Plotting two vectors side by side.

I have two arrays that should plot to give the same (very similar) graphs. My first array, A, is 1 X 601 while my second array, B, is 1 X 1200. I want to re-scale one of these so I can plot them together and look at where they deviate from each other. What is the best way to re-scale them so that the minimums from array A are aligned to the minimums of array B? Or at least the two major minimums are aligned.

Any help would be greatly appreciated, I have been looking for a solution online however this one beats me.

Thanks in advance!

[Sammit Jain]

Can you share some information about the variable you're plotting it against and what is the size for that one?

[Robbie McDermott]

Hi Sammit,

I haven't plotted at against anything yet. I just loaded up the data file and used the plot function to look at it.

Answer 1

[Star Strider]

Use the linspace function:

A = rand(1,  601);                      % Create Data
B = rand(1, 1200);                      % Create Data

Ax = linspace(0, 601,  601);            % X-Coordinate Vector For ‘A’
Bx = linspace(0, 601, 1200);            % X-Coordinate Vector For ‘B’

figure(1)
subplot(2,1,1)
plot(Ax, A)
grid
subplot(2,1,2)
plot(Bx, B)
grid

Experiment to get the result you want.

[Robbie McDermott]

Aww StarStrider!! Thats, great, I had seen this method posted else where but I couldn't see how it would help! Your explanation is much better! Thank you, that is a great help, my hat off to you!

p.s. cracking name too... star wars or LOTR reference?

[Star Strider]

As always, my pleasure!

I’m an Instrument Rated Private Pilot, and ‘StarStrider’ evolved from that. I’d not thought of the Star Wars or LOTR references before.

If my Answer solves your problem, please Accept it!

Answer 2

[M]

I am not sure if it is really hat you want but here is an idea :

a=rand(10,1);
b=rand(15,1);

a and b are two vectors of different length and amplitude.

Using

plot(a);
hold on;
plot(b./max(b).*max(a))

you can plot a and b on the same graph and the maximum of a and b are of the same amplitude.