error in my maths?

x=data;
inter = (x(:,2))/(4.308e-3);
wave=20*log(10,(inter/0.00002));

I'm getting an error in line 23 - the final line above, and I can't figure out why - the input data is values from an oscilloscope and I'm trying to convert it to SPL, it works when I was just converting from voltage to pascals (second line) so I'm assuming it's something to do with the logarithm?

Any help is really appreciated

Answer 1

[madhan ravi]

EDITED

It's log10() the syntax you were using is applicable only in MUPAD but not in matlab

x=data;
inter = (x(:,2))/(4.308e-3);
wave=20*log10(inter/0.00002);