Calculation of probality numbers from "matrix/array"

Hello, I just start coding in Matlab and I would like to calculate probability number. f.e

A=[1 7 1 2 8 8 6 3 7 7]

then, I would like to know probability of number 8 or 6 etc. "A" could be array for example.

Is any function for this or is possible to use any simple loop to find this.

Thank you.

Answer 1

[Raunak Gupta]

Hi,

You can count number of element equal to a particular number in a vector/matrix using nnz and equality condition. For above query you can find first for 8 and then for 6 and add the two and divide by total number of elements in a vector/matrix.

numOf8 = nnz(A==8); 
numOf6 = nnz(A==6); 
probOf8or6 = (numOf8 + numOf6)./numel(A); 

[Oliver Bubniak]

Thank you ;)