How to save a value from an array if a condition is true
14 views (last 30 days)
Show older comments
Tejashree Pawar on 21 Oct 2021
Commented: Geoff Hayes on 25 Oct 2021
I have two cell arrays "X" and "Y". I need to check if a value in X==1, then save the corresponding Y value. How to do that in a for loop (I have many runs of X and Y)
Geoff Hayes on 21 Oct 2021
@Tejashree Pawar - do you need to use a loop? For example, if your X and Y arrays are the same dimensions, then (for example) if
X = [1 2 3 1 4 5 1 6 7];
Y = [7 2 2 8 2 2 9 2 2];
Z = Y(X==1)
then Z is
7 8 9
since X==1 returns a logical array of ones and zeros where a one corresponds to the match (to 1) in X. We can then use this logical array to extract those values from Y which match the logical 1.
Geoff Hayes on 25 Oct 2021
@Tejashree Pawar - couldn't you just use a single for loop to iterate over each element of X and then compare to 1? If true, then extract the equivalent element from Y and insert into an array. Is the problem keeping track of the data from each run?
Find more on Loops and Conditional Statements in Help Center and File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!Start Hunting!