Follow the contour line
in [Matlab]
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From: Jie Zhang on 23 Jun 2010 10:56 "Steven Lord" <slord(a)mathworks.com> wrote in message <hvt5re$s6o$1(a)fred.mathworks.com>... > > "Jie Zhang" <xyzhangj(a)gmail.com> wrote in message > news:hvrcfo$6t$1(a)fred.mathworks.com... > >I am trying to follow a contour line with the matlab built-in function > >contourc: > > C = contourc(x_vec,y_vec,z,[value,value]) > > The returned matrix size and grids are chosen automatically, which is not > > what I want. > > Huh? What _do_ you want, then? > > > The source code for this function does not come along with matlab. I am > > wondering if it's possible to get the source code for such built-in > > functions and modify > > We don't release the source code for built-in functions. > > >, OR, how to control the output. > > That depends -- what are you trying to have it do? > > -- > Steve Lord > slord(a)mathworks.com > comp.soft-sys.matlab (CSSM) FAQ: http://matlabwiki.mathworks.com/MATLAB_FAQ > To contact Technical Support use the Contact Us link on > http://www.mathworks.com > Thank you, Steve. What I originally want to do is to control the spatial resolution of the output contour matrix, i.e. how many (x,y) pairs on a closed contour line. Now I use the interpolation to improve the spatial resolution. It works ok, so far.
From: Christophe Lauwerys on 23 Jul 2010 08:37
"Jie Zhang" <xyzhangj(a)gmail.com> wrote in message <hvt7a6$5ct$1(a)fred.mathworks.com>... > "Steven Lord" <slord(a)mathworks.com> wrote in message <hvt5re$s6o$1(a)fred.mathworks.com>... > > > > "Jie Zhang" <xyzhangj(a)gmail.com> wrote in message > > news:hvrcfo$6t$1(a)fred.mathworks.com... > > >I am trying to follow a contour line with the matlab built-in function > > >contourc: > > > C = contourc(x_vec,y_vec,z,[value,value]) > > > The returned matrix size and grids are chosen automatically, which is not > > > what I want. > > > > Huh? What _do_ you want, then? > > > > > The source code for this function does not come along with matlab. I am > > > wondering if it's possible to get the source code for such built-in > > > functions and modify > > > > We don't release the source code for built-in functions. For histc for instance you do supply the source code. So what is the criterion that determines whether it is released or not? Christophe > > > > >, OR, how to control the output. > > > > That depends -- what are you trying to have it do? > > > > -- > > Steve Lord > > slord(a)mathworks.com > > comp.soft-sys.matlab (CSSM) FAQ: http://matlabwiki.mathworks.com/MATLAB_FAQ > > To contact Technical Support use the Contact Us link on > > http://www.mathworks.com > > > > Thank you, Steve. > What I originally want to do is to control the spatial resolution of the output contour matrix, i.e. how many (x,y) pairs on a closed contour line. > Now I use the interpolation to improve the spatial resolution. It works ok, so far. |