Count the frequency of a number in a series of numbers.

Hi,

I have created a random function to create randomly the numbers 1, 2 or 3. On another m-file I have ran this 100 times to see if it is uniformally distributed. I have done this by using a for loop. The function m-file is

function r = randit3;
r=randi(3,1);
and to test it works is
for a=1:100;
y=randit3;
end

However I want to count how many 1's, 2's and 3's come up. Please help.

I have tried plotting it on a graph and the best I can do is this.

for a=1:100;
y=randit3;
plot(a,y,'*')
hold on
end

Thank you

Answer 1

[Paulo Silva]

doc histc

example

a=[1 2 3 4 5 6 1 2 6 6 6];
[n,bin]=histc(a,1:6);

n is the frequency and bin is the number

example: 6 (bin(end)) appears 4 (n(end)) times

See Oleg Komarov answer:

c = histc(A(:),unique(A))

[Raminder1992]

How do i input that into my code.

I have tried looking up the histc, however I am still a bit unsure.

Sorry, I am quite new to Matlab.

Thank you for your help.

[Oleg Komarov]

Look at the asnwere given here to the same question: http://www.mathworks.com/matlabcentral/answers/7022-frequency-determination