Getting the percentage of values greater then 0.3 using linear and subscript indexing.

Hi all, I'm currently trying to find the percentage of values greater than 0.3 through just linear and subsccript indexing. I'm currently using logic indexing but I'm not sure how to do it without logic indexing. Any help would be very much appreciated. My current code is below.

clearvars

clc

close all

A1 = rand(20,30);

B1 = A1 > .3;

C1 = A1(B1);

D1 = sum(C1,1)./(20.*30).*100;

A2 = rand(50,50);

B2 = A2 > .3;

C2 = A2(B2);

D2 = sum(C2,1)./(50.*50).*100;

A3 = rand(100,100);

B3 = A3 > .3;

C3 = A3(B3);

D3 = sum(C3,1)./(100.*100).*100;

A4 = rand(200,200);

B4 = A4 > .3;

C4 = A4(B4);

D4 = sum(C4,1)./(202.*200).*100;

PRCT03 = [D1 D2 D3 D4];

Answer 1

[Image Analyst]

% Using logical indexing
A1 = rand(20,30);
pct = 100 * sum(A1 > 0.3, 'all') / numel(A1)

pct = 68.5000

% Using linear indexing
linearIndexes = find(A1 > 0.3)

linearIndexes = 411×1

4 5 6 7 9 10 11 12 13 16

pct = 100 * length(linearIndexes) / numel(A1)

pct = 68.5000