k-Wave

1. acegi70
   

   Member
   Joined: Apr '12
   Posts: 3

   Hi,

   I just found out about k-wave and am just trying to learn it by looking at some of the examples on my mac OsX Lion.
   One thing I looked into was the "Simulating ultrasound beam patterns" example. If I run this, it works fine. However, I wanted to look at the fundamental and harmonic beam profiles and so I set USE_STATISTICS = fase; and ran the example again. Doing this gave me an error message as shown below:

   Warning: SPECTRUM is obsolete and will be removed in future versions. Use
   the spectrum objects instead, type "help SPECTRUM".
   > In spectrum at 103
   Warning: Rounding order to nearest integer.
   > In signal/private/check_order at 28
   In hanning at 25
   In spectrum>specchk at 321
   In spectrum at 106
   Error using spectrum>specchk (line 398)
   Requires positive integer values for NFFT and NOVERLAP.

   Error in spectrum (line 106)
   [x,y,nfft,noverlap,window,Fs,p,dflag]=specchk(varargin);

   It seems that the error is generated by the "spectrum" function and I was wondering if anyone could suggest how to go about fixing this issue. Thank you.

   Posted 12 years ago #

2. Bradley Treeby
   

   Developer
   Joined: Mar '10
   Posts: 1,643

   Hi acegi70,

   This error appears to come from a naming conflict between the spectrum function in the k-Wave toolbox, and the spectrum function in the signal processing toolbox. We'll consider changing the name for future releases, but as a work around you could try either:

   (1) Renaming the spectrum function in the toolbox to kspectrum, and then changing the line of the code in the example to call kspectrum instead.

   (2) Copying the spectrum.m file into the examples folder to see if that forces the k-Wave function to take precedence.

   I hope you can get it working!

   Brad.

   Posted 12 years ago #

3. acegi70
   

   Member
   Joined: Apr '12
   Posts: 3

   Hi Brad,

   Great. It works now! Thank you very much for your quick reply.

   Jun

   Posted 12 years ago #

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