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Jason Farquhar

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Machine Learning, Brain Computer Interfaces

 

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09 Mar 2012 TPROD -- arbitary tensor products between n-d arrays TPROD -- efficiently allows any type of tensor product between 2 multi-dimensional arrays Author: Jason Farquhar matrices, einstein summation, multidimensional mult..., tensor product 20 12
  • 5.0
5.0 | 6 ratings
13 Oct 2010 REPOP -- efficient replicating n-d array operations REPOP -- any element-wise operator between different sized n-d matrices without memory copies Author: Jason Farquhar matrices, replicating array ope... 2 2
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02 May 2012 TPROD -- arbitary tensor products between n-d arrays TPROD -- efficiently allows any type of tensor product between 2 multi-dimensional arrays Author: Jason Farquhar Hespanha, Joao

Sounds great, but I get accuracy error in tprod_testcases:

****************
Double Real X, Single Real Y
******************
dRsR OuterProduct, [1],[2] = 5.96e-08 Passed
dRsR Inner product, [-1],[-1] = 3.76e-08 Passed
dRsR Matrix product, [1 -1],[-1 2] = 3.22e-06 Passed
dRsR transposed matrix product, [-1 1],[-1 2] = 3.56e-06 Passed
dRsR Matrix frobenius norm, [-1 -2],[-1 -2] = 6.94e-07 Passed
dRsR transposed matrix frobenius norm, [-1 -2],[-2 -1] = 7.48e-07 Passed
dRsR ignored dims, [0 -2],[-2 2 1] = 4.49e-06 Passed
dRsR spatio-temporal filter [-1 -2 1],[-1 -2] = 7.2e-05 **FAILED***

The above was from MATLAB 7.14.0.739 (R2012a), OSX Xcode 4.3. I've also tried it with MATLAB 7.13.0.564 (R2011b), OSX Xcode 4.3 and I also get an accuracy error, but at a different spot:

****************
Double Real X, Single Real Y
******************
dRsR OuterProduct, [1],[2] = 5.96e-08 Passed
dRsR Inner product, [-1],[-1] = 2.88e-07 Passed
dRsR Matrix product, [1 -1],[-1 2] = 2.94e-06 Passed
dRsR transposed matrix product, [-1 1],[-1 2] = 3.55e-06 Passed
dRsR Matrix frobenius norm, [-1 -2],[-1 -2] = 3.65e-05 **FAILED***
Warning: dRsR Matrix frobenius norm, [-1 -2],[-1 -2]: failed!

11 Apr 2012 TPROD -- arbitary tensor products between n-d arrays TPROD -- efficiently allows any type of tensor product between 2 multi-dimensional arrays Author: Jason Farquhar Lauwerys, Christophe

Great tool, thanks. (how) would it be possible to create a simulink block with this functionality?
23 Aug 2011 TPROD -- arbitary tensor products between n-d arrays TPROD -- efficiently allows any type of tensor product between 2 multi-dimensional arrays Author: Jason Farquhar Jiang, Fangjun

Please consider re-writing the help text to better explain the syntax. Some examples provided cause syntax error. See the link:
http://www.mathworks.com/matlabcentral/answers/14046-i-didn-t-understand-how-put-the-inputs-in-tprod-function
17 Mar 2011 TPROD -- arbitary tensor products between n-d arrays TPROD -- efficiently allows any type of tensor product between 2 multi-dimensional arrays Author: Jason Farquhar Mark

Those interested in tensor operations may also be interested in the Tensor Toolbox from Sandia National Labs:

http://csmr.ca.sandia.gov/~tgkolda/TensorToolbox/
15 Dec 2010 TPROD -- arbitary tensor products between n-d arrays TPROD -- efficiently allows any type of tensor product between 2 multi-dimensional arrays Author: Jason Farquhar Steven

Invaluable and has become a constantly utilized function for image processing. Have you thought about adding GPU capability?
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matrices, bicoherence, bispctrum, einstein summation, multidimensional multiplication
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09 Mar 2012 TPROD -- arbitary tensor products between n-d arrays TPROD -- efficiently allows any type of tensor product between 2 multi-dimensional arrays Author: Jason Farquhar matrices, einstein summation, multidimensional mult..., tensor product 20 12
  • 5.0
5.0 | 6 ratings
13 Oct 2010 REPOP -- efficient replicating n-d array operations REPOP -- any element-wise operator between different sized n-d matrices without memory copies Author: Jason Farquhar matrices, replicating array ope... 2 2
13 Feb 2003 HOSA - Higher Order Spectral Analysis Toolbox Spectral and polyspectral analysis, and time-frequency distributions. Author: Ananthram Swami bicoherence, bispctrum, hos, statistics, cumulants, help why the bispectr... 143 84
  • 4.5
4.5 | 73 ratings

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