quad2d sfit
in [Matlab]
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From: Aaron on 17 Sep 2009 12:06 Hi All, I am looking to integrate the area under a surface fit. I searched for a method to do this and found a page on qyad2d http://www.mathworks.com/access/helpdesk/help/toolbox/curvefit/index.html?/access/helpdesk/help/toolbox/curvefit/quad2d.html which claimed the function quad2d will "Numerically integrate sfit object" However when I try to run it I get the error message "First input argument must be a function handle." Can anyone explain to me why this is happening, do I need a more recent version of Matlab? Thanks, A
From: Steven Lord on 17 Sep 2009 13:09 "Aaron " <macraiga(a)gmail.com> wrote in message news:h8tmp9$4ic$1(a)fred.mathworks.com... > Hi All, > > I am looking to integrate the area under a surface fit. I searched for a > method to do this and found a page on qyad2d > http://www.mathworks.com/access/helpdesk/help/toolbox/curvefit/index.html?/access/helpdesk/help/toolbox/curvefit/quad2d.html > > which claimed the function quad2d will "Numerically integrate sfit object" > > However when I try to run it I get the error message > > "First input argument must be a function handle." > > Can anyone explain to me why this is happening, do I need a more recent > version of Matlab? The QUAD2D method for surface fit (sfit) objects was introduced in version 2.1 of Curve Fitting Toolbox, which was part of release R2009b. http://www.mathworks.com/access/helpdesk/help/toolbox/curvefit/rn/br5i38t-1.html If you're using an older version of the toolbox, MATLAB interprets that code as a call to the QUAD2D _function_ which expects its first input to be a function handle. As a workaround, write: quad2d(@(x, y) mySFITobject(x, y), lowerXlimit, upperXlimit, lowerYlimit, upperYlimit) making the obvious substitutions. If you are using this version of the toolbox, post how you're calling QUAD2D on the sfit object. -- Steve Lord slord(a)mathworks.com comp.soft-sys.matlab (CSSM) FAQ: http://matlabwiki.mathworks.com/MATLAB_FAQ
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