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Paul
Posts:
17
Registered:
5/18/11


Re: How to retrieve the given column of the data of arbitrary size?
Posted:
Nov 18, 2012 6:14 PM


"Steven_Lord" <slord@mathworks.com> wrote in message <k80civ$n39$1@newscl01ah.mathworks.com>... > > > "Jan Simon" <matlab.THIS_YEAR@nMINUSsimon.de> wrote in message > news:k7thlr$qm2$1@newscl01ah.mathworks.com... > > Dear Bruno, > >> ind = {':', 3, ':', ':' }; > >> A3=squeeze(A(ind{:})) > > > > I like this method. It is used in Matlab's toolbox functions, but is it > > documented also? > > I don't believe it's explicitly documented. This is about as close as the > documentation gets to describing that behavior. > > http://www.mathworks.com/help/matlab/matlab_oop/indexedreferenceandassignment.html#br09e971 > > " A colon used as an index is passed in the cell array as the string ':'. " > >  > Steve Lord > slord@mathworks.com > To contact Technical Support use the Contact Us link on > http://www.mathworks.com
One would think that this behavior (and any other aspects of indexing for Matlab arrays) should be documented here: http://www.mathworks.com/help/matlab/math/matrixindexing.html
Also, (at least in earlier versions of Matlab), indexing with characters is allowed, like this: A('a') and A('ab'). Since that wasn't documented, it's not clear if that's supposed to be legal syntax. Further confusing the issue is that A('a') and A(':') are treated inconsistently. The former returns a single element of A (converting 'a' to its ASCII code I believe) and the latter returns all of A.



