Follow the contour line
in [Matlab]
|
Prev: Graphing
Next: Real-Time Color Tracking Particle Filter
From: Jie Zhang on 22 Jun 2010 18:12 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. 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, OR, how to control the output.
From: someone on 22 Jun 2010 22:34 "Jie Zhang" <xyzhangj(a)gmail.com> wrote in message <hvrcfo$6t$1(a)fred.mathworks.com>... > I am trying to follow a contour line with the matlab built-in function contourc: > C = contourc(x_vec,y_vec,z,[value,value]) > The returned matrix size and grids are chosen automatically, which is not what I want. > The source code for this function does not come along with matlab. > I am wondering if it's possible to get the source code for such built-in functions and modify, OR, how to control the output. What is it that you wish to do that you can't with clabel or the Contourgroup Properties?
From: Jie Zhang on 23 Jun 2010 10:26 "someone" <someone(a)somewhere.net> wrote in message <hvrrrg$o94$1(a)fred.mathworks.com>... > "Jie Zhang" <xyzhangj(a)gmail.com> wrote in message <hvrcfo$6t$1(a)fred.mathworks.com>... > > I am trying to follow a contour line with the matlab built-in function contourc: > > C = contourc(x_vec,y_vec,z,[value,value]) > > The returned matrix size and grids are chosen automatically, which is not what I want. > > The source code for this function does not come along with matlab. > > I am wondering if it's possible to get the source code for such built-in functions and modify, OR, how to control the output. > > What is it that you wish to do that you can't with > clabel or the Contourgroup Properties? Thank you for the reply. The issue is "contourc" is a "low-level" built-in function; "clabel" uses its output; "Contourgroup Properties" are used for plotting contour.--what I wish to do is simply to get the series of (x,y) coordinates following a specific contour line. I think I got the solution, although it's not perfect: interplating the contour matrix output by "contourc"--lucky enough, it seems to have high enough spatial resolution. Thanks again.
From: Jie Zhang on 23 Jun 2010 10:30 "someone" <someone(a)somewhere.net> wrote in message <hvrrrg$o94$1(a)fred.mathworks.com>... > "Jie Zhang" <xyzhangj(a)gmail.com> wrote in message <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. > > 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, OR, how to control the output. > > What is it that you wish to do that you can't with > clabel or the Contourgroup Properties?
From: Steven Lord on 23 Jun 2010 10:31
"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 |