add a string column to integer matrix

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yaniv friedman
yaniv friedman 2016-6-5
评论： yaniv friedman 2016-6-5
I have a Data matrix of 5 columns and many rows, all integers.
I wish to add a 6th column of strings, using a condition on the value of one of the columns (Lets say the 3rd):
If Data(:,3) == 1 , add 6th column string value 'Upper', and else- add it as 'Lower'.
the type of the finished array may be cell or table, because I will export it as a txt file.
Thanks!

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回答（1 个）

the cyclist
the cyclist 2016-6-5
Here's one way:
data = round(rand(7,5));
[m,n] = size(data);
textCol = cell(m,1);
upperIndex = data(:,3)==1;
textCol(upperIndex) = {'Upper'};
textCol(not(upperIndex)) = {'Lower'};
outputCell = [num2cell(data),textCol]

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