How can I calculate log10(variable) ??? there is error..

How can I calculate log10(variable) ??? there is error..

[Steven Lord]

What is the full and exact text of that error message (everything displayed in red in the Command Window)?

[the cyclist]

Or upload variable in a mat file here, using the paperclip in the INSERT section of the toolbar.

Answer 1

[Dave B]

Assuming you've defined your variable and it's numeric, this should work:

variable=100;
log10(variable)

ans = 2

x=[100 200 500 1000];
log10(x)

ans = 1×4

2.0000 2.3010 2.6990 3.0000

It may fail if you haven't defined your variable:

log10(y)

Or if your variable is not numeric:

z="100";
log10(z)