How to plot a figure like this?

Question

How to plot a figure like this

The data is like f(x_i,t_j), i=1,2,..,M, j=1,2,...,N. The horizontal axis is time t and vertical axis is space x

I know that mesh gives a 3-D plot and surf also gives 3-D surface, I wonder which command can give the above 2-D figure?

Answer 1

To make a 2D heatmap, display your array as an image using imshow, and add a colorbar.