# Create a matrix that contains sine wave

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Mohammed Magdy Sharara on 22 Oct 2018
Answered: Akira Agata on 22 Oct 2018

Define a 5xN matrix such that each row of the matrix contains a sine wave with a frequency equal to the row number. (0 < t < 1).

I am doing the matrix of zeros thingie but it keeps telling me an error

t=0:0.001:1; x=zeros(5,length(t)); for i=1:length(t) x(i)=sin(2.*pi.*i.*t) end

can any body help ?

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### Answers (2)

Erivelton Gualter on 22 Oct 2018
Try this:
t=0:0.001:1;
x=zeros(5,length(t));
for fi=1:5
for i=1:length(t)
x(fi,i)=sin(2*pi*fi*t(i));
end
end
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madhan ravi on 22 Oct 2018
+1 vote crystal clear @Erivelton

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Akira Agata on 22 Oct 2018
You can avoid for-loop by simply:
t = 0:0.001:1;
f = 1:5;
x = sin(2*pi*f'*t);
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