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Can I plot the data written in rows ?

Thanks

>At least two things did go wrong, actually.  First, you didn't notice 
>that I had assumed your data files are called *.dat, whereas yours are 
>actually called *.asc.

No, I did and changed it to *.asc; the point was the missing $1... and I had
to use zcat because gzcat was not installed and not in the repository but
the final result is just perfect! Thanks a lot! 

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pau wrote:
> Seemingly something went wrong. I got this kind of message:
> 
> gnuplot> plot "Splotch4_0010_part.asc.gif" using 3:4 with dots

At least two things did go wrong, actually.  First, you didn't notice 
that I had assumed your data files are called *.dat, whereas yours are 
actually called *.asc.

> #!/usr/bin/env zsh

> gnuplot <<EOF
>   set term gif
>   set output "$2"
>   plot "$2" using 3:4 with dots

And there are $2 in here, but no $1.  But there should be.

>   unset output
>   exit
> EOF
> 
> The result is a lot of empty gifs.
> 
> My data names are like "Splotch4_0012_part.asc.gz", and they span from
> Splotch4_0000_part.asc.gz
> to Splotch4_0500_part.asc.gz.

Second shot, this time in a single construct, which you can either type 
in verbatim or save as a script file:

for f in *.asc.gz ; do
   gif_file=`basename $f .asc.gz`.gif

   gnuplot <<EOF
     set term gif ; set output "$gif_file"
     plot "< gzcat $f" using 3:4 with dots
     unset output
EOF
done

Hi!

thanks a lot for the quick answer!

Seemingly something went wrong. I got this kind of message:

gnuplot> plot "Splotch4_0010_part.asc.gif" using 3:4 with dots
                                                              ^
         line 0: no data point found in specified file

And what I did is

elachistos| for f in *.asc ; do                                                                                      
/home/pau/temporal/FRED/PROVA/kkk.sh "$f" `basename $f .dat`.gif ;
done

where kkk.sh looks like

#!/usr/bin/env zsh
gnuplot <<EOF
  set term gif
  set output "$2"
  plot "$2" using 3:4 with dots
  unset output
  exit
EOF

The result is a lot of empty gifs.

My data names are like "Splotch4_0012_part.asc.gz", and they span from
Splotch4_0000_part.asc.gz
to Splotch4_0500_part.asc.gz.
Of course I gunzipped them before using your script... Is there a faster way
of coping with gzipped data?

Any hint?

in any case, thanks a lot!

BTW do you know how to combine the for blabla and put it into the kkk.sh
script?

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pau wrote:
> I know how to write a small script with all the gnuplot commands for a
> SINGLE data file but I don't know how to do this for 500 files...

By not doing it from inside gnuplot, but rather from the outside.  Use 
whatever scripting or programming language you like to print commands 
into gnuplot's standard input stream.  E.g. using Bourne shell as the 
scripting language, if you're on Unix, a HERE script would do most of 
the job:

--- myscript.sh ---
#! /bin/sh
gnuplot <<EOF
  set term gif
  set output "$2"
  plot "$2" using 3:4 with lines
  unset output
  exit
EOF

to be run as

	for f in *.dat ; do
	   /some/where/myscript.sh "$f" `basename $f .dat`.gif ;
         done

Hi,

I would like to make a lot of plots and don't know how.

I have a directory with about 500 data files with the same structure and I
want to plot always the same columns. I don't know how to make gnuplot  to
produce a, say, gif plot of the columns 3 and 4 of Splotch4_0380_part.asc.gz
(yes, it's gzipped!) and do the same for the rest of files (500 in total or
so)

Any hint?

I know how to write a small script with all the gnuplot commands for a
SINGLE data file but I don't know how to do this for 500 files...

thanks
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Constantine Nenkov wrote:
> Here is the result of me attempting to define a string variable:
> 
> ====================================================================================
> nenkov@convex$ gnuplot
> 
>         G N U P L O T
>         Version 4.0 patchlevel 0

Hold it right there.  That version never had string variable support. 
You need to have the current version to get string variables.  At this 
moment, your best plan might be wait a little until the next release. 
Or proceed to sourceforge.net and get the CVS sources.

No virus found in this outgoing message.
Checked by AVG Free Edition.
Version: 7.1.405 / Virus Database: 268.11.3/423 - Release Date: 8/18/2006

 plot '<sed "s/,/0  /g" yourdatafile' using 2:3 w l 

horatiu wrote:
> 
> (5 columns separated by comma)
> 
> , .5,-1.3016, 0, 0
> , 1,-1.3006, 0, 0
> , 1.5,-1.2996, 0, 0
> , 2,-1.2986, 0, 0
> , 2.5,-1.2976, 0, 0
> , 3,-1.2966, 0, 0
> , 3.5,-1.2956, 0, 0
> , 4,-1.2946, 0, 0
> , 4.5,-1.2936, 0, 0
> 
> Thanx a lot
> 

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Manish Goel wrote:

> I have to plot contours of the 3d-mesh (drawn actually by joining no. of 
> segments).  for this purpose I want to change my mesh(from multiple 
> small segments) into a single consolidated one so that by using "set 
> contour" I can draw the contours. 

It's unclear how you arrived at the data file you sent --- but it seems 
you ran off in exactly the wrong direction here.  You actually have a 
regular mesh of points, but the data file *hides* that structure as good 
as it possibly can.  If you wanted contours, you shouldn't do that.

On top of that, the z values in that file are all either 2, 5, 6 or your
"trademark" (1/0)-in-a-datafile.  That won't give you meaningful contour
lines.

> Can you tell me a way to achieve this?  Or suggest any other way to draw 
> the contours.

If nothing else helps, consider 'set dgrid3d'.

  Hi,

  I want to draw a contour plot in gnuplot but 
  I want all the positive contours to be colored red 
  and all negative contours colored blue. I tried Pm3d 
  but I don't like the color variations. I just want all 
  negative values (irrespective of magnitude) blue and 
  all positive values red.

  Thank you 

  John Appleton

thank you!

Jeffrey Pace
Sr. Systems Analyst
Geographic Information Services Department
1112 Manatee Avenue West
Bradenton, FL 34205

jef...@co...
(941)749-3075 x3557

Hans-Bernhard Br=F6ker <br...@ph...>=20
08/10/2006 03:56 PM

To
Jef...@co...
cc
gnu...@li...
Subject
Re: [Gnuplot-info] install to non-default location issue

Jef...@co... wrote:

> I am having a issue installing.  I install to a non-defualt directory=20
(no=20
> root priveldges)=20

... and how exactly did you do that?  You have to specify the actual
install location as a prefix at ./configure time --- if you don't,=20
you'll get exactly the kind of problem you describe, every time.

Jef...@co... wrote:

> I am having a issue installing.  I install to a non-defualt directory (no 
> root priveldges) 

... and how exactly did you do that?  You have to specify the actual
install location as a prefix at ./configure time --- if you don't, 
you'll get exactly the kind of problem you describe, every time.

I am having a issue installing.  I install to a non-defualt directory (no 
root priveldges) and everything installs fine.  However, when i run 
gnuplot, and run "test" it is looking for X11 driver in the /usr/local - 
not where I installed it.  I tried X11_DRIVER_DIR flags on make but ti did 
nothing.  same error with the help file.  ANy help is appreciated.

Jeff

Jeffrey Pace
Sr. Systems Analyst
Geographic Information Services Department
1112 Manatee Avenue West
Bradenton, FL 34205

jef...@co...
(941)749-3075 x3557

Manish Goel wrote:
> Hans-Bernhard Br=F6ker wrote:

>> Yes.  But that doesn't mean you can put the actual string "(1/0)" =
into=20
>> a data file and expect that to work the same way.  1/0 is just a w=
ay=20
>> to generate the value infinity in a gnuplot command script.  But d=
ata=20
>> files aren't scripts.  You'll have to use 'set missing' --- and=
=20
>> possibly convince Ethan that this is the kind of example that shou=
ld=20
>> define how that's to be interpreted.

> I agree your point that (1/0) is string read from datafile not a va=
lue=20
> but after using ($3) it is converted into value and behave correctl=
y.=20

But that's by accident more than by design.

> But my problem is to get a mesh from single dataset with a hole in =
it.=20
> What I mean to say is that if you make any value of Z in grided dat=
aset=20
> as undefined and try to use splot command on it to plot the mesh th=
en=20
> you won't get the one. what you get are only Isolines and not any=
=20
> x-Isolines.=20

That's where 'set missing' and convincing Ethan would come into play.

horatiu wrote:
> Can I calculate with gnuplot the area under a graph. 

Depends on the graph. ;-p

If it's a function plot, have a look at the 'bivariat.dem' example 
script that came with the program.

 > In MS Excel I add the
> results of (x value) * (y value ). 

... I hope you don't, because that is *not* going to give you the area 
under the graph.

Hans-Bernhard Br=F6ker wrote:

> Manish Goel wrote:
>
>> But I want to do this thing with single data set for this purpose. I=20
>> have tried using undefined value; point mentioned in gnuplot.pdf on pa=
ge
>> 44 that gnuplot tool supresses those points whose z-cordinate value is
>> undefined (1/0).=20
>
>
> Yes.  But that doesn't mean you can put the actual string "(1/0)" into=20
> a data file and expect that to work the same way.  1/0 is just a way=20
> to generate the value infinity in a gnuplot command script.  But data=20
> files aren't scripts.  You'll have to use 'set missing' --- and=20
> possibly convince Ethan that this is the kind of example that should=20
> define how that's to be interpreted.
>
>
>
>
>
I agree your point that (1/0) is string read from datafile not a value=20
but after using ($3) it is converted into value and behave correctly.=20
But my problem is to get a mesh from single dataset with a hole in it.=20
What I mean to say is that if you make any value of Z in grided dataset=20
as undefined and try to use splot command on it to plot the mesh then=20
you won't get the one. what you get are only Isolines and not any=20
x-Isolines. That's the problem that gnuplot don't plot x-isolines if for=20
any (x,y) coordinate value of Z is undefined (which is required for=20
plotting hole).

--
Manish Goel
(mg...@no...)

Can I calculate with gnuplot the area under a graph. In MS Excel I add the
results of (x value) * (y value ). Can I do something like that with gnuplot
or there are other tools for calculating the area under a graph? 
Thanx
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Manish Goel wrote:

> But I want to do this thing with single data set for this purpose. 
> I have tried using undefined value; point mentioned in gnuplot.pdf on page
> 44 that gnuplot tool supresses those points whose z-cordinate value is
> undefined (1/0). 

Yes.  But that doesn't mean you can put the actual string "(1/0)" into a 
data file and expect that to work the same way.  1/0 is just a way to 
generate the value infinity in a gnuplot command script.  But data files 
aren't scripts.  You'll have to use 'set missing' --- and possibly 
convince Ethan that this is the kind of example that should define how 
that's to be interpreted.

http://www.nabble.com/user-files/213/holeinmesh.tiff holeinmesh.tiff 
http://www.nabble.com/user-files/214/hole.dem hole.dem 
http://www.nabble.com/user-files/215/output1.dat output1.dat 
http://www.nabble.com/user-files/216/output2.dat output2.dat 
I want to plot mesh with hole in it. Currently I am doing using these two
data files "output1.dat" and "output2.dat" . Just by loading hole.dem you ca
get mesh with hole.

But I want to do this thing with single data set for this purpose. 
I have tried using undefined value; point mentioned in gnuplot.pdf on page
44 that gnuplot tool supresses those points whose z-cordinate value is
undefined (1/0). 
But it didn't turned out so and I have to do it by slicing the mesh. 

Please help me out and tell me a way How I can skip points(in single
datablock) in grided data without slicing.

--
Manish Goel
(mg...@no...
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horatiu wrote:
> I  succeeded my firs =E2=80=9Cserious=E2=80=9D graph with gnuplot, =
but I'm far from what I
> really want. I still don't understand how to use =E2=80=9Cset data =
separator=E2=80=9D
> command. Like I said my data comes like this:
>=20
> , 191,-.92, .133333333333333,-6900

The fact that there's a non-existing firs column may disrupt things=
=20
here.   gnuplot wouldn't consider a leading blank an indicator that=
=20
there's an empty first column.  I think it was meant to do so for=
=20
non-blank separators, but in case of doubt, that's one of the things =
I'd=20
be wary of.

> the graph isn't good =E2=80=93 the shape is far from reality

Please do be more specific.  What *is* the shape, and what is "realit=
y",=20
and what's different between those?

fusselpelusa wrote:
> Hi,
> I have a problem with labelling my plots at an arbitrary position (set label
> "... %f" '???filename and column/line???' at ....) using values from a file.

That's not surprising --- you can't do that.  Gnuplot reads data from 
outside files only in the {re|s|}plot commands.  If you want to extract 
a single piece of data from a file, you have to do that outside gnuplot, 
and feed the result back into it as a command.  The version-4.0 trick of
'set label "foo = %f", foo' works only for gnuplot-internal, numeric 
variables, not for arbitrary data from external files.

If you want to extract lots of data from a file, wait for the 4.2 
release and then use 'plot "file" with labels'

> Anyway, as the value I would like to be as label is not the only
> one in the line of my data file, perhaps awk will not work? 

It will.  You're badly underestimating awk.  someone once wrote an 
entire multi-targeting macro assembler in awk.

> Additionally I would like to implement underneith the plot a few lines of
> text from another textfile like a caption, is this possible with gnuplot? 

Possible, sure (generate a multi-line 'set ylabel' or several 'set 
label' commands from it), but rarely advisable.  If you want a caption, 
do it outside gnuplot, in the document processing system you're putting 
that plot in.

> Hi,
> I have a problem with labelling my plots at an arbitrary position (set label
> "... %f" '???filename and column/line???' at ....) using values from a file.

I don't think that this is possible.
You might be able to somehow do it with variables that you set to contain your text. But I 
don't know how you would set those variables. I don't think you can set variables using a 
datafile (like the plot command). Would be nice though. You could have an external 
program write a file 'setvariables.gp' containing:

set <variable> = <text>

and execute 'setvariables.gp' in your script, like:

load setvariables.gp

Then you could use <variable> in your label command instead of the text.
That might work.

> Searching in the gnuplot manual did not help unfortunately. A google-search
> did not do the job either. Perhaps I have to use the awk(?) or sed (?)
> command? Anyway, as the value I would like to be as label is not the only
> one in the line of my data file, perhaps awk will not work? 
> Right now, my data file consists of two columns, from where I am plotting
> all except the last line (with the every command). The interesting number in
> the last line is the one in the second column which should be the label of
> the graph. 
> I am pretty new to the unix/gnuplot area. 
> That's why the online helping tools/manuals for awk/sed ... are a bit too
> short for me to understand without lots of examples.  
> 
> Additionally I would like to implement underneith the plot a few lines of
> text from another textfile like a caption, is this possible with gnuplot? 
> Thanks a lot for your help and sorry if I am posting an already answered
> question, I could not find any related answer while searching in the forums
> archive.
> Cheers
> Fusselpelusa

-- 
Tammo Heeren, Ph.D
mailto: Tam...@ie...

> I  succeeded my firs "serious" graph with gnuplot, but I'm far from what=
 I
> really want. I still don't understand how to use "set data separator"
> command. Like I said my data comes like this:
> 
> , 191,-.92, .133333333333333,-6900
> , 191.5,-.919066666666667, .133333333333333,-6893
> , 192,-.918, .133333333333333,-6885
> , 192.5,-.917066666666667, .133333333333333,-6878
> , 193,-.916133333333333, 6.66666666666667E-02,-13742
> , 193.5,-.915066666666667, .133333333333333,-6863
> , 194,-.914066666666667, .2,-4570.33333333333
> 
> I tried:
> 
> set datafile separator ","
> plot "CV2.dat" using 2:3
> 
> the graph isn't good - the shape is far from reality

You will need to be more specific in what is wrong with it? Does gnuplot p=
lot the data 
correctly? Maybe you should post the core of your plotfile.

> I succeeded by replacing "," with 2 blanks, but I prefer to don't modify=
 the
> datafile.
> Thanks

-- 
Tammo Heeren, Ph.D
mailto: Tam...@ie...

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