(Beginner)Simple for-loop! Help!
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Hello. I have what I believe is a very simple problem, that I just can't wrap my head around.
I want to plot a sine-curve and a square plot that changes between 0 and 1 as the sinus curve goes between positive and negative value. Here is my code:
x=[0:0.1:3*pi];
y=sin(x);
T = zeros(1,length(x));
for i=1:length(x)
if(sin(i) > 0)
T(i) = 1;
else
T(i) = -1;
end
end
plot(x, y, x, T, 'r');
采纳的回答
Geoff Hayes
2017-2-16
Magnarok - rather than conditioning on
sin(i) > 0
use
y(i) > 0
since those are the values of the sine curve. Remember, i is an integer from 1 to the length of your x array, so sin(i) is not what you want to be computing. (I suppose you could do sin(x(i)) > 0 but that seems like extra work when you already have y.)
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