script, working fine on
> gluplot 4.6, but not on gnuplot 5.0.
> Running gnuplot5, I see on the x11 window the mouse prompt (a cross) but
> after the first click the procedure stops and nothing is written on file.
> Can someone solve my problem? Many thanks!
>
> set mouse
> f(x)=x
> set  print 'temp_ch'
> set term x11
> #bind all "Button1" "print MOUSE_X; replot"
> bind all "Button1" "print MOUSE_X"
> bind "Button1"
> plot f(x)
> pause mouse
> ------------------------------------------------------------
> ------------------
> What NetFlow Analyzer can do for you? Monitors network bandwidth and
> traffic
> patterns at an interface-level. Reveals which users, apps, and protocols
> are
> consuming the most bandwidth. Provides multi-vendor support for NetFlow,
> J-Flow, sFlow and other flows. Make informed decisions using capacity
> planning reports. http://sdm.link/zohodev2dev
> _______________________________________________
> gnuplot-info mailing list
> gnu...@li...
> Membership management via: https://lists.sourceforge.net/
> lists/listinfo/gnuplot-info
>

[Gnuplot-info] gnuplot 5.0 mouse problems

[Pietro C. <co...@gm...>]

I upgraded from gnuplot 4.6 to gnuplot 5.0 on Linux Ubuntu 14.04.
After upgrading, apart minor problems, I cannot handle mouse support.
My goal is to click (left button) on screen and print MOUSE_X values to a
file as may  times as I need. The procedure ends clicking right button: the
x11 window closes and the control comes back to the next script commands..
Just to summarize my problem I enclose a few lines script, working fine on
gluplot 4.6, but not on gnuplot 5.0.
Running gnuplot5, I see on the x11 window the mouse prompt (a cross) but
after the first click the procedure stops and nothing is written on file.
Can someone solve my problem? Many thanks!

set mouse
f(x)=x
set  print 'temp_ch'
set term x11
#bind all "Button1" "print MOUSE_X; replot"
bind all "Button1" "print MOUSE_X"
bind "Button1"
plot f(x)
pause mouse

[Gnuplot-info] Ellipse Carving?

[mikeincousa <mik...@gm...>]

I am not sure if I have the question right.

What I seek to do is plot an ellipse quadrant by quadrant.

Say the range from 0 to 90?

In explicit mode such as set object ellipse at 1,1 size 3,1.5 

then polar and parametric.

Simple code examples will be GREATLY appreciated.

The ultimate goal is wide curves (not pi driven), ones with low curvature.

Maybe there is a better way?

I looked for "plot arc" that search was not immediately productive, \
....but it's late...y'all know the rest, I'm sure.

Thanks, zzzzzzz




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Re: [Gnuplot-info] Generate table/matrix with test data

[theozh <th...@gm...>]

Thanks!
Learned again... I was not yet familiar with plot '+' and '++'
Now, it works as expected.

Re: [Gnuplot-info] Generate table/matrix with test data

[Ethan M. <eam...@gm...>]

On Mon, Aug 8, 2016 at 12:34 PM, theozh <th...@gm...> wrote:

>
> > Close.  But you haven't actually given it a nominal data source or
> > function to plot.  This should work:
> >
> >   set sample 5
> >   set table
> >   plot x using (rand(0)):(rand(0)):(rand(0)):(rand(0)):(rand(0)) with
> table
> >
> ...not yet. My gnuplot (V5.0 0) complains about the "using" as
>  "unexpected or unrecognized token"
>


Sorry.  Thinko/typo. That should have been

plot '+' using (rand(0)):(rand(0)):(rand(0)):(rand(0)):(rand(0)) with table

Re: [Gnuplot-info] Generate table/matrix with test data

[theozh <th...@gm...>]

> Close.  But you haven't actually given it a nominal data source or
> function to plot.  This should work:
> 
>   set sample 5
>   set table
>   plot x using (rand(0)):(rand(0)):(rand(0)):(rand(0)):(rand(0)) with table
> 
...not yet. My gnuplot (V5.0 0) complains about the "using" as
 "unexpected or unrecognized token"

Re: [Gnuplot-info] Generate table/matrix with test data

[Ethan M. <eam...@gm...>]

On Mon, Aug 8, 2016 at 12:22 AM, theozh <th...@gm...> wrote:

> sometimes it's helpful to generate some test or dummy data.
>
> I hoped that I can create some test data (columns and/or matrices) with
> "set table".
>

Sure


> For example, I expected the following code to produce a 5x5 matrix of
> random data.
>
> reset
> set samples 5
> set table "Test.dat"
> plot rand(0):rand(0):rand(0):rand(0):rand(0) with table
>

Close.  But you haven't actually given it a nominal data source or
function to plot.  This should work:

  set sample 5
  set table
  plot x using (rand(0)):(rand(0)):(rand(0)):(rand(0)):(rand(0)) with table

   Ethan

Re: [Gnuplot-info] How to simply get contour or surface plot form datafile?

[theozh <th...@gm...>]

although there are a few examples at
http://gnuplot.sourceforge.net/demo/

I still find it pretty confusing
about plot, splot, matrix, with image, surface plot, contour plot or
2D/3D heatmap...

Anyway, to my understanding if you have data which is not in a regular
matrix, i.e. "non-gridded data" you first need to convert the data into
a regular grid (see "set dgrid3d").
See example: non-gridded data


Maybe the following code helps you?
The file "RandomMesh.dat" consist of 3 columns with x y z data, so
similar to your data.


####### Plot arbitrary mesh data
reset

set view map
set dgrid3d 30,30,10
set palette rgbformulae 33,13,10

set multiplot layout 1,2

set surface
unset contour
splot "RandomMesh.dat" w pm3d

unset surface
set contour
set cntrparam levels 10
splot "RandomMesh.dat" w pm3d

unset multiplot
####### EOF

Re: [Gnuplot-info] Generate table/matrix with test data

[theozh <th...@gm...>]

Thanks a lot thse!
Ah, so easy!
Sorry, haven't thought about the "obvious" print function.

Re: [Gnuplot-info] Generate table/matrix with test data

[thse <t.s...@fz...>]

if you want an simple table use the "sprintf" function to generate
one line and then "print" it:

reset
n=1000
set print "Test.dat"
do for [i=1:n] {
   tmp = ""
   do for [j=1:n] {
      tmp = tmp.sprintf("%1.2f\t",rand(0))      
   }
   print tmp
}
unset print




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[Gnuplot-info] Generate table/matrix with test data

[theozh <th...@gm...>]

sometimes it's helpful to generate some test or dummy data.

I hoped that I can create some test data (columns and/or matrices) with
"set table".

Is there a way to generate N-column or M x N-matrix random data?
e.g. like
0.10 0.45 0.91 0.50 0.55
0.57 0.19 0.74 0.28 0.06
0.85 0.09 0.27 0.27 0.80
0.08 0.31 0.08 0.66 0.43
0.77 0.80 1.00 0.14 0.50

For example, I expected the following code to produce a 5x5 matrix of
random data.

reset
set samples 5
set table "Test.dat"
plot rand(0):rand(0):rand(0):rand(0):rand(0) with table
# or maybe
# plot rand(0),rand(0),rand(0),rand(0),rand(0) with table
# or "splot ... something"
unset table

But this seems not to work like this.
I also tried "set parametric" like in the "random-demos"...


While fiddling around I found that the following code would create such
a 5x5 matrix:

####### generate 5x5 matrix of random numbers
reset
$Data <<EOD
1 1
2 1
3 1
4 1
5 1
EOD

set table "Test.dat"
plot $Data using \
($2*rand(0)):($2*rand(0)):($2*rand(0)):($2*rand(0)):($2*rand(0)) \
with table

unset table
####### EOF


Two questions:

1)
How would I do this for a 1000x1000 matrix?
Repeating ($2*rand(0)) a thousand times...???

2)
Ideally, I also wanted the data to be separated by TAB instead of space.
So, if I additionally set in the above working code

 set datafile separator "\t"

I get the error message:  "...x range is invalid"


Any ideas?

Re: [Gnuplot-info] Interactive user input with gnuplot

[theozh <th...@gm...>]

thanks, Joseph, for that hint.
Actually, my hope was to realize this in gnuplot itself and to avoid an
additional program and installation. Nevertheless, I will have a look at
it...

Re: [Gnuplot-info] Canvas / plot size confusion

[theozh <th...@gm...>]

Make sure you're using the newest gnuplot version.
If you read "help size" carefully you will see that size of the plot is
in relative units to the size of the canvas.
This apparently was different in older gnuplot versions and/or terminals.

reset
set terminal pdfcairo size 17in,11in
set output "test.pdf"
# calculate the ratio of 8in to 17in and 10in to 11in
# need to add . to force floating point division
set size 8/17.,10/11.
plot x**2
unset output

[Gnuplot-info] Canvas / plot size confusion

[mikeincousa <mik...@gm...>]

It all sounds so simple and easy, so I must be missing something somewhere.

What I want to do is place a full scale 8 x 10 inch plot on tabloid sized
paper.

1
gnuplot> reset
gnuplot> unset autoscale
gnuplot> set terminal pdfcairo size 17in,11in #landscape
Terminal type set to 'pdfcairo'
Options are ' transparent enhanced fontscale 0.5 size 17.00in, 11.00in '
gnuplot> set output "test.pdf"
gnuplot> set size 8in,10in
                   ^
         unexpected or unrecognized token

gnuplot> plot x**2
gnuplot> unset output

2.
set size ratio 8in,10in
#returns a 10 x 10 square

3.
set size nosquare 8in,10in
                   ^
         unexpected or unrecognized token

4. and on and on....




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Re: [Gnuplot-info] Arrow Heads Only, No shaft

[theozh <th...@gm...>]

if the arrow length is reduced to small values towards zero the arrow
head is also changing. Actually, I would have expected that the arrow
heads stay always the same. But they are not as you can easily check
with the following code.

####### Test arrows
reset
set xrange[0:20]
set yrange[0:3]
do for [i=1:20] {
  set arrow 3*i from i,0 to i,i/50.
  set arrow 3*i+1 from i,1 to i,1+i/50. head size 1,15,45 filled
  set arrow 3*i+2 from i,2 length i/10. angle 90 head size 1,15,45 filled
}
plot 0 notitle
######


I guess that's not want you wanted for your arrow heads?!


So, I thought arrow heads can also be created by polygons.

set object 1 polygon from x1,y1 to x2,y2 to ... to x1,y1

The following code is a "workaround" just for fun...
It looks (and maybe is) complicated but basically it's just a few
coordinate transformations.
The necessary input parameters for the arrow heads are the following:

 ax = 0    # x-value in x1-axis coordinates arrow head points to
 ay = 0    # y-value in y1-axis coordinates arrow head points to
 AA = 45   # ArrowAngle
 HL = 0.05 # HeadLength in fractions of screen width
 HA = 15   # HeadAngle
 BA = 45   # BackAngle

There might be certainly a more elegant way to do it.
Hope there is no bug in it, but it worked for me on a wxt terminal.
The size and shape of the arrow heads do do not depend on the graph
scale but just on the screen.

####### Test_Arrow2.plt
####### Arrow heads without shaft realized with polygons
reset
set xrange[-10:10]
set yrange[-10:10]
set size square
set angle degrees

# needs to plot something to update the range and GPVAL_ values?!
plot 0 notitle

# setting of arrow parameters
 ax = 0    # x-value in x1-axis coordinates arrow head points to
 ay = 0    # y-value in y1-axis coordinates arrow head points to
 AA = 45   # ArrowAngle
 HL = 0.05 # HeadLength in fraction of screen width
 HA = 15   # HeadAngle
 BA = 45   # BackAngle

# define a few coordinate functions
 aFracX(xx) = (xx - GPVAL_X_MIN) / ((GPVAL_X_MAX - GPVAL_X_MIN))
 aFracY(yy) = (yy - GPVAL_Y_MIN) / ((GPVAL_Y_MAX - GPVAL_Y_MIN))
 aFracScrX(xx)= (GPVAL_TERM_XMIN + aFracX(xx)\
   *(GPVAL_TERM_XMAX - GPVAL_TERM_XMIN))/GPVAL_TERM_XSIZE
 aFracScrY(yy) = (GPVAL_TERM_YMIN + aFracY(yy)\
   *(GPVAL_TERM_YMAX - GPVAL_TERM_YMIN))/GPVAL_TERM_YSIZE

# necessary to scale with aspect ratio of terminal
# +0.0 to force floating point divison
 AAspect = GPVAL_TERM_XSIZE / (GPVAL_TERM_YSIZE +0.0)

# more coordinate transformation functions
 a1x(ax,AA,HL,HA) = aFracScrX(ax) + HL/cos(HA)*cos(180-HA+AA)
 a1y(ay,AA,HL,HA) = aFracScrY(ay) + HL/cos(HA)*sin(180-HA+AA)*AAspect
 a2x(ax,AA,HL,HA,BA) = aFracScrX(ax) + HL\
   *(1-tan(HA)/tan(BA))*cos(180+AA)
 a2y(ay,AA,HL,HA,BA) = aFracScrY(ay) + HL\
   *(1-tan(HA)/tan(BA))*sin(180+AA)*AAspect
 a3x(ax,AA,HL,HA) = aFracScrX(ax) + HL/cos(HA)*cos(180+HA+AA)
 a3y(ay,AA,HL,HA) = aFracScrY(ay) + HL/cos(HA)*sin(180+HA+AA)*AAspect


# here comes the loop to create a few arrow heads
do for [i=1:8] {
 AA = i*45 # ArrowAngle 0° points to the right

 ax = 8*cos(i*45)
 ay = 8*sin(i*45)

 set object i polygon \
    from screen aFracScrX(ax),aFracScrY(ay) \
	to screen a1x(ax,AA,HL,HA),a1y(ay,AA,HL,HA) \
	to screen a2x(ax,AA,HL,HA,BA),a2y(ay,AA,HL,HA,BA) \
	to screen a3x(ax,AA,HL,HA),a3y(ay,AA,HL,HA) \
	to screen aFracScrX(ax),aFracScrY(ay) \
	fillstyle solid fc rgb "red"
}

# plot something to visualize the objects
 plot 0 notitle
####### EOF

Re: [Gnuplot-info] Arrow Heads Only, No shaft

[Ethan M. <eam...@gm...>]

Note that arrows can now (version 5) be specified in the form:

    set arrow {<tag>} from <position> length <coord> angle <ang>

This is particularly useful for the case at hand.

On Fri, Aug 5, 2016 at 10:44 AM, BBands <bb...@gm...> wrote:

> You can make a really short arrow, this one points to the upper right:
>
> set arrow from 0.98,0.98 to 1,1
>
> See 'help arrow" to format it to suit.
>
>     John
>
> On Thu, Aug 4, 2016 at 6:35 PM, mikeincousa <mik...@gm...> wrote:
>
> > Is there some way to create a arrow head without the shaft?
> >
> > If so can it be rotated so it points to N, S, E, and W directions?
> >
> > If not any work arounds?
> >
> > There is some discussion of this in earlier versions, but I could not
> find
> > anything current.
> >
> ------------------------------------------------------------
> ------------------
> _______________________________________________
> gnuplot-info mailing list
> gnu...@li...
> Membership management via: https://lists.sourceforge.net/
> lists/listinfo/gnuplot-info
>

Re: [Gnuplot-info] Arrow Heads Only, No shaft

[BBands <bb...@gm...>]

You can make a really short arrow, this one points to the upper right:

set arrow from 0.98,0.98 to 1,1

See 'help arrow" to format it to suit.

    John

On Thu, Aug 4, 2016 at 6:35 PM, mikeincousa <mik...@gm...> wrote:

> Is there some way to create a arrow head without the shaft?
>
> If so can it be rotated so it points to N, S, E, and W directions?
>
> If not any work arounds?
>
> There is some discussion of this in earlier versions, but I could not find
> anything current.
>

[Gnuplot-info] Arrow Heads Only, No shaft

[mikeincousa <mik...@gm...>]

Is there some way to create a arrow head without the shaft?

If so can it be rotated so it points to N, S, E, and W directions?

If not any work arounds?

There is some discussion of this in earlier versions, but I could not find
anything current.





--
View this message in context: http://gnuplot.10905.n7.nabble.com/Arrow-Heads-Only-No-shaft-tp20297.html
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Re: [Gnuplot-info] rotate labels by data column

[Ethan M. <eam...@gm...>]

On Thu, Aug 4, 2016 at 4:28 AM, Grothausmann, Roman Dr. <
gro...@mh...> wrote:

> Many thanks Ethan for the quick implementation. Works great and has no
> problems with SVGs:
> https://github.com/romangrothausmann/KursgleicheNG/blob/484c
> 11347d2bee7ad3c7503e5126d5d79f01a32a/windrose.gp
>
> Comparing the vector arrow heads and the label placement in my test
> project, reveals a slight displacement for 180° rotations which decreases
> in both directions towards 0°/360°. I wasn't able to compensate these with
> offsets.
>


That is probably due to imperfect vertical centering in the svg terminal
output.   The various gnuplot terminals are not consistent in placing
vertically-centered text; some align to the text baseline, some to the
midline, and some to whatever is possible. I suspect the svg terminal could
do a better job than it currently does.

   Ethan


>
> Thanks again for the quick feature implementation.
>
> On 03/08/16 22:32, Ethan Merritt wrote:
>
>> I like the idea, and it requires only a trivial amount of code, so...
>> in today's CVS (version 5.1)
>>
>>     http://gnuplot.sourceforge.net/demo_cvs/rotate_labels.html
>>
>> using theozh's test data:
>>
>>  plot $Data using 1:2:3:4 with labels rotate variable
>>
>>
>> Ethan
>>
>> On Tue, Aug 2, 2016 at 12:07 AM, Grothausmann, Roman Dr.
>> <gro...@mh... <mailto:grothausmann.roman@mh-
>> hannover.de>>
>> wrote:
>>
>>     Dear mailing list members,
>>
>>
>>     Is there any way to plot labels rotated according to angles given by
>> a data
>>     column?
>>     All I could find is:
>>     plot ... with labels rotate by X
>>     which, as I understand, only allows a fixed rotation for all labels.
>>
>>     Any help or hints are very much appreciated
>>     Roman
>>
>>     ------------------------------------------------------------
>> ------------------
>>     _______________________________________________
>>     gnuplot-info mailing list
>>     gnu...@li... <mailto:gnu...@li...
>> rceforge.net>
>>     Membership management via:
>>     https://lists.sourceforge.net/lists/listinfo/gnuplot-info
>>
>>
>>
>>

Re: [Gnuplot-info] rotate labels by data column

[Grothausmann, R. Dr. <gro...@mh...>]

Many thanks Ethan for the quick implementation. Works great and has no problems 
with SVGs:
https://github.com/romangrothausmann/KursgleicheNG/blob/484c11347d2bee7ad3c7503e5126d5d79f01a32a/windrose.gp

Comparing the vector arrow heads and the label placement in my test project, 
reveals a slight displacement for 180° rotations which decreases in both 
directions towards 0°/360°. I wasn't able to compensate these with offsets.

Thanks again for the quick feature implementation.

On 03/08/16 22:32, Ethan Merritt wrote:
> I like the idea, and it requires only a trivial amount of code, so...
> in today's CVS (version 5.1)
>
>     http://gnuplot.sourceforge.net/demo_cvs/rotate_labels.html
>
> using theozh's test data:
>
>  plot $Data using 1:2:3:4 with labels rotate variable
>
>
> Ethan
>
> On Tue, Aug 2, 2016 at 12:07 AM, Grothausmann, Roman Dr.
> <gro...@mh... <mailto:gro...@mh...>>
> wrote:
>
>     Dear mailing list members,
>
>
>     Is there any way to plot labels rotated according to angles given by a data
>     column?
>     All I could find is:
>     plot ... with labels rotate by X
>     which, as I understand, only allows a fixed rotation for all labels.
>
>     Any help or hints are very much appreciated
>     Roman
>
>     ------------------------------------------------------------------------------
>     _______________________________________________
>     gnuplot-info mailing list
>     gnu...@li... <mailto:gnu...@li...>
>     Membership management via:
>     https://lists.sourceforge.net/lists/listinfo/gnuplot-info
>
>

Re: [Gnuplot-info] rotate labels by data column

[Grothausmann, R. Dr. <gro...@mh...>]

Many thanks theozh! The way of assigning values from data to variables through 
empty plot commands was completely new to me. It works great for wxt 
(https://github.com/romangrothausmann/KursgleicheNG/blob/8c9eb5c69e77da7e9102beefa8c139d409717719/windrose.gp), 
but even though SVG supports rotated labels, the "empty plots" cause SVG 
end-tags for groups that have no start-tag which results in invalid SVGs. Is 
that expected?

On 02/08/16 23:04, theozh wrote:
> well, you could do it with setting labels...
>
> However, the example below is a bit a cumbersome workaround, but it
> seems to do the job in a wxt terminal.
> - the first data column is used to define the position
> - the second data column gives the label text
> - the third data column defines the rotation
> The first 3 plot command are not plotting anything but extracting
> numbers and text into the variables a,b,c.
>
> Hope this helps...
> Maybe there is a more elegant version?
>
>
> reset
>
> $Data <<EOD
> 1 one -30
> 2 two -60
> 3 three -90
> 4 four -120
> 5 five -150
> 6 six -180
> 7 seven -210
> 8 eight -240
> 9 nine -270
> 10 ten -300
> 11 eleven -330
> 12 twelve -360
> EOD
>
> set xrange [0:10]
> set yrange [0:10]
> set size square
> unset xtics
> unset ytics
> n = 12.   # . for floating point division
> set angles degrees
> do for [i=1:n] {
>   plot $Data u 1:(a=$1,0/0) every 1:1:i-2:0:i-1:0 notitle;
>   plot $Data u 1:(b=stringcolumn(2),0/0) every 1:1:i-2:0:i-1:0 notitle;
>   plot $Data u 1:(c=$3,0/0) every 1:1:i-1:0:i-1:0 notitle;
>   set label i center at (5+5*cos(-i/n*360+90)),(5+5*sin(-i/n*360+90))\
> sprintf("%s",b) rotate by c font "Arial,20";
>   }
>
>   plot $Data u 1:1 notitle     # or whatever else you need to plot
>