subtract and save in a file and then plot

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aditi
aditi 2014-4-13
回答： dpb 2014-4-13
I have a file with 5 columns and 100 rows i.e like:
1 2 3 4 5
6 7 8 9 0
2 5 4 9 2
7 4 9 3 5 .....
and so on. I have to subtract 10 from 5th column then add the resultant to 4rth column and then make a new file with 1st, 2nd, 3rd & 4rth column of above file as it is plus a new column containing result of above i.e the one with the values we got after adding resultant to 4rth column.
plz help me with the program

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回答（1 个）

dpb
dpb 2014-4-13
b=[a(:,1:4) a(:,5)-10+a(:,4)];
Read the "Getting Started" section in the Matlab documentation and work thru the examples on array handling w/ colon and so on to get a feel for the syntax.

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