gnuplot-info — For questions and discussion about gnuplot

Re: [Gnuplot-info] PlottingArrays

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

On Friday, 16 September 2022 05:21:16 PDT Geoff Kaniuk wrote:
> Thank you all for the swift replies. This made me realise that my 
> looped plot example produces separate plots for each array, but I wanted 
> all curves in 1 plot.
> 
> Using the eval clue I have come up with a solution looking like this:
> 
> STEP1. create a function curves(n)
> 	to generate the string  "ab1 w lp, ab2 w lp"
> 	( I wonder if this what Alan Corey meant by search & replace)
> 
> STEP2.
> 	curves = curves(2)
> 	plotcurves = "plot ".curves
> 	eval(plotcurves)
> 
> Using sprintf to get plotcurves also worked. One slight issue is that I 
> had missed a space after the comma separating the plot elements. So  the 
> generated string  "ab1 w lp,ab2 w lp" failed, with plot trying to treat 
> it as the name of a single file. However plot ab1 w lp,ab2 w lp is fine.
> 	
> Although this is a solution for a handful of arrays, is this really the 
> only way?

I don't think you can do better than that in version 5.2.

The development version of gnuplot supports a larger set of array
operations including treating them as unitary variables for the
purpose of passing an array to, or returning an array from, a function.

Here is a script that works in 5.5 but not in 5.2:

###
array ab1 = [1,1,1]
array ab2 = [2,2]
array ab5 = [5,5]
array ab67 = [67,67]
list = ""
do for [i = 1:99] {
    name = sprintf("ab%d",i)
    if (exists(name)) {
        list = list." ".name
    }
}
print "Now I will plot: ", list
plot for [name in list] value(name) with lp
###

Version 5.2 understands what that script attempts to do but
prints an error "unsupported array operation".

	Ethan

Re: [Gnuplot-info] PlottingArrays

[Geoff K. <ge...@ka...>]

Thank you all for the swift replies. This made me realise that my 
looped plot example produces separate plots for each array, but I wanted 
all curves in 1 plot.

Using the eval clue I have come up with a solution looking like this:

STEP1. create a function curves(n)
	to generate the string  "ab1 w lp, ab2 w lp"
	( I wonder if this what Alan Corey meant by search & replace)

STEP2.
	curves = curves(2)
	plotcurves = "plot ".curves
	eval(plotcurves)

Using sprintf to get plotcurves also worked. One slight issue is that I 
had missed a space after the comma separating the plot elements. So  the 
generated string  "ab1 w lp,ab2 w lp" failed, with plot trying to treat 
it as the name of a single file. However plot ab1 w lp,ab2 w lp is fine.
	
Although this is a solution for a handful of arrays, is this really the 
only way?

Geoff
33 Ashbury Close, Cambridge CB1 3RW 01223 710582

On 15/09/2022 21:37, Ethan Merritt wrote:
> On Thursday, 15 September 2022 11:06:44 PDT Geoff Kaniuk wrote:
>> Dear gnuplot,
>>
>> I would like to plot a sequence of arrays.
>>
>> For example, I have a script:
>>
>> plot-arrays.gp
>> # TEST PLOT ARRAYS
>> reset session
>>
>> array ab1[3] = [ 1.1, 1.2, 1.3 ]
>> array ab2[3] = [ 2.1, 2.2, 2.3 ]
>>
>> plot ab1 w lp, ab2 w lp
>>
>> abname(i)=sprintf("%s%d", "ab", i)
>>
>> do for [k=1:2]{ abk = abname(k); plot abk w lp }
>> # END
>>
>> The first plot command works fine. But I have a large number of such
>> arrays and would like to proceed as in the second looped command.
> 
> See "help eval".
> You want something like this
> 
>    do for [k=1:N] {
>      command = sprintf("plot ab%d w lp", k)
>      eval(command);
>    }
> 
> 	Ethan
> 
> 
> 

Re: [Gnuplot-info] PlottingArrays

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

On Thursday, 15 September 2022 11:06:44 PDT Geoff Kaniuk wrote:
> Dear gnuplot,
> 
> I would like to plot a sequence of arrays.
> 
> For example, I have a script:
> 
> plot-arrays.gp
> # TEST PLOT ARRAYS
> reset session
> 
> array ab1[3] = [ 1.1, 1.2, 1.3 ]
> array ab2[3] = [ 2.1, 2.2, 2.3 ]
> 
> plot ab1 w lp, ab2 w lp
> 
> abname(i)=sprintf("%s%d", "ab", i)
> 
> do for [k=1:2]{ abk = abname(k); plot abk w lp }
> # END
> 
> The first plot command works fine. But I have a large number of such 
> arrays and would like to proceed as in the second looped command.

See "help eval".
You want something like this

  do for [k=1:N] {
    command = sprintf("plot ab%d w lp", k)
    eval(command);
  }

	Ethan

[Gnuplot-info] PlottingArrays

[Geoff K. <ge...@ka...>]

Dear gnuplot,

I would like to plot a sequence of arrays.

For example, I have a script:

plot-arrays.gp
# TEST PLOT ARRAYS
reset session

array ab1[3] = [ 1.1, 1.2, 1.3 ]
array ab2[3] = [ 2.1, 2.2, 2.3 ]

plot ab1 w lp, ab2 w lp

abname(i)=sprintf("%s%d", "ab", i)

do for [k=1:2]{ abk = abname(k); plot abk w lp }
# END

The first plot command works fine. But I have a large number of such 
arrays and would like to proceed as in the second looped command.

But as things stand, the variable abk is treated as a file name and I 
get the message:
gnuplot> call "plot-arrays.gp"
   "plot-arrays.gp" line 11: warning: Cannot find or open file "ab1"
   "plot-arrays.gp" line 11: No data in plot

I have experimented with macro substitution but not made any progress.

Is it possible to plot an array sequence?

I am using gnuplot 5.2 patchlevel 6, running under Debian Buster

-- 
Geoff

33 Ashbury Close, Cambridge CB1 3RW 01223 710582

[Gnuplot-info] Question: creation date of the "gnuplot license"

[Valerio B. <ns...@su...>]

Hi activists of gnuplot,

I'm a Wikidata volunteer and I'm trying to plot software licenses on a
timeline. Weird example:
https://w.wiki/5fr4

The only info that I'm missing is:
When was the "gnuplot license" first invented / published?

Do you know the date?

Then:

Can you be so kind to write this information somewhere on your website,
in order to link that as source?

Thank you so much for your help!

-boz

-- 
[[User:Valerio Bozzolan]]


E-mail sent from Evolution from a random GNU/Linux distribution,
delivered from my Postfix mailserver.

Have fun with software freedom!

Re: [Gnuplot-info] array (ab)use case

[Emanuel B. <in...@da...>]

Jeremy Nicoll - ml gnuplot wrote:

> I'm not sure if you got the point I was trying to make.
>
> If someone tries to read through your older posts following
> the successive changes you made to your code, they cannot
> see all the different pictures that you made, because each
> newer one overwrote the older ones.
>
> I'm happy that you managed to get the graph looking how you
> wanted, but sad that the process isn't so easy for other
> people to understand.

I understood, don't know if this qualifies as a real problem
tho, but if and when I do this again I'll maybe use a filename
scheme so that

  plot-revenge-2022-07-22.png

would indicate today's version.

-- 
underground experts united
https://dataswamp.org/~incal

Re: [Gnuplot-info] array (ab)use case

[Jeremy N. - ml g. <jn....@wi...>]

On 2022-07-11 09:40, Norwid Behrnd via gnuplot-info wrote:
> Jeremy Nicoll wrote:
> 
>> If someone tries to read through your older posts following the
>> successive changes you made to your code, they cannot see all
>> the different pictures that you made, because each newer one
>> overwrote the older ones.

> @Jeremy
> My interpretation of you reply is you recommend snippets of code
> shared here should be both complete as in «all the relevant
> instructions to demonstrate the issue» .and. self sufficient for
> a test run, i.e. to include a minimal set of data to process.  In
> other words, to include gnuplot's datablocks (`$data`) as in e.g.,
> 
> ```gnuplot script
> $data << EOD ...


Yes!

I presume that gnuplot's output isn't meant to vary much across
different OSes, but presumably there can be platform differences
not least in the fonts available.  So although in theory anyone
can test someone-else's code on their own system, it might not
follow that weird results that one person gets will also happen
for everyone else.

That's why I thought that if URLs are given to an OP's image(s)
it would be better if different images had different URLs.

-- 
Jeremy Nicoll - my opinions are my own

Re: [Gnuplot-info] array (ab)use case

[Norwid B. <nb...@ya...>]

Jeremy Nicoll wrote:

> If someone tries to read through your older posts following the
> successive changes you made to your code, they cannot see all
> the different pictures that you made, because each newer one
> overwrote the older ones.

@Jeremy
My interpretation of you reply is you recommend snippets of code
shared here should be both complete as in «all the relevant
instructions to demonstrate the issue» .and. self sufficient for a
test run, i.e. to include a minimal set of data to process.  In other
words, to include gnuplot's datablocks (`$data`) as in e.g.,

```gnuplot script
$data << EOD
1 2
2 4.5
3 3
4 -1.2
5 0
EOD

set terminal pngcairo
set output "test.png"
set grid
plot "$data" w lp pt 2 lc "blue" title "par example"
```

or, considering only a dozen of records of Emanuel's log

```gnuplot script
$data << EOD
11814601 737184 610310 13198 4223 1885
11830440 737790 611265 13295 4239 1904
11846530 739535 612274 13396 4264 1918
11861902 742324 613332 13513 4285 1931
11877902 743061 614346 13551 4301 1992
11894437 744473 615366 13609 4318 2290
11910270 745453 616369 13731 9014 4356
11925807 745957 617127 13840 9725 4372
11941696 746489 617887 13952 10055 4387
11958357 748936 618940 14061 10281 4425
11975490 749952 619995 14129 10342 4440
EOD

set term png background rgb "black"
set out "check.png"

set tics font "verdana,10"

set format x "%s" timedate
set xtics 3,7
set xrange [1:] noextend

set format y "%.0s%c"
set logscale y
set yrange[1000:1e9]

set grid   lc "yellow"
set border lc "gray"

set key outside top right spacing 1.4 tc "white" font "verdana,10"
horizontal

array Cols = ["cyan", "magenta", "yellow", "green", "white", "red"]

data= "$data"
plot for [i=1:*] \
 data u ($0+1):i w l lc rgb Cols[(i % 6) + 1] lw 2 t columnhead
```

@moderators of the mailing list
Perhaps the suggest to include small datablocks to render MWE easier
to replicate could be included in one of the mails when subscribing to
the list.

Re: [Gnuplot-info] array (ab)use case

[Jeremy N. - ml g. <jn....@wi...>]

On 2022-07-10 04:30, Emanuel Berg wrote:
> Jeremy Nicoll - ml gnuplot wrote:
> 
>> When I post images for other people to view (not yet on this
>> list) I post them with date & time-stamped names & generally
>> leave them online for several years...
> 
> I saved one, have a look:
>   https://dataswamp.org/~incal/hits/hits-vfork.png
> 
> LOL
> 
> But the correct one now looks like this, I think its correct,
> looks cool, and is automated until 2023 at least :)
> 
>   https://dataswamp.org/~incal/hits/hits.png


I'm not sure if you got the point I was trying to make.

If someone tries to read through your older posts following the
successive changes you made to your code, they cannot see all
the different pictures that you made, because each newer one
overwrote the older ones.

I'm happy that you managed to get the graph looking how you
wanted, but sad that the process isn't so easy for other
people to understand.


-- 
Jeremy Nicoll - my opinions are my own

Re: [Gnuplot-info] array (ab)use case

[Emanuel B. <in...@da...>]

Jeremy Nicoll - ml gnuplot wrote:

> When I post images for other people to view (not yet on this
> list) I post them with date & time-stamped names & generally
> leave them online for several years...

I saved one, have a look:
  https://dataswamp.org/~incal/hits/hits-vfork.png

LOL

But the correct one now looks like this, I think its correct,
looks cool, and is automated until 2023 at least :)

  https://dataswamp.org/~incal/hits/hits.png

Or tell me what you think can be improved ...
I like forfinements. Err, "hit me"?

Source:

  https://dataswamp.org/~incal/emacs-init/piles.el
  https://dataswamp.org/~incal/hits/piles-all
  https://dataswamp.org/~incal/hits/hits.gpi

Re: [Gnuplot-info] array (ab)use case

[Jeremy N. - ml g. <jn....@wi...>]

On 2022-07-08 05:30, Emanuel Berg wrote:
> What happened to the colors? I'm using the array in an
> incorrect way.

> # this file:
> #   https://dataswamp.org/~incal/hits/hits.gpi
> #
> # the graph:
> #   https://dataswamp.org/~incal/hits/hits.png


Every time you post you seem to use the same URLs for the sample
data (which is maybe ok if it never changes) and image (which
presumably does change through your successive experiments).

But that means that someone reading through successive posts you
made cannot see what your successive images looked like, just
the most recent one.

Bear in mind that not everyone reading your posts will necessarily
read them on the day you post them.

When I post images for other people to view (not yet on this list)
I post them with date & time-stamped names & generally leave them
online for several years...

-- 
Jeremy Nicoll - my opinions are my own

Re: [Gnuplot-info] array (ab)use case

[Emanuel B. <in...@da...>]

hchiPer wrote:

> Add rgb befor the color name:
>
> plot for [i=1:*] \
>  data u ($0+1):i w l lc rgb Cols[(i % 6) + 1] lw 2
> t columnhead

Sweet, that did it! Merci!

  https://dataswamp.org/~incal/hits/hits.png

Re: [Gnuplot-info] array (ab)use case

[hchiPer <hc...@gm...>]

Add rgb befor the color name:

plot for [i=1:*] \
  data u ($0+1):i w l lc rgb Cols[(i % 6) + 1] lw 2 t columnhead

Le 8/07/22 à 06:30, Emanuel Berg a écrit :
> plot for [i=1:*] \
>   data u ($0+1):i w l lc Cols[(i % 6) + 1] lw 2 t columnhead

[Gnuplot-info] array (ab)use case

[Emanuel B. <in...@da...>]

What happened to the colors? I'm using the array in an
incorrect way.

#! /usr/local/bin/gnuplot
#
# this file:
#   https://dataswamp.org/~incal/hits/hits.gpi
#
# the graph:
#   https://dataswamp.org/~incal/hits/hits.png

reset
set term png background rgb "black"
set out "/home/incal/public_html/hits/hits.png"

set tics font "verdana,10"

set format x "%s" timedate
set xtics 3,7
set xrange [147:] noextend

set format y "%.0s%c"
set logscale y
set yrange[1000:1e9]

set grid   lc "yellow"
set border lc "gray"

set key outside top right spacing 1.4 tc "white" font "verdana,10" horizontal

array Cols = ["cyan", "magenta", "yellow", "green", "white", "red"]

data="/home/incal/public_html/hits/hits.dat"
plot for [i=1:*] \
 data u ($0+1):i w l lc Cols[(i % 6) + 1] lw 2 t columnhead

-- 
underground experts united
https://dataswamp.org/~incal

Re: [Gnuplot-info] EXT :Re: 12M? or 12 000 000? (not 12000000)

[Emanuel B. <in...@da...>]

Dave Horsfall wrote:

>> But actually IRC isn't dead at all, there are currently
>> 43 979 users globally (on 22 529 channels) on Libera.chat -
>> use the /motd command - Libera, which today is the IRC
>> network of the FOSS world.
>
> Thanks for all that info! I might give it a go.

To Emacs users and I'm sure they are quite a few here I can
recommend `erc' (for ERC, Emacs IRC) if anyone is unaware
of it.

Also built-in in vanilla GNU Emacs is `rcirc' which you get
with M-x irc RET. I have no experience from it but my friends
on gmane.emacs.help says it's good, and I believe them,
however ERC seems more common these days.

Here is a screenshot from ERC where a user is executing a bot
command to show ASCII art :) from the 90s, right?

  https://dataswamp.org/~incal/figures/fireworks-over-toronto.png

Re: [Gnuplot-info] EXT :Re: 12M? or 12 000 000? (not 12000000)

[Dave H. <da...@ho...>]

On Thu, 30 Jun 2022, Emanuel Berg wrote:

[...]

> But actually IRC isn't dead at all, there are currently 43 979 users 
> globally (on 22 529 channels) on Libera.chat - use the /motd command - 
> Libera, which today is the IRC network of the FOSS world.

Thanks for all that info!  I might give it a go.

-- Dave

Re: [Gnuplot-info] EXT :Re: 12M? or 12 000 000? (not 12000000)

[Emanuel B. <in...@da...>]

Dave Horsfall wrote:

>> I think this is a mistyping of IRC - Internet Relay Chat,
>> a chat tool that was used extensively by Noah but not so
>> much since the 17th century ?. Hence the "Ha-ha" comment
>> it received.
>
> Indeed

But actually IRC isn't dead at all, there are currently
43 979 users globally (on 22 529 channels) on Libera.chat
- use the /motd command - Libera, which today is the IRC
network of the FOSS world.

There are just 16 users on #gnuplot tho.

The most 10 most popular channels are 

  2078 #linux 
  1820 #libera 
  1776 #fedora 
  1606 #python                
  1491 #kde_ru                
  1401 #archlinux             
  1394 #archlinux-cn          
  1204 #archlinux-cn-offtopic 
  1002 #neovim                
   907 #ansible                

> unless the messages are archived then it's useless.

But that's super easy! The IRC clients can do logging so you
just do that and then rsync the logs to the web pile.

https://libera.chat/

-- 
underground experts united
https://dataswamp.org/~incal

Re: [Gnuplot-info] EXT :Re: 12M? or 12 000 000? (not 12000000)

[Dave H. <da...@ho...>]

On Wed, 29 Jun 2022, Peter Rockett via gnuplot-info wrote:

> I think the idea of a single mailing list probably reflects gnuplot's 
> age. Other projects I follow tend to have forums with multiple 
> categories like development, using blah-blah, and so on.

Only when they reach a certain threshold of topic divergence.

> FWIW: I think this mailing list is actually pretty quiet. This flurry of 
> activity on 12M or whatever is the first for quite some while.

It's about the quietest list I'm on (and I'm on lots); it's just that it 
wakes up every now and then, and should a newbie then join...

> I think this is a mistyping of IRC - Internet Relay Chat, a chat tool 
> that was used extensively by Noah but not so much since the 17th century 
> ?. Hence the "Ha-ha" comment it received.

Indeed; unless the messages are archived then it's useless.

-- Dave

Re: [Gnuplot-info] EXT :Re: 12M? or 12 000 000? (not 12000000)

[Peter R. <p.r...@sh...>]

On 29/06/2022 15:12, Jeremy Nicoll - ml gnuplot wrote:
> On 2022-06-28 16:07, Glenn Golden wrote:
>
>> Imo, yes.  I would like to respectfully suggest that this ongoing
>> tutorial discussion be relocated ...
>
> This sort of thing is normal on every other -users mail-list I'm
> on.
I think the idea of a single mailing list probably reflects gnuplot's 
age. Other projects I follow tend to have forums with multiple 
categories like development, using blah-blah, and so on.
>
>
>> It's pretty noisy and does not seem to contain much of general
>> interest that can't be glened from the docs.
FWIW: I think this mailing list is actually pretty quiet. This flurry of 
activity on 12M or whatever is the first for quite some while.
>
> As a newcomer to gnuplot, I'm finding it useful, because it gives
> me concrete things to try, to help me to understand gnuplot better.
>
> If no new user ever posts here, what sort of thing would you expect
> to see?
>
>
> Is IRQ (which I think means "interrupt request" - do you mean some
> sort of chat thing?) searchable in the same way that mail list
> archives tend to be?  If not, it's no use to anyone other than the
> participants at the instant in which a discussion takes place.

I think this is a mistyping of IRC - Internet Relay Chat, a chat tool 
that was used extensively by Noah but not so much since the 17th century 
😁. Hence the "Ha-ha" comment it received.

Peter

Re: [Gnuplot-info] EXT :Re: 12M? or 12 000 000? (not 12000000)

[Jeremy N. - ml g. <jn....@wi...>]

On 2022-06-28 16:07, Glenn Golden wrote:

> Imo, yes.  I would like to respectfully suggest that this ongoing
> tutorial discussion be relocated ...

This sort of thing is normal on every other -users mail-list I'm
on.


> It's pretty noisy and does not seem to contain much of general
> interest that can't be glened from the docs.

As a newcomer to gnuplot, I'm finding it useful, because it gives
me concrete things to try, to help me to understand gnuplot better.

If no new user ever posts here, what sort of thing would you expect
to see?


Is IRQ (which I think means "interrupt request" - do you mean some
sort of chat thing?) searchable in the same way that mail list
archives tend to be?  If not, it's no use to anyone other than the
participants at the instant in which a discussion takes place.

-- 
Jeremy Nicoll - my opinions are my own

Re: [Gnuplot-info] EXT :Re: 12M? or 12 000 000? (not 12000000)

[Emanuel B. <in...@da...>]

Glenn Golden wrote:

> Imo, yes. I would like to respectfully suggest that this
> ongoing tutorial discussion be relocated to IRQ or

IRQ haha :)

> It's pretty noisy and does not seem to contain much of
> general interest [...]

This is the user ML or am I mistaken?
gmane.comp.graphics.gnuplot.user

-- 
underground experts united
https://dataswamp.org/~incal

Re: [Gnuplot-info] EXT :Re: 12M? or 12 000 000? (not 12000000)

[Glenn G. <gd...@zp...>]

On Tue, Jun 28, 2022, at 08:52, Emanuel Berg wrote:
> Balick, Rebekah C [US] (ES) wrote:
>
>> Can whomever is in charge of this email list take me off of
>> it? I have unsubscribed twice and followed the instructions
>> but I am still receiving emails. Please remove me from the
>> list. Thank you!
>
> ... was it _that_ bad?
>

Imo, yes.  I would like to respectfully suggest that this ongoing 
tutorial discussion be relocated to IRQ or elsewhere. It's pretty
noisy and does not seem to contain much of general interest that
can't be glened from the docs.

Just my 2c, not trying to start a fight. 

Re: [Gnuplot-info] EXT :Re: 12M? or 12 000 000? (not 12000000)

[Emanuel B. <in...@da...>]

Balick, Rebekah C [US] (ES) wrote:

> Can whomever is in charge of this email list take me off of
> it? I have unsubscribed twice and followed the instructions
> but I am still receiving emails. Please remove me from the
> list. Thank you!

... was it _that_ bad?

-- 
underground experts united
https://dataswamp.org/~incal

Re: [Gnuplot-info] EXT :Re: 12M? or 12 000 000? (not 12000000)

[Balick, R. C [U. (ES) <Reb...@ng...>]

Can whomever is in charge of this email list take me off of it? I have unsubscribed twice and followed the instructions but I am still receiving emails. Please remove me from the list. Thank you!

-----Original Message-----
From: Emanuel Berg <in...@da...> 
Sent: Monday, June 27, 2022 9:34 PM
To: gnu...@li...
Subject: EXT :Re: [Gnuplot-info] 12M? or 12 000 000? (not 12000000)

> I just read of columnhead, however that's still hard-coded (the number 
> of lines)

array Cols = ["cyan", "magenta", "yellow", "green", "white", "red"]

data="/home/incal/public_html/hits/hits.dat"
plot for [i=1:*] \
 data u ($0+1):i w l lc Cols[(i % 6) + 1] lw 2 t columnhead

OK, found the for loop (but the color array doesn't work).

If I remove the sort in the source file and have the program add the columnhead I think that will work (be automated) unless users are removed or added, right?

--
underground experts united
https://dataswamp.org/~incal



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Re: [Gnuplot-info] 12M? or 12 000 000? (not 12000000)

[Emanuel B. <in...@da...>]

> I just read of columnhead, however that's still hard-coded
> (the number of lines)

array Cols = ["cyan", "magenta", "yellow", "green", "white", "red"]

data="/home/incal/public_html/hits/hits.dat"
plot for [i=1:*] \
 data u ($0+1):i w l lc Cols[(i % 6) + 1] lw 2 t columnhead

OK, found the for loop (but the color array doesn't work).

If I remove the sort in the source file and have the program
add the columnhead I think that will work (be automated)
unless users are removed or added, right?

-- 
underground experts united
https://dataswamp.org/~incal