How to plot desired datapoints on a curve?

Hello, I have a vector t -> 40000x1 and y -> 40000x1. I wish to plot this data with respect to desired data yhat -> 58x1. How can I do it? Thank you

Answer 1

[William Rose]

@ekagra gupta,

You must have a vector that (58 x 1), which accompanies yhat (58 x 1). Let us create vectors to use as examples:

t=double(1:40000);
y=sin(t/2000)+0.1*randn(size(t));
that=[1:689:40000]';       %time vector, 58 x 1
yhat=sin(that/2000);       %desired data, 58 x 1

Then you may do

yhat=plot(t,y,'b.',that,yhat,'-rx');  
legend('y','yhat');

Good luck.