Plot 4000x500 2D matrix

I got a 4000x500 matrix with small numbers like 0.0119 etc What I need is to get kmean clustering with that matrix And Im struggling from the beginning, plot this matrix on 2D I tried plotmatrix(X) and it stopped Please help me out!!!

[Rik]

Such a matrix size is probably easier to explore with imshow.

Answer 1

[KSSV]

Read about surf, pcolor, imshow, imagesc.