counting frequency of strings

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)

Answer 1

[Azzi Abdelmalek]

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')]

[huehuehue]

exactly what I wanted, thanks!

[Cedric]

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