- `TF = isnumeric (X)`

Return true if `X` is a numeric object.

Numeric objects include real and complex arrays of numeric classes.

See also: `ischar`, `islogical`, `isreal`, `isa`.

### References

- https://www.mathworks.com/help/matlab/ref/isnumeric.html
- https://octave.sourceforge.io/octave/function/isnumeric.html