Creating a frequency table

Hello,

suppose I have a vector in legnth of 100 that contains a number between 1-4 how can I make a frequncy vector using the data in the vector? I'd tryed the function tabulate but if there is no 4 or 3 for example it will not be in the table and I want it to be there just with the value 0.

Thank's!

[Azzi Abdelmalek]

This is not clear

[googo]

Ok, sorry.

For example : [4 3 2 2 4 3  3] {only numbers between 0-4}

I'm looking for a function that will return a frequency vector :

    0
    0
    2
    3
    4

[Image Analyst]

That's simply the histogram - I think - and you can use histc() or hist(). It's "I think" because I'm not sure why you say there are four 4's when I only see 2. The histogram would say there is two 4's in [4 3 2 2 4 3 3]. Perhaps you can explain your thought process around how you came up with four 4's.

Answer 1

[Azzi Abdelmalek]

a=arrayfun(@(z) sum(ismember(x,z)),0:4)'
out=[(0:4)' a 100*a/numel(x)]

Answer 2

[Andrei Bobrov]

x=[1 1 2 2 1 2 ];

a = histc(x(:),0:4);
out = [(0:4)', a, a/sum(a)*1e2];

Answer 3

[Azzi Abdelmalek]

x=[1 1 2 2 1 2 ]
y=[x 5]
out=tabulate(y)
out(end,:)=[]

[googo]

>> x=[1 1 2 2 1 2 ];
y=[x 5];
out=tabulate(y);
out(end,:)=[];
>> out

out =

      1.0000    3.0000   42.8571
      2.0000    3.0000   42.8571
      3.0000         0         0
      4.0000         0         0

it was suppose to be 
         0      0   0%
         1      3  50%
         2      3  50%
         3      0   0%
         4      0   0%

didn't understand the purpose of the "5" in your code. Thank's!

[Azzi Abdelmalek]

You said between 1 and 4

[googo]

ho... sorry.. my mistake but anyway why it's 42.85% an not 50%?

[Azzi Abdelmalek]

If there is no 4 in your list, tabulate will not show 4 0 0 like you said, To resolve the problem,I've added 5 and removed its result

[Iman Ansari]

x=[1 1 2 2 1 2 ];
[0:4 ;histc(x,0:4)]'

[Azzi Abdelmalek]

Iman , make it as an answer