How to make histogram with 4 variables?

How to make histogram with 4 variables? For example,

X = 1:19

Y = 1:7

Z = randi(19,7)

colorbar = rand([400, 800], 19, 7) ;

Can anyone please suggest?

Answer 1

[Bhuvanyu Dogra]

It is my understanding that you want to create a multi-variable histogram.

The following MATLAB Answer resolves a similar query:

https://www.mathworks.com/matlabcentral/answers/428358-how-to-plot-simple-histogram-of-multiple-variables