how can i plot a half sine wave plot or a cosine wave which has a origin as a centre ?

can we plot a sine wave which half wave i.e. positive side only

can we plot same sine wave in reverse direction from above plot

what can i use if exist either matlab .m file or simulink

or

how can i plot a cosine wave which has a centre on origin

Answer 1

[Adam Danz]

"can we plot a sine wave which half wave i.e. positive side only"

Yes. Here's a hint. This produces one full cycle of a sin curve between -pi and pi. You'll want to plot it from 0 to pi.

x = -pi : 0.01 : pi;
y = sin(x);
plot(x,y)
grid on

"can we plot same sine wave in reverse direction from above plot "

I'm not sure what this means. Perhaps you want the section between -pi and 0?

" how can i plot a cosine wave which has a centre on origin "

Hint: use cos() instead of sin().

[sesha sai]

thank you sir for your valuable answer

but i need the plot to be like figure

[Adam Danz]

Hint: plot(x,-y) let me know if you need more help and tell me what you've tried.

[madhan ravi]

Adam the OP has asked the same question again and he seems to have solved his problem.

[sesha sai]

https://in.mathworks.com/matlabcentral/answers/457172-how-can-i-plot-a-half-sine-wave-plot-or-a-cosine-wave-which-has-a-origin-as-a-centre#comment_696130

it was working thank you sir

but how to change amplitude and how it can be converted as a source block for simulink