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Legend of Many curves on one graph?!

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Ano
Ano 2017-6-12
回答： KSSV 2017-6-12
Hello, I would like to have a legend that is on a for-loop so for each entry I would like to have a name of my data , how can I do it ? I have tried the following line but it doesn't work!
for i=1:5
load all my file .*mat
do some calculations
plot(data)
legend (num2str(i))
hold on
end

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KSSV
KSSV 2017-6-12
N = 5 ;
str = cell(N,1) ;
for i=1:N
% load all my file .*mat
% do some calculations
plot(rand(10,1))
str{i} = num2str(i) ;
hold on
end
legend(str)

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