how to have a vector that counts how many repetitive numbers there is in another vector?

So i have a vector with 100 numbers. And those numbers only goes until 51.

For example A = [ 50 49 32 21 50 38 41 2 46.....]

And what i want is a vector B that has 51 numbers and tells me for example how many 1's there is in vector A, and how many 2's there's in the vector and so on.

Thank you

[madhan ravi]

Could you upload your attempted code?

Answer 1

[madhan ravi]

Maybe try this example:

A = [1 2 3 3 4 5 1]

u = unique(A)

Expected_result = histc(A,u)

Answer 2

[Image Analyst]

Do you mean the histogram?

% Make a vector with 1000 numbers in the range 1 - 51.
A = randi(51, 1, 1000)
% count frequency of each number
histObj = histogram(A)
grid on;
title('Histogram of A', 'FontSize', 17);
xlabel('A Value', 'FontSize', 17);
ylabel('Count', 'FontSize', 17);
% Get counts.
counts = histObj.Values
% Get bin edges.
edges = histObj.BinEdges
% Get bin centers.
binCenters = (edges(1:end-1) + edges(2:end)) / 2

Answer 3

[Andrei Bobrov]

out = [(1:51)',histcounts(A,1:52)']