How can plot integral for sin wave

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face wasd
face wasd on 14 Jun 2013
Commented: sirisha tammineni on 23 Feb 2021
HELLO
iam plot sin wave signal and used the code in m file:
t=0:0.1:360*22/7/180;
x1=sin(t);
plot(t,x1);
but how can plot integral for sin wave?
please help me
tech
  4 Comments
Wayne King
Wayne King on 14 Jun 2013
Now, I'm confused. You say "how can plot integral for sin wave?" This has to be the indefinite integral. The definite integral is just a number, so do you want to plot something or do you just want a number. Did you see my response below? That finds and plots the indefinite integral.
face wasd
face wasd on 14 Jun 2013
Iam plot integral for sin wave in simulink ,the form the signal positive and the amplitude from 0 to 2 ????

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Answers (3)

dileep- adabala
dileep- adabala on 14 Jun 2013
DO MATHEMATICAL CALCULATIONS FIRST TTHEN PLOT FOR COS WAVE

Wayne King
Wayne King on 14 Jun 2013
Edited: Wayne King on 14 Jun 2013
t=0:0.1:360*22/7/180;
x1=sin(t);
dt = t(2)-t(1);
x2 = cumsum(x1.*dt);
x2 = x2-1-x2(1);
plot(t,x2)
Or
x2 = cumtrapz(t,x1);
x2 = x2-1-x2(1);
plot(t,x2)
  2 Comments
face wasd
face wasd on 14 Jun 2013
thanks for reply
Iam plot integral for sin wave in simulink ,the form the signal positive and the amplitude from 0 to 2 ????
sirisha tammineni
sirisha tammineni on 23 Feb 2021
x2 = cumsum(x1.*dt);
x2 = x2-1-x2(1); sir can u explain these two lines

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Samarth
Samarth on 14 Jun 2013
f=inline('sinx','x');
syms x;
y=int(f(x),x);
t=0:0.1:360*22/7/180
hold on
plot(y(t),t);
end

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