Strange error message using sort( ) ?
3 views (last 30 days)
Show older comments
Hey
I am trying to locate the 10 fundamental frequencies in my power-spectrum. I know, I can find the peaks, by using the findpeaks() function. Then, I would like to sort these peaks and index them. I thought the following code would do this, but I get an error message I don't understand?
>> Y=abs(fft(channel1)); >> nyquist=ceil(length(Y)/2); >> peaks=findpeaks(Y(1:nyquist)); >> [A,I]=sort(peaks) Indexing cannot yield multiple results.
0 Comments
Accepted Answer
Stephen23
on 14 Aug 2015
Edited: Stephen23
on 14 Aug 2015
You have defined a variable called sort, and this is shadowing (i.e. hiding) the inbuilt sort function. MATLAB uses your sort variable and tries to index into it using the variable peaks, but it gets confused by the multiple outputs that you request.
The solution: do not use inbuilt function names for naming variables or functions. You can clear your workspace to remove the variables, and in future use which to check if a name is already used.
0 Comments
More Answers (0)
See Also
Categories
Find more on Shifting and Sorting Matrices in Help Center and File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!