matlab contour问题

发布网友发布时间：2022-05-15 19:07

共2个回答

热心网友时间：2024-02-27 05:17

怎样从Ｃ中提取出轮廓信息？Ａ：matlab网站上Duane Hanselman分享了一个.m函数来解决这个问题- Extract contour data from contour matrix C。链接。该函数如下：function s=contourdata(c)% S = CONTOURDATA(C) extracts the (x,y) data pairs describing each contour% line and other data from the contour matrix C. The vector array structure% S returned has the following fields:%% S(k).level contains the contour level height of the k-th line.% S(k).numel contains the number of points describing the k-th line.% S(k).isopen is True if the k-th contour is open and False if it is closed.% S(k).xdata contains the x-axis data for the k-th line as a column vector.% S(k).ydata contains the y-axis data for the k-th line as a column vector.%% For example: PLOT(S(k).xdata,S(k).ydata)) plots just the k-th contour.if nargin<1 || ~isfloat(c) || size(c,1)~=2 || size(c,2)<4'Input Must be the 2-by-N Contour Matrix C.')endtol=1e-12;k=1; % contour line numbercol=1; % index of column containing contour level and number of pointswhile col<size(c,2); % while less than total columns in cs(k).level = c(1,col); %#ok
是否可以解决您的问题？追问没有看懂！

热心网友时间：2024-02-27 05:17

就是要画等于0的等值线

这个参数有很多种选择，例如输入一个数n，
那么contour自动平均分配n个值画n条等值线

也可以输入一个向量[v1 v2 v3....vn]指定需要的n个值

如果你只需要一个值，如果只输入v1 ，函数还以为是要v1条等值线
所以这时候用[ v1 v1]表示只要v1这个值的等值线