Count the occurrence of each element in an array

Hi, Im new to MATLAB. I would like to see if there is a way to count the occrurrence of each the element in an array. For example:

string = 'I am happy';

ch = char(string)

ans = 10×1 char array

'I'

' '

'a'

'm'

' '

'h'

'a'

'p'

'p'

'y'

I want to count the number of ocurrence of each element. For example:

['I' , 1] or ['a' , 2] or ['p' , 2] or [' ', 2]

and maybe store the reuslt in another array. Hope it makes sense. Any help or guide will be appreciate!

Answer 1

[Matt J]

string = 'I am happy';

[N,e]=histcounts(double(string),32:130);

table(char(e(N>0)'),N(N>0)','VariableNames',{'Character','Count'})

ans = 7×2 table
    Character    Count
    _________    _____

                   2  
        I          1  
        a          2  
        h          1  
        m          1  
        p          2  
        y          1