Comments on: Make Code N-D Safe http://blogs.mathworks.com/loren/2007/07/06/make-code-n-d-safe/ Loren Shure works on design of the MATLAB language at MathWorks. She writes here about once a week on MATLAB programming and related topics. Thu, 09 Feb 2012 04:19:21 +0000 hourly 1 http://wordpress.org/?v=3.2.1 By: Loren http://blogs.mathworks.com/loren/2007/07/06/make-code-n-d-safe/#comment-16307 Loren Fri, 06 Jul 2007 18:14:37 +0000 http://blogs.mathworks.com/loren/2007/07/06/make-code-n-d-safe/#comment-16307 Jeremy- You are right about size, of course. But it is still possible that your code, if dependent on n for pre-allocation, for instance, will be incorrect for N-dimensional inputs. Urs- Thanks for the list. --Loren Jeremy-

You are right about size, of course. But it is still possible that your code, if dependent on n for pre-allocation, for instance, will be incorrect for N-dimensional inputs.

Urs-

Thanks for the list.

–Loren

]]> By: Urs (us) Schwarz http://blogs.mathworks.com/loren/2007/07/06/make-code-n-d-safe/#comment-16306 Urs (us) Schwarz Fri, 06 Jul 2007 16:42:12 +0000 http://blogs.mathworks.com/loren/2007/07/06/make-code-n-d-safe/#comment-16306 there are a few helpers, which should not be discarded and often are very useful for preliminary error checking procedures help isempty help isscalar help isvector help ndims us there are a few helpers, which should not be discarded and often are very useful for preliminary error checking procedures
help isempty
help isscalar
help isvector
help ndims
us

]]> By: mark http://blogs.mathworks.com/loren/2007/07/06/make-code-n-d-safe/#comment-16305 mark Fri, 06 Jul 2007 16:33:29 +0000 http://blogs.mathworks.com/loren/2007/07/06/make-code-n-d-safe/#comment-16305 I suppose matlab arrays aren't tensors. However, has there been any discussion about implementing tensor algebra, or can it be done with dimension arguments? For instance, in some circumstances, one might like to consider the column and row dimensions as both being 1 with a new argument to indicate dual space. I suppose matlab arrays aren’t tensors. However, has there been any discussion about implementing tensor algebra, or can it be done with dimension arguments? For instance, in some circumstances, one might like to consider the column and row dimensions as both being 1 with a new argument to indicate dual space.

]]> By: Jeremy http://blogs.mathworks.com/loren/2007/07/06/make-code-n-d-safe/#comment-16304 Jeremy Fri, 06 Jul 2007 16:32:31 +0000 http://blogs.mathworks.com/loren/2007/07/06/make-code-n-d-safe/#comment-16304 Actually, if one calls "[m,n] = size(input)" where input has more than 2 dimensions, n is not a vector. It is simply a product of the remaining dimension sizes. Actually, if one calls “[m,n] = size(input)” where input has more than 2 dimensions, n is not a vector. It is simply a product of the remaining dimension sizes.

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