Write matrix or array without overwriting

6 views (last 30 days)
Hi,
I am getting a parameter called 'test' in a for loop. I want to write it to a matrix or array without overwriting. Each loop has a different dimension so that makes it a bit complicated.
I need on line h 'r' values of test, line h the new 'r' values of test and so on. So test needs to come in row h, column r.
for h = 3:10
...
...
...
A = []
for r = 1:g
...
for m = 1:numbcenterlines
...
percentage(m) = sum(distance>0 & distance <1) / numel(distance)*100;
test = max(percentage,[],'all');
end
A(r,h) = [A;test] %this part doesn't work well so my question is how to fix this part and get an array here with all the test values without overwriting
end
end

Accepted Answer

Stephen23
Stephen23 on 18 Feb 2021
You are mixing up two different approaches to adding data in a loop: concatenation and indexing. Just pick one, e.g.:
A = [A;test];
  6 Comments
Dion Theunissen
Dion Theunissen on 18 Feb 2021
A =
0 0 67.9666
0 0 57.2263
0 0 73.3220
0 0 19.6101
0 0 21.3058
0 0 88.3791
0 0 78.7196
A =
0 0 0 36.5854
0 0 0 36.5854
0 0 0 36.5854
0 0 0 36.5854
0 0 0 36.5854
0 0 0 36.5854
0 0 0 36.5854
This is the result, but i want to save the third column aswell.
Walter Roberson
Walter Roberson on 18 Feb 2021
Do not do the
A = [];
inside your outer loop.

Sign in to comment.

More Answers (0)

Categories

Find more on Loops and Conditional Statements in Help Center and File Exchange

Products


Release

R2020b

Community Treasure Hunt

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

Start Hunting!