Find elements in a matrix

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]

You can read about logical operators here

https://www.mathworks.com/help/matlab/logical-operations.html

Answer 1

[M]

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]

nnz(idx)

is simpler and faster than numel(find...)

Answer 2

[Ruger28]

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