How to plot a deviation (upper/lower limit)

Hello,

I have a plotted a signal (black line). Now i want to draw a 5 percent upper and lower limit (range deviation).. See my picture. How can i do this?

Thank you in advance.

Best Regards

Answer 1

[Torsten]

Include 1.05*signal and 0.95*signal in the same plot.

[Philipp Mueller]

One final question. How can i check if a random signal is between the limits? How can detect it or mark in the plot! Can i do this with a code or are some predefined commands? My signal is for a 19894*2 double. Thank you.

[Torsten]

If S_rand is the random signal 19894x2 matrix, you can sort out the points where this signal is not in the prescribed limits by

S_out = S_rand( S_rand(:,2) < 0.95*S(:,2) | S_rand(:,2) > 1.05*S(:,2) )

where S is the 19894x2 matrix of the original signal.