# matrix_plot not returning any outputs in subroutines

```
A=identity_matrix(2)
def f(n):
matrix_plot(n*A)
f(5)
```

I'm puzzled as the command `matrix_plot(5*A)`

works fine on itself, but it produces no output when it goes inside a subroutine as in the above SageMath code.

I'd appreciate any help with understanding why this is so/resolving this.

PS I have tested this both on http://Sagecell.sagemath.org and a local installation.

Also asked as Stack overflow question 67113741.