How would I go about adding these scales to my figure?

I have the first image, but need to apply the scale that is visible in the next image. How might I go about this? Could you please just point me in the right direction? Thank You.

Answer 1

[MathReallyWorks]

Hello isaiah,

Use this:

 I=imread('Amplitude2.0.jpg');
imagesc(I);
colormap(gray(256));
colorbar;

Input image:

Output:

Answer 2

[Image Analyst]

Use

axis on

To put on a spatial scale. Use colorbar() to show the intensity scale.