complex sine graph plotting I need help
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my complex sine graph is 1050 points. I want it to be just 100 points for some other math calculations. here is the function. can someone please fix it for me so that stpFunc is 100 instead of 1050 and still graphs similarly, thanks a ton!
n = 1050;
w = [0:.005:1-0.005]';
w=repmat(w,5,1); %repmat(w,10,1);
w=[zeros(50,1);w];
t=[zeros(50,1)];
for i=1:5 %10
t=[t;i*ones(200,1)];
end
stpFunc = sin(2*pi*w.*t);
complex_sine = stpFunc'
figure; plot(stpFunc,'linewidth',3);
2 个评论
Azzi Abdelmalek
2016-7-22
编辑：Azzi Abdelmalek
2016-7-22
Can you explain what your code is doing?
Osita Onyejekwe
2016-7-22
回答（2 个）
Star Strider
2016-7-22
I do not understand everything you are doing. If you want ‘w’ to have a length of 100, use the linspace function:
w = linspace(0, 1, 100);
I cannot follow what you are doing with the rest of your code, so you will have to change it to work with the new ‘w’.
4 个评论
Osita Onyejekwe
2016-7-22
Star Strider
2016-7-22
This interpolates the original to be a length of 100, but even using the 'spline' interpolation method, the undersampling does not reproduce the original look of the function.
n = 1050;
w = [0:.005:1-0.005]';
w=repmat(w,5,1); %repmat(w,10,1);
w=[zeros(50,1);w];
t=[zeros(50,1)];
for i=1:5 %10
t=[t;i*ones(200,1)];
end
stpFunc0 = sin(2*pi*w.*t); % Original ‘stpFunc’
stpFunci = linspace(1, length(stpFunc0), 100); % Interpolation Vector
stpFunc = interp1([1:length(stpFunc0)],stpFunc0,stpFunci,'spline'); % Interpolated ‘stpFunc’
complex_sine = stpFunc';
figure; plot(stpFunc,'linewidth',3);
Osita Onyejekwe
2016-7-22
Star Strider
2016-7-22
My pleasure!
If my Answer solved your problem, please Accept it.
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2016-7-22
2016-7-22
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