How to plot a zero-one matrix that will look like scatter?

Question

I have a matrix of zeros and ones and I want to plot the ones in their location in the matrix. So that it will look like the matrix but instead of ones a marker and instead of zeros nothing. Is there a function for doing this or I need to get the x and y for every one and then just do a simple scatter plot? Thank you for the help!

Answer 1

Try the function spy, it plots a blue dot for every non-zero entry of a matrix.

Answer 2

imagesc

is an approach for this that I find useful.