gnuplot-info — For questions and discussion about gnuplot

[Gnuplot-info] Fwd: Re: multiple plot lines with plot '-'

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

[Forgot to CC this to the list...]

On 16.05.2012 23:36, pl...@pi... wrote:

> Now the obvious technical solution would be to parse the whole plot line
> to work out what is needed and do it once.

No, because that simply wouldn't work.  You're overlooking the case that
the argument to functions like column() can, itself, depend on the data:

	plot '-' using 1:column($2)

I.e. we could inspect the plot command as much as we want, and still not
know which input columns to buffer.

Re: [Gnuplot-info] pdfcairo or pdf output font fails with Adobe Illustrator

[James C. <clo...@jh...>]

>>>>> "JC" == James Cloos <clo...@jh...> writes:

JC> That change is due to a request by the TeX community.

A bug report today reminded me that that change was made at the request
of psfrag users who were using inkscape to generate vector art.

-JimC
-- 
James Cloos <cl...@jh...>         OpenPGP: 1024D/ED7DAEA6

Re: [Gnuplot-info] Call variables from korn shell

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

use
set title "Profil of mean Temperature and Salinity ".system("printenv
MODEL")


tib07 wrote:
> 
> I call a gnuplot script in a korn shell script with ./mkplot.pg and I
> would like to give the name of the ploted model in title like : 
> set title "Profil of mean Temperature and Salinity !printenv MODEL"
> 
> but it doesn't work...
> 

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Re: [Gnuplot-info] pdfcairo or pdf output font fails with Adobe Illustrator

[James C. <clo...@jh...>]

>>>>> "AC" == Andres Cimmarusti <aci...@gm...> writes:

AC> I decided to wait till Debian testing would get the upgraded versions
AC> of cairo 1.12 and pango 1.30, which happened today. Not sure which one
AC> did the trick, but everything works as expected now. I'm assuming it
AC> was the updated pango.

Cairo is much more likely.

AC> I think the problem lies in this difference:

AC> BEFORE:
AC> AGCFOR+ArialMT                       CID TrueType      yes yes yes      5  0

AC> AFTER UPGRADE:
AC> $ pdffonts sample_plot.pdf
AC> name                                 type              emb sub uni object ID
------------------------------------ ----------------- --- --- --- ---------
AC> BNNLMS+ArialMT                       TrueType          yes yes yes      5  0
AC> MEXTZI+ArialMT                       CID TrueType      yes yes yes      6  0

That change is due to a request by the TeX community.  Certain tools
expect to find TeX strings in eps files; when the tools which generated
those eps file switched to cairo, that became much more difficult.  So
cairo was changed to embed anything which can fit in WinAnsi in a non-
CID font so that it can embed that text in ()-quoted strings instead of
using the <HEXHEXHEX> encoded strings which CID fonts require.

I suspect that the CMap objects also are different between 1.10 and 1.12,
and that *that* is the change which fixed your use case.

But that is only an hypothesis....

-JimC
-- 
James Cloos <cl...@jh...>         OpenPGP: 1024D/ED7DAEA6

Re: [Gnuplot-info] Displaying times (for xdata time) as local times rather than UTC

[Morten L. <mor...@no...>]

On 08-05-2012 10:26, Alain Knaff wrote:
 > Hello,
 >
 > By default, gnuplot displays times (with "set xdata time") as UTC.
 > Is there a way to tell gnuplot to display it as localtime?

I don't know if there is a time zone aware way of doing it, but I just 
add an offset (in seconds) to the time column, something like:

plot "mydatafile.dat" using (timecolumn(1) + 3600):2

- assuming the times are coming from a file.

Regards,
Morten

Re: [Gnuplot-info] pdfcairo or pdf output font fails with Adobe Illustrator

[Andres C. <aci...@gm...>]

Hi again

> If you can upgrade cairo to 1.12 (1.12.2 is current) that might help.

I decided to wait till Debian testing would get the upgraded versions
of cairo 1.12 and pango 1.30, which happened today. Not sure which one
did the trick, but everything works as expected now. I'm assuming it
was the updated pango.

I think the problem lies in this difference:

BEFORE:
$ pdffonts sample_plot.pdf
name                                 type              emb sub uni object ID
------------------------------------ ----------------- --- --- --- ---------
AGCFOR+ArialMT                       CID TrueType      yes yes yes      5  0

AFTER UPGRADE:
$ pdffonts sample_plot.pdf
name                                 type              emb sub uni object ID
------------------------------------ ----------------- --- --- --- ---------
BNNLMS+ArialMT                       TrueType          yes yes yes      5  0
MEXTZI+ArialMT                       CID TrueType      yes yes yes      6  0

Somehow, pango or cairo were not embedding the truetype 'type' that
Adobe Illustrator likes and thus it was seen as some unknown font.

The problem still exists in older versions of these libraries,
including the ones embedded in the windows gnuplot binaries. I tried
using gnuplot 4.6 for windows to replicate the problem and it happened
as well, so it's not a GNU/Linux centric problem.

Thanks for the help!

Best regards,

Andres Cimmarusti

Re: [Gnuplot-info] Call variables from korn shell

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

instead of
${MODEL}
you may use
system("printenv MODEL")
or
!printenv MODEL
or
`printenv MODEL`
depending on the context in which you are using the shell variable.


tib07 wrote:
> 
> Hello,
> I use gnuplot in a Korn-Shell script and I would called variables from my
> scipt to my plot like MODEL and YEAR. In korn-shell, I write ${MODEL} but
> how to do this in gnuplot?
> 
> Thanks!
> Thibault C. 
> 

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Re: [Gnuplot-info] Using splot

[<she...@be...>]

Thanks for your suggestions but I found the answer myself. One can use

  set datafile missing

to do what I want.

> Hello Gnuplot List
>
> I have a simple gnuplot script for plotting a 3d surface of data read from
> a file (named percent_diff.dat) that looks like this:
>
> set ticslevel 0.0
> unset hidden3d
> set xlabel "x"
> set ylabel "y"
> set mouse
> set nokey
> set size ratio 1
> set autoscale
> set palette gray
>
> splot 'percent_diff.dat' matrix with lines
>
>
> How can I plot the surface but not connect the surface lines when the
> value in the file is of some chosen value? Incidentally when the value in
> the file is a NAN then gnuplot automatically does what I want. But I would
> not want to rely on abusing this feature to get the plots I want.
>
> Thank you!
>
>
>
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[Gnuplot-info] Displaying times (for xdata time) as local times rather than UTC

[Alain K. <sou...@mi...>]

Hello,

By default, gnuplot displays times (with "set xdata time") as UTC.

Is there a way to tell gnuplot to display it as localtime?

Thanks,

Alain

Re: [Gnuplot-info] Line Type

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

As colors, points and line types are terminal dependent, I think that
test with an appropriate terminal type might be what you are looking
for.

    John

On Mon, May 7, 2012 at 8:58 AM, Benjie29 <pod...@gm...> wrote:
>
> IS there any command which can provide information on line patterns. I tried
> test but it does not help. I am interested to know for instance if I use
> line type 2 which line style will be used. One way is to plot the data and
> check it out but this is not smart way of working. I will appreciate if some
> pointers are provided.

[Gnuplot-info] Using splot

[<she...@be...>]

Hello Gnuplot List

I have a simple gnuplot script for plotting a 3d surface of data read from
a file (named percent_diff.dat) that looks like this:

set ticslevel 0.0
unset hidden3d
set xlabel "x"
set ylabel "y"
set mouse
set nokey
set size ratio 1
set autoscale
set palette gray

splot 'percent_diff.dat' matrix with lines


How can I plot the surface but not connect the surface lines when the
value in the file is of some chosen value? Incidentally when the value in
the file is a NAN then gnuplot automatically does what I want. But I would
not want to rely on abusing this feature to get the plots I want.

Thank you!

Re: [Gnuplot-info] set term table not valid in gnuplot version 4.4.3 and 4.6?

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

On 07.05.2012 10:55, Tait wrote:

> There is no table terminal. There is a "set" option to generate output
> as a table instead of the normal terminal output. This is "set table"
> and you can read about it with "help table". Although, perhaps table
> as a terminal would make more sense than the current system.

You got that backwards.  It _used_ to be "set term table", but for 
various reasons, it was changed to "set table" as of release 4.2.0 (five 
years old now).

[Gnuplot-info] Line Type

[Benjie29 <pod...@gm...>]

IS there any command which can provide information on line patterns. I tried
test but it does not help. I am interested to know for instance if I use
line type 2 which line style will be used. One way is to plot the data and
check it out but this is not smart way of working. I will appreciate if some
pointers are provided.
Thanks
Ben
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Re: [Gnuplot-info] set term table not valid in gnuplot version 4.4.3 and 4.6?

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

Thanks, Tait, I think I mistakenly remembered it to be "set term table" but
actually it is "set table". One thing is that it has on website

http://t16web.lanl.gov/Kawano/gnuplot/plot3d-e.html

which seems to me a pretty popular one for getting tips on using gnuplot,
has used "set term table" as an example, which has added up to my
confusion. Is there anything you might comment on?

Thanks again,

Sincerely,
Jon

On Mon, May 7, 2012 at 3:55 AM, Tait <gnu...@t4...> wrote:

> > Dear All,
> >
> > I try to use term table, but gnuplot complains the following,
> > ...
> > Can you help me solve this issue? I do need table terminal to help make
> > sure whether data extracted are the correct data to plot.
>
> There is no table terminal. There is a "set" option to generate output
> as a table instead of the normal terminal output. This is "set table"
> and you can read about it with "help table". Although, perhaps table
> as a terminal would make more sense than the current system.
>
>
>

Re: [Gnuplot-info] set term table not valid in gnuplot version 4.4.3 and 4.6?

[Tait <gnu...@t4...>]

> Dear All,
> 
> I try to use term table, but gnuplot complains the following,
> ...
> Can you help me solve this issue? I do need table terminal to help make
> sure whether data extracted are the correct data to plot.

There is no table terminal. There is a "set" option to generate output
as a table instead of the normal terminal output. This is "set table"
and you can read about it with "help table". Although, perhaps table
as a terminal would make more sense than the current system.

Re: [Gnuplot-info] Evaluate Column minima and maxima in the Script

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

after plotting one column you may use the variables
GPVAL_Y_MIN and GPVAL_Y_MAX, or
GPVAL_DATA_Y_MIN and GPVAL_DATA_Y_MAX
which contain the information you are interested in.


Benjie29 wrote:
> 
> Hi Users,
> I have many columns in a .dat file, where the minimum and maximum differs
> for each column. I want to know the minimum and maximum for each column so
> that I can set the axes limits in my script for plotting. Is there any way
> in GNU Plot which can automate this step. Currently, I find minima and
> maxima outside GNU Plot and set axes. This is time consuming and not
> efficient. Your help will be highly appreciated.
> My data looks like:
> # Sample data with one X and Y1, Y2..Yn
> #  X  Y1  Y2 
>     1   50  3
>     2  100  2
>     3   10   35
> 

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[Gnuplot-info] set term table not valid in gnuplot version 4.4.3 and 4.6?

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

Dear All,

I try to use term table, but gnuplot complains the following,

unknown or ambiguous terminal type; type just 'set terminal' for a list

I type in help set term and cannot find term table in the list. The version
of gnuplot for it is

G N U P L O T
        Version 4.4 patchlevel 3

I also checked on version 4.6 patchlevel 0, but still cannot find table
terminal.

Can you help me solve this issue? I do need table terminal to help make
sure whether data extracted are the correct data to plot.

Thanks,

Sincerely,
Jon

Re: [Gnuplot-info] pdfcairo or pdf output font fails with Adobe Illustrator

[James C. <clo...@jh...>]

>>>>> "AC" == Andres Cimmarusti <aci...@gm...> writes:

AC> I don't have access to InDesign, but I did try with Acrobat (reader
AC> and full version) and it works just fine. It's illustrator that
AC> doesn't work.

If you can upgrade cairo to 1.12 (1.12.2 is current) that might help.

Since Acrobat is happy with them, you might try having acrobat re-
generate the pdf and check whether illustrator is happy with that.
If it is, the difference between the two pdfs might help explain
why it doesn't like the cairo-1.10 generated pdfs.

-JimC
-- 
James Cloos <cl...@jh...>         OpenPGP: 1024D/ED7DAEA6

Re: [Gnuplot-info] pdfcairo or pdf output font fails with Adobe Illustrator

[Andres C. <aci...@gm...>]

> For some reason Illustrator ignores the ToUnicode CMAP which is included
> in the pdf.  Without that information is it unable to determine what
> character to use in place of each glyph.
>
> But that is just the mechanism; I don't know the reason behind it.
>
> It shouldn't have a problem with the CMap, though.  Text extraction works
> fine with yscale_vs_width.pdf, including the Greek.  Extraction also
> works with your earlier pdfs.  Acroread also is happy with the CMaps.
>
> If you have access to them, it would be interesting to know whether
> InDesign or (the full) Acrobat do any better than Illustrator on
> those pdfs.

I don't have access to InDesign, but I did try with Acrobat (reader
and full version) and it works just fine. It's illustrator that
doesn't work.

I just tried with gnuplot on windows. I figured there could be
something wrong with the Debian fonts or version of pango/cairo. But I
got the same problem! I won't even bother to attach the file.

Could this be a bug in gnuplot or pango? I've produced plots with
matlab before (using Arial) and Illustrator is happy with them. If
it's a bug, it's a very subtle one...

Re: [Gnuplot-info] pdfcairo or pdf output font fails with Adobe Illustrator

[James C. <clo...@jh...>]

>>>>> "AC" == Andres Cimmarusti <aci...@gm...> writes:

AC> Yes I do have [Arial] installed (I have installed the package
AC> ttf-mscorefonts-installer):

D'oh.  I entirely forgot about the mscorefonts-installer package....

>> Can you provide an example pdf from each terminal?

AC> Attached.

They both come from the pdfcairo terminal.  Gnuplot will autocomplete
terminal names, so if one asks for pdf but only pdfcairo is compiled in,
one gets pdfcairo.

AC> Correct me if I'm wrong,

No.  You reasoned correctly.

AC> but I feel the problem here maybe slightly different.

Having now seen the pdfs, your hypothesis is exacly correct.

AC> I'm using some greek symbols (for tau and mu in the y and x
AC> labels respectively) and I think gnuplot doesn't find these special
AC> letters in Arial so it chooses the other fonts to compensate.

I looked at the embedded fonts; the μ is from Vera and the τ from Deja.

AC> I see. So even now that I know Arial is included, it keeps failing. Is
AC> is because it says ArialMT? why would it say ArialMT in any case? (my
AC> script calls for plain Arial...unfortunately this is font of choice of
AC> my collaborators).

The MT is for Monotype, the foundry from which MS licensed Arial.
Illustrator shouldn't have a problem with that.  If you have
lcd-typetools installed, I'd bet that

otfinfo -p arial.ttf

will show that the font's PostScript Name is ArialMT.  otfinfo's -i
option should give additional info.

If Debian's mscorefonts-installer uses the fonts from:

http://corefonts.sourceforge.net/

then it should have mu and tau glyphs.  If you have it installed,

xfd -fa Arial

should show the glyphs supported by your version of Arial; you can use
lsof(8) or look in /proc/$(pidof xfd)/maps to confirm that is has loaded
the right font file.  If you [Next] to the 0x0300 page it should have
Hellenic glyphs.  I don't know why pango ignores those in favour of ones
from the Sans alias.

Do you run gnuplot in a utf-8 locale?  If not, that may be why.

If so, it could be a bug in the pdfcairo terminal.

I just tried (with cairo and gnuplot from their git repos) in en_US.UTF-8.
A simple plot:

set term pdf enh font 'Arial,16'
set out "myt.pdf"
set label "Ελλενικα"
plot sin(x)+2*cos(x)

resulted in Arial for the mu and tau:

:; pdffonts myt.pdf
name            type          encoding    emb sub uni object ID
--------------- ------------- ----------- --- --- --- ---------
OLTWPV+ArialMT  TrueType      WinAnsi     yes yes yes      5  0
NUXGAE+ArialMT  CID TrueType  Identity-H  yes yes yes      6  0

It looks like you either need to switch to a utf-8 locale or newer
version(s) of gnuplot and/or cairo.

-JimC
-- 
James Cloos <cl...@jh...>         OpenPGP: 1024D/ED7DAEA6

Re: [Gnuplot-info] pdfcairo or pdf output font fails with Adobe Illustrator

[James C. <clo...@jh...>]

>>>>> "AC" == Andres Cimmarusti <aci...@gm...> writes:

AC> I produce the plots on a GNU/Linux system, specifically Debian
AC> testing, using either the pdfcairo or pdf terminals. I set fonts
AC> to be Arial.

Do you have Arial installed?  You will have had to have done it
explicitly; Debian would not include that family.

Does the pdf embed the fonts?  pdffonts (from poppler or xpdf),
mupdfinfo (from mupdf) are good tools to confirm that.

Can you provide an example pdf from each terminal?

Because Arial is so prevalent, default installs of fontconfig include
configuration code to substitute other fonts should arial be unavailable.

It looks like you end up with DejaVu Sans and/or Bitstream Vera Sans in
the pdf files, but subset (only the glyphs actually used are included;
that is normal for pdf files).  That is why Illusrator complains.

Your alternate workflow probably doesn't embed fonts, just names.

-JimC
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James Cloos <cl...@jh...>         OpenPGP: 1024D/ED7DAEA6

[Gnuplot-info] pdfcairo or pdf output font fails with Adobe Illustrator

[Andres C. <aci...@gm...>]

Hi gnuplot users,

I've been experiencing this very annoying problem with some of the
plots I produce with gnuplot (happens on both 4.4.0 and 4.6.0).

I produce the plots on a GNU/Linux system, specifically Debian
testing, using either the pdfcairo or pdf terminals. I set fonts to be
Arial. They look great on any pdf viewer I've checked. Furthermore the
files open just fine in Inkscape and the font is properly detected as
Arial.

The nature of academic work requires cooperation. Some of these people
hold Adobe Illustrator in high regard and they use it extensively for
editing plots. Whenever I try opening my plots produced by gnuplot via
any of the above mentioned pdf terminals, in Illustrator (on a Windows
computer) it gives me an error saying that DejaVu Sans and Bitstream
Vera fonts cannot be found and they will be substituted by the closest
equivalent. Unfortunately the text becomes a bunch of squares with and
"X" in the middle.

This is very annoying. I can work around the problem using the
postscript terminal. The font of the eps files produced this way works
fine in Adobe Illustrator and other editors and viewers.
Does anyone understand the problem here and how to get around it
without having to use eps files?

I don't want to have to resort to eps files. I will give cairolatex a
try tomorrow and see if the situation improves. Any tips is welcome.

Cheers

Andres

Re: [Gnuplot-info] Time data format

[Telmerk <te...@gm...>]

Yes, many thanks,  I realized it after a few attempts! It works fine.
A.


2012/4/27 Hans-Bernhard Bröker <HBB...@t-...>:
> On 27.04.2012 16:14, agoniabogar wrote:
>>
>> 20.04.2012 15:28        27      25      24.2    0.22
>
>
>> set xdata time
>> set timefmt x "%d.%m.%Y %H:%M"
>> p "blabla.txt" u 1:2
>
>
> You almost certainly don't want to use column 2 in that specification ---
> that's the one holding the time, because you have a blank in your timefmt.
>  You want
>
>        plot "blabla.txt" u 1:3
>
> instead.

Re: [Gnuplot-info] the effect of latex type generation is not good

[walter h. <wh...@bf...>]

Am 23.04.2012 01:44, schrieb Jon:
> Thanks so much!
> 
> I didn't use too many types of terminals, but I do know there is reason why
> so many terminals are produced for use. Is there way to systematically
> introduce what these terminals are doing? Not to be too technical, but
> simply say, say, epslatex is to generate eps file for use with latex
> document, etc
> 
> Jon
> 


Terminals define the type of output you get. eg. "term postscript" will generate
a postscript file. please be aware that the terminal can have arguments attached.
from help term postscript:
     set terminal postscript {landscape | portrait | eps}
                               {enhanced | noenhanced}
                               {defaultplex | simplex | duplex}
                               {fontfile [add | delete] "<filename>"
                                | nofontfiles} {{no}adobeglyphnames}
                               {level1 | leveldefault}
                               {color | colour | monochrome}
                               {solid | dashed}
                               {dashlength | dl <DL>}
                               {linewidth | lw <LW>}
                               {rounded | butt}
                               {clip | noclip}
                               {palfuncparam <samples>{,<maxdeviation>}}
                               {size <XX>{unit},<YY>{unit}}
                               {blacktext | colortext | colourtext}
                               {{font} "fontname{,fontsize}" {<fontsize>}}

for more details read 'help terminal'
hope that helps,
re,
 wh

Re: [Gnuplot-info] Time data format

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

On 27.04.2012 16:14, agoniabogar wrote:
> 20.04.2012 15:28	27	25	24.2	0.22

> set xdata time
> set timefmt x "%d.%m.%Y %H:%M"
> p "blabla.txt" u 1:2

You almost certainly don't want to use column 2 in that specification 
--- that's the one holding the time, because you have a blank in your 
timefmt.  You want

	plot "blabla.txt" u 1:3

instead.