can I do summation of two columns of a text file ?

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ND
ND 2016 年 3 月 5 日
編集済み: Geoff Hayes 2016 年 3 月 5 日
Please I have a text file contains two columns. I need to sum them and write the result and the first coloumn in a new text file.
Like this : text.txt =
0 0
1 2
2 5
-1 -2
The new text contains the first and third column only
0 0
1 3
2 7
-1 -3
Thanks

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Geoff Hayes
Geoff Hayes 2016 年 3 月 5 日
ND - you can try using uiimport to import the data from your text file into an appropriately named variable. When I tried this, using your sample data from above, I had to merge two of the cells to get -1. Once the data has been imported, you can then calculate the sum of the rows. For example, suppose the data is now in a variable as
data = [0 0
1 2
2 5
-1 -2];
You can determine the sum of each row as
rowSums = sum(data')';
You can then use save or fprintf to write the first column of data and rowSums to file.
  1 件のコメント
ND
ND 2016 年 3 月 5 日
編集済み: Geoff Hayes 2016 年 3 月 5 日
Many thanks
I managed to do it like below,
data = dlmread('dd.txt');
rowsum = sum(data);
bb = [data(:,1) rowsum];
dlmwrite('dc.txt', bb)

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