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Topic: import data in matlab
Replies: 3   Last Post: Apr 15, 2009 8:12 PM

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Andrea Asoni

Posts: 10
Registered: 4/15/09
import data in matlab
Posted: Apr 15, 2009 6:26 PM
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hi,

just started using matlab. I have the following problem. I think it is sort of standard but i couldn't figure out how to deal with it.

I have data in .txt format that look like

var1 var2 var3
1 . 3
2 6 4
2 3 5

I have about 141 vars and 90k obs. I'd like to drop the rows with missing values. I found i can use the command X(any(isnan(X),2),:) = [];.
In order to do that i have to import the data separating the name of the variable from the matrix (through the import wizard). Since different variables have more or less missing values i cannot do this importing them as separate vectors...

then i need to perform some calculations like newvar=f(var1, var2, var3)... How do I say to Matlab that var1 is actually the first column of the matrix, var2 the second and so on?

thanks,
Andrea



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