counting number of times a values appears in file

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aditi
aditi 2014-9-12
回答： Naama 2014-9-12
i have a file with numbers like...
1
2
3
4
2
1
6
4
and so on...
i want to count how many times each number appears in above file.. how to do that??

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回答（2 个）

Andrei Bobrov
Andrei Bobrov 2014-9-12
a = [1, 2, 3, 4, 2, 1, 6, 4]';
a1 = unique(a);
out = [a1 histc(a,a1)];
Naama
Naama 2014-9-12
You can use hist (assuming that you import your data to the x vector):
[count, bin] = hist(x, min(x):max(x));
where count contains the frequency of the numbers in bin.

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