counting frequency of strings

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huehuehue
huehuehue 2013-3-22
Hi I have a very large variable containing 3 letter country codes (GBR, CHN, USA, etc) and i think some of them repeat, so what is the best way to find the frequency of every country in that variable?
Thanks PS: variable size is 100 x 3 (100 countries)

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回答（1 个）

Azzi Abdelmalek
Azzi Abdelmalek 2013-3-22
编辑：Azzi Abdelmalek 2013-3-22
x=strvcat('USA','ALG','FRA','ALG','FRA');
y=unique(x,'rows');
for k=1:size(y,1)
freq(k)=sum(ismember(x,y(k,:),'rows'));
end
out=[cellstr(y) num2cell(freq')]
If your data is a cell array
x={'USA';'ALG';'FRA';'ALG';'FRA'};
y=unique(x);
for k=1:numel(y)
freq(k)=sum(strcmp(x,y(k)));
end
out=[y num2cell(freq')]
  2 个评论
huehuehue
huehuehue 2013-3-23
exactly what I wanted, thanks!
Cedric
Cedric 2013-3-23
编辑：Cedric 2013-3-23
Don't forget to [ Accept ] the answer.

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