Histogram with data frequency

I need to make a histogram that each of the data have their own frequency

say:

X=[ 4  3  1  12  15  3  8  15  13  20  4  12  15  16  16  2  2  15  18  4 ] 

is the data and

Y=[ 2  1  1   1    2   2  1   1    1    1   1   2    2    2    1   2  1   2    1   2 ] 

is the frequency of each of the data

and I need to bin these data into 20 bins, such as

binEdges = linspace(0, 1, 20+1)

a normal histogram of X would show the frequency of "4" as 3 because there are 3 of them in the X. What I want to achieve is to have a histogram that would show a frequency of 5 for "4" because there are two "4" with Y frequency of 2 and one "4" with Y frequency of 1. Same goes with the rest. How to code this logic?

Thanks,

Fadhil

Answer 1

[Jamal Nasir]

%%%%%%% you can use this code %%%%%%%%%%%

a=unique(x);

b=length(a);

for i=1:b

c(i)=sum(y(x==a(i)));

end

bar(c)

%%%%%%%%% jamal %%%%%%%%%%%

Answer 2

[dpb]

nc=accumarray(X.',Y.');
bar(1:numel(nc),nc)