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quickkk
Canada
23 Posts |
 Posted - 01/17/2005 : 2:58:49 PM
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Hi everybody,
I was wondering if anyone had a quick answer for me. This is what I want to do:
-import some data from a file (which is allready organized as ascii columns)
-plot it
-change a few things on the plot (apply a theme, change title)
-export plot as gif
-do this 1000 times with different data files.
This is what I currently do:
I run a little origin LabTalk script:
for(jj = start; jj < stop; jj++)
{
open -w z:\home\amorris\work\oscillator\data\rotation\eig$(jj).dat;
%N=%H; #save the name of the worksheet
work -s 0 0 0 0;
work -p 201;
rrr=jj/1000; #rrr is some experimental parameter
label -s -q 2 -j 1 -n mytitle "r = $(rrr)";
image.FileName$ = "z:\home\amorris\work\oscillator\data\i_%N.gif";
Image.Export.PagePixel( gif, 640, 480, 24, 0 );
win -a %N; #make worksheet active so that I can import next graph
};
The problem is that this thing gets quite slow if I import large files. Is there anyway to bypass the actual plotting of the graph or data import? Ideally I would like origin to contruct a graph directly from my data file (since the first column is x, and the rest are y columns) . Then, instead of writting the results to the screen, I would like Origin to save the graph directly as a gif image file (kind of like writting to a file instead of the screen). This would bypass the slow plotting stage; all I want is the gif image so I don't care about Origin's graph.
Is there any way to do this with LabTalk? How about using OriginC? I'm not familiar with it so I don't want to spend a bunch of time learning OriginC if it can't help me!
Thanks! |
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Mike Buess
USA
3037 Posts |
Posted - 01/17/2005 : 5:03:36 PM
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I'm sure you need to plot the data but if your files all have the same number of columns you can save a lot of time by recycling the graph window as you've done with the worksheet window. It's best if you avoid renaming the worksheet on import. Open ASCII Options for your worksheet, select Other Options and uncheck the Rename Worksheet to Data File Name Option. Then save the template and run this script...
%B=Z:\home\amorris\work\oscillator\data\rotation\;
win -t D; %W=%H;
open -w %Beig$(start).dat;
wo -s 0 0 0 0;
wo -p 201;
%P=%H;
for(jj=start; jj<=stop; jj++) {
win -a %W;
%N=eig$(jj);
open -w %B%N.dat;
win -a %P;
plot -c; // might be necessary to update the plot
lay -a; // might also be necessary to rescale
rrr=jj/1000; #rrr is some experimental parameter
label -s -q 2 -j 1 -n mytitle "r = $(rrr)";
image.FileName$ = "z:\home\amorris\work\oscillator\data\i_%N.gif";
Image.Export.PagePixel( gif, 640, 480, 24, 0 );
};
That will be much faster than the method you're using now. Origin C will be even faster... if you feel like trying then I or someone else can start you off.
...The LabTalk script I gave you can probably be optimized further by importing in the background. Try replacing these lines in the for-loop...
win -a %W;
%N=eig$(jj);
open -w %B%N.dat;
win -a %P;
with these two lines...
%N=eig$(jj);
win -o %W {open -w %B%N.dat};
That way the graph window remains active the whole time.
Mike Buess
Origin WebRing Member
Edited by - Mike Buess on 01/17/2005 5:15:05 PM
Edited by - Mike Buess on 01/17/2005 5:59:27 PM |
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quickkk
Canada
23 Posts |
Posted - 01/19/2005 : 10:03:52 AM
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| Thanks for the reply! You're right that it's a lot faster to simply keep one graph. I also tried to do the background import, but for some reason it doesn't work... I'll look into it some more. THanks! |
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Mike Buess
USA
3037 Posts |
Posted - 01/19/2005 : 10:12:59 AM
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The background import should work but I've never actually tried. Might be something in the import routine that prevents it from working.
You'll probably gain a little speed if you can omit the update (plot -c) and/or rescale (lay -a) commands. You might try commenting out those lines and see what happens.
...Just tried win -o %W {open -w %Z} in Origin 7.5. Works fine regardless of which window is active as long as %W and %Z are defined properly.
Mike Buess
Origin WebRing Member
Edited by - Mike Buess on 01/19/2005 11:24:34 AM |
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quickkk
Canada
23 Posts |
Posted - 01/20/2005 : 3:57:53 PM
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you're right, it did work. I just made a mistake in the path! Doh!
Thanks for the help |
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Topic |
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faster import/plot/export ?