making an independent copy of a matlab object
in [Matlab]
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From: Daniel on 19 Jun 2008 10:29 Thanks a ton for the posts. That's exactly what I'm looking for. However, the call to "p = properties(this)" returns the following error: _______________________________________________________ ??? Undefined function or method 'properties' for input arguments of type 'stage'. Error in ==> stage.stage>stage.copy at 120 p = properties(this); _______________________________________________________ Is properties an automatic property of the class? Matlab doesn't seem to know what it is. Thanks, Daniel
From: Douglas Schwarz on 19 Jun 2008 10:47 "Daniel " <anothermathgeek+matlab(a)gmail.com> wrote in message <g3dqfd$6sa$1(a)fred.mathworks.com>... > Thanks a ton for the posts. That's exactly what I'm looking > for. However, the call to "p = properties(this)" returns the > following error: > _______________________________________________________ > ??? Undefined function or method 'properties' for input > arguments of type 'stage'. > > Error in ==> stage.stage>stage.copy at 120 > p = properties(this); > _______________________________________________________ > > Is properties an automatic property of the class? Matlab > doesn't seem to know what it is. > > Thanks, > Daniel Hi Daniel, I assumed you were using R2008a -- perhaps properties is a new feature in that version. Try using fieldnames instead. It should work the same way. p = fieldnames(this); -- Doug Schwarz dmschwarz&ieee,org Make obvious changes to get real email address.
From: Daniel on 19 Jun 2008 11:52 Yes, I'm still in the dark ages here (R2007a). 'fieldnames' did the trick. Thanks a ton!
From: M. on 15 Jul 2008 15:25 > > I don't see an easy way to copy hidden properties other than by listing > them in the copy method, e.g., > > new.a_hidden = this.a_hidden; > new.b_hidden = this.b_hidden; > > etc. or perhaps just building the p = properties(this) cell array > manually. > > -- > Doug Schwarz > dmschwarz&ieee,org > Make obvious changes to get real email address. I created another method to find the hidden properties in a class. It hasn't been rigorously tested, but it might be useful to some, so here it is: function hiddenProps = findHidden(this) fid = fopen( which( class(this) ) ); if fid < 0 hiddenProps = {}; return end hiddenProps = {}; foundHidden = 0; while ~feof(fid) ln = fgetl( fid ); if ~isempty( regexpi( ln, '\s*properties\s*\(\s*Hidden\s*\)' ) ) foundHidden = 1; continue end if foundHidden == 1; if ~isempty( regexpi( ln, '\s*end' ) ) break end if isempty( regexpi( ln, '\w*' ) ) continue end hiddenProps{end+1} = strtrim( strtok( ln, '=' ) ); hiddenProps{end} = strtrim( strtok( hiddenProps{end}, ';' ) ); else continue end end fclose( fid ); end % END FINDHIDDEN method
From: M. on 15 Jul 2008 15:25
> > I don't see an easy way to copy hidden properties other than by listing > them in the copy method, e.g., > > new.a_hidden = this.a_hidden; > new.b_hidden = this.b_hidden; > > etc. or perhaps just building the p = properties(this) cell array > manually. > > -- > Doug Schwarz > dmschwarz&ieee,org > Make obvious changes to get real email address. I created another method to find the hidden properties in a class. It hasn't been rigorously tested, but it might be useful to some, so here it is: function hiddenProps = findHidden(this) fid = fopen( which( class(this) ) ); if fid < 0 hiddenProps = {}; return end hiddenProps = {}; foundHidden = 0; while ~feof(fid) ln = fgetl( fid ); if ~isempty( regexpi( ln, '\s*properties\s*\(\s*Hidden\s*\)' ) ) foundHidden = 1; continue end if foundHidden == 1; if ~isempty( regexpi( ln, '\s*end' ) ) break end if isempty( regexpi( ln, '\w*' ) ) continue end hiddenProps{end+1} = strtrim( strtok( ln, '=' ) ); hiddenProps{end} = strtrim( strtok( hiddenProps{end}, ';' ) ); else continue end end fclose( fid ); end % END FINDHIDDEN method |