While calculating power spectral density it is showing an error , vector lengths must be same

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dark lion
dark lion 2017-11-25
评论： Star Strider 2017-11-25
I am calculating power spectral density of voltage and time values from an excel sheet of 2 columns and 9689 rows. while plotting the graph it is throwing an error "Error using plot Vectors must be the same length. Error in lpf (line 19) plot(fc,Nc)" Please help me out. I am attaching the code file in the above attachment.

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Star Strider
Star Strider 2017-11-25
I cannot run your code, however I believe I see the problem.
First, delete this line:
Nc(2:end-1) = 2*Nc(2:end-1);
and change the plot calls to:
plot(fc,Nc(1:length(fc))*2)
and:
plot(fc,10*log10(Nc(1:length(fc))*2));
That should work.
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Star Strider
Star Strider 2017-11-25
As always, my pleasure!
No, you don’t. You simply need time with it. None of us entered this workd knowing how to program.

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