obtain values of amplitude after executing plot command

how to obtain values of the obtained plot's amplitude in an array after running the plot command ?

I want to store the values of the amplitude's at different time intervals in aray [y], but this command does not yields it.

t = 0:0.001:100;
x1 = 1.1785*((t/pi));
[y] = plot(x1,t);

Answer 1

[Image Analyst]

What is your definition of amplitude? The value of x1 is the amplitude of your signal at every value of t.

y is the handle to the curve on your graph that plot() created. y is not the amplitude of anything.

[Siddharth Singh]

I desire to obtain the values of x1 in an array how can I achieve it

[Image Analyst]

You already did obtain the whole array when you did this:

x1 = 1.1785*((t/pi));

If you want to obtain a subset of values from x1 into another array, you have to specify the starting and stopping indexes. Like if you wanted to store the 4th through 9th elements in x2, then do

x2 = x1(4:9); % Extract elements 4-9 into a new vector x2.