error in my maths?

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Amy Fawcett
Amy Fawcett 2018-11-26
编辑： madhan ravi 2018-11-26
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

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回答（1 个）

madhan ravi
madhan ravi 2018-11-26
编辑：madhan ravi 2018-11-26
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);

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