How do I add a column to a matrix with specific values?

3 views (last 30 days)
If I have a matrix like so:
1 2 3 4
5 2 6 7
3 6 5 7
How can I add a third column with a value of one for every row that has a value of 2 in the second column? Thanks!

Accepted Answer

Z
Z on 8 Jul 2013
Never mind, I found out that this is the syntax:
mydata (mydata (:,2) == 2,4) = 1;

More Answers (1)

Greg Heath
Greg Heath on 10 Jul 2013
The question is ill posed.
The matrix has 4 columns and the question is how to add a third column.
The accepted answer is incorrect.
It replaces components in the fourth column
1. Bad question
2. Bad answer.
It should be flagged.

Tags

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!