How to put a range of values into an array

So I have a range of values that need to go into an array so I can then add a second range to each element of the array. It's not a range of values I can just manually type out; it's a range of sizes, and then on each value for each size, I need to add on a range of colors. I just have no idea how to do this; I'm completely new to Matlab and have no idea what I'm doing.

Answer 1

[Krystyna Doran]

I'm answering my own question because this was the solution that worked:

I performed a matrix multiplication between the two ranges of values by transposing the second matrix, then plotted the resuling equation using imagesc.

Answer 2

[KSSV]

Read aboout linspace.

xo = 1 ; x1 = 10 ; 
x1 = linspace(x0,x1,500) ;  % creates 500 points between 1 and 10 
dx = 0.1 ;
x2 = x0:dx:x1 ;  % creates elements with a difference of dx 

[Krystyna Doran]

Thanks, I'll take a look!

[Krystyna Doran]

So say that in this case, dx is also a range? (In this case, wavelengths). Can I define dx as a range, and then apply every value of dx to each individual value made in x1?