substituting variables for meshgrid variables

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Roger Kueng 2011-11-7

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/20599-substituting-variables-for-meshgrid-variables

Good Day,

For my studies I wanted to substitue some symbols, it works fine but the following line doesn't work:

u = 0:0.2:5;
v = u;
[U,V] = meshgrid(u,v);
subs((a1.*y.^2)./(1+y.^2)-x,{x,y},{U,V});

if i substitute the variables x and y with "normal vectors it works fine but not with the meshgrid:

??? Error using ==> horzcat
CAT arguments dimensions are not consistent.
Error in ==> sym.subs>@(x)[char(x),','] at 246
    s = cellfun(@(x)[char(x) ','],X,'UniformOutput',false);
Error in ==> sym.subs>getNames at 246
    s = cellfun(@(x)[char(x) ','],X,'UniformOutput',false);
Error in ==> sym.subs>tryFunctionHandle at 190
xvarnames = getNames(X);
Error in ==> sym.subs>mupadsubs at 137
[G,worked] = tryFunctionHandle(F,X,Y);
Error in ==> sym.subs at 125
G = mupadsubs(F,X,Y);