# Find elements in a matrix

2 views (last 30 days)
Hanna Sundling on 14 Nov 2019
Commented: Guillaume on 14 Nov 2019
The task is to find how many of the elements in A is numbers between 30 and 65, how do I find that? My code looks like this:
Daniel M on 14 Nov 2019

M on 14 Nov 2019
Edited: M on 14 Nov 2019
You can get the indices with:
idx = A >= 30 & A <= 65
To know the number of values corresponding to the condition:
numel(find(idx))
Guillaume on 14 Nov 2019
nnz(idx)
is simpler and faster than numel(find...)

Ruger28 on 14 Nov 2019
This really isnt code, or even an attempt....but
A = randi([10,100],8,20);
B = A(A>=30 & A <= 65); % logically index A using your limits
using FIND
A = randi([10,100],8,20);
C = find(A>=30 & A<=65); % get index of values in your window
D = A(C); % get values in A

### Categories

Find more on Matrices and Arrays 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!

Translated by