Can't help with MATLAB but I program FORTRAN all day, when I need to change an input file I just use an regular text editor. Why can't you simply do that?

Pete

Are all lines pure data lines? Do they have the same column lenghts? Pretty much it depends on the exact file layout how easy this is going to be. A few helpful commands are load, fgetl fscanf, and so forth
Here's some websites that deal with the problem:

http://www.me.pdx.edu/...loadingPlotData.html

http://spiff.rit.edu/...tures/readwrite.html

I have to run hundreds of cases, so I want to avoid cutting and pasting info from MATLAB to the input file each time I run a case.

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Hey those links are nifty. Thanks.

I'm close to having a workable solution here... Thanks again.

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One last tip: free yourself from the oppression of commercial software and abandon Matlab! See the light, brother: Octave!! LOL

Ha! Mathworks has got many companies by the balls, that's for sure.

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hmm...they don't have a bioinformatics toolbox
bummer

Yes, that's the one downside of it! I've cried myself to sleep countless times during the last 5 months of my thesis work because of Octave's lack of certain functions. You come from Matlab and are so used to a very broad spectrum of functionality. Definitely tough as it takes up a lot of time to program all your own code, but there's the Octave Sourceforge addition that has a lot of functions implemented that the base Octave has not. More importantly, since it's open source you can actually see what the algorithm is doing instead of trusting in the (in)ability of the Mathworks' programmers. Also, Octave seems to have Matlab beat in certain instances, I had a case of numerical instability in a Kalman filter once that occured in Matlab but not in Octave, hmm. Oh, geeky stuff, I love it!

Definitely. For these types of systems, I'd like to have access to the code. I've seen a bunch of stuff behaving oddly (at best)

I had no idea you had a "real" job.

I just thought you were a body model.

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Striving to have sex more than 66 times per year

Get rid of MATLAB and get IDL!

I take it you haven't seen my porn films.

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while doing those porn films, do you grow a porn mustache like klehner?

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Striving to have sex more than 66 times per year

Klehner's agent has approached my agent in the past, but I told him I don't play that game. Not that there's anything wrong with that.

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puts C++ in its place...hmmm...really have to be a physicist to say such a silly thing ;-)

NO, NO, NO! Yearly maintenance is ~$500. See if you can get a student version ($89). It is only one version back.