Generate sine wave with varying phase

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A VP
A VP 2018-9-26
评论： A VP 2018-9-26
Hello, I would like to have 2 sinewaves, the second sine wave should be in phase with the first for half of its total time and must be out of phase by 30° for the rest of the time. Is there a method to generate this?
Thanks in advance.

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Star Strider
Star Strider 2018-9-26
One approach:
t = linspace(0, 2, 500);
f = 10;
s(1,:) = sin(2*pi*f*t/t(end));
s(2,:) = [sin(2*pi*f*t(1:numel(t)/2)/t(end)) sin(2*pi*f*t((numel(t)/2+1):end)/t(end) + 30*pi/180)];
figure
plot(t, s)
grid
Experiment to get the result you want.
And I hope this is not homework.
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Star Strider
Star Strider 2018-9-26
As always, my pleasure!
Good luck with your research!

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