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

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How can I calculate log10(variable) ??? there is error..
  2 Comments
Steven Lord
Steven Lord on 17 Oct 2021
What is the full and exact text of that error message (everything displayed in red in the Command Window)?
the cyclist
the cyclist on 17 Oct 2021
Or upload variable in a mat file here, using the paperclip in the INSERT section of the toolbar.

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Accepted Answer

Dave B
Dave B on 17 Oct 2021
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)

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