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From: Randi Price on 27 May 2010 13:48
Hi, thanks in advance for your input. I'm a super newbie Matlab user, so also thanks for your patience! :)

I have a collection of data files: "z.txt" that are x,y pairs. The x column in each data file is the same. I have written a program that will choose a particular x value.

I need to find the y value for that x in each z.txt file and make a new array that is y vs. z.

Then I want to be able to do this with many x values and save all the y vs. z arrays for each x to the same file.

Ex:
100.txt:
0.10,0.44
0.20,0.32
0.30,0.68
0.40,0.84
0.50, 0.24
0.60, 0.47

200.txt:
0.10,0.87
0.20,0.53
0.30,0.29
0.40,0.32
0.50, 0.63
0.60, 0.11

Convert this to...
"0.20".txt:
100, 0.32
200, 0.53

"0.40".txt:
100,0.84
200,0.32

etc...
Btw, if it matters there are about 1000 x,y pairs in each z.txt file, and there are about 20 z.txt files. I would like to be able to choose ~20 x values. The output files x.txt should be able to be imported into Excel or SigmaPlot.
Thanks so much!
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