Creating a frequency table
9 views (last 30 days)
Show older comments
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!
3 Comments
Image Analyst
on 31 May 2013
Edited: Image Analyst
on 31 May 2013
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.
Accepted Answer
Azzi Abdelmalek
on 31 May 2013
a=arrayfun(@(z) sum(ismember(x,z)),0:4)'
out=[(0:4)' a 100*a/numel(x)]
0 Comments
More Answers (2)
Andrei Bobrov
on 31 May 2013
x=[1 1 2 2 1 2 ];
a = histc(x(:),0:4);
out = [(0:4)', a, a/sum(a)*1e2];
0 Comments
See Also
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!