Dynamically allocating a float matrix?

Question

Is there any way how to malloc() a 2D matrix in C? I have successfully tried malloc()ing a 1D field, but in matrix I am getting errors.

Answer 1

float *mat2d = malloc( rows * cols * sizeof( float ));

to access a value from the matrix use this adressing scheme:

float val = mat2d[ x + y * cols ];