matlab画三维图问题 [N1,N2,a0b]=meshgrid(linspace(0,100));val=(N1.cos(a0b))^2-(N2+2).^2-(N2+N2).^2+2.(N2+2).(N1+N2).cos(arccos(N2.*cos(a0b)/(N2+2)-a0b));?Error using ==> mpowerInput arguments must be 2-D.哪里出错啦

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matlab画三维图问题 [N1,N2,a0b]=meshgrid(linspace(0,100));val=(N1.*cos(a0b))^2-(N2+2).^2-(N2+N2).^2+2.*(N2+2).*(N1+N2).*cos(arccos(N2.*cos(a0b)/(N2+2)-a0b));?Error using ==> mpowerInput arguments must be 2-D.哪里出错啦
matlab画三维图问题
[N1,N2,a0b]=meshgrid(linspace(0,100));val=(N1.*cos(a0b))^2-(N2+2).^2-(N2+N2).^2+2.*(N2+2).*(N1+N2).*cos(arccos(N2.*cos(a0b)/(N2+2)-a0b));?Error using ==> mpower
Input arguments must be 2-D.哪里出错啦

matlab画三维图问题 [N1,N2,a0b]=meshgrid(linspace(0,100));val=(N1.*cos(a0b))^2-(N2+2).^2-(N2+N2).^2+2.*(N2+2).*(N1+N2).*cos(arccos(N2.*cos(a0b)/(N2+2)-a0b));?Error using ==> mpowerInput arguments must be 2-D.哪里出错啦
[X,Y,Z] = meshgrid(xgv,ygv,zgv) replicates the grid vectors xgv, ygv, zgv to produce the coordinates of a 3D rectangular grid (X, Y, Z). The grid vectors xgv,ygv,zgv form the columns of X, rows of Y, and pages of Z respectively. (X,Y,Z) are of size numel(ygv)-by-numel(xgv)-by(numel(zgv).

[X,Y,Z] = meshgrid(gv) is equivalent to [X,Y,Z] = meshgrid(gv,gv,gv).

> 储运天天

有这种用法,建立三维meshgrid

> zero1052547116

我不是很理解你想画什么样的三维图,

但就你发出来的代码要改的部分有2点：

1、如果你不是进行矩阵运算的话,乘号、除号、次方的左边要加上点

2、arccos函数在matlab中是acos

修改如下：

[N1,N2,a0b]=meshgrid(linspace(0,100));

val=(N1.*cos(a0b)).^2-(N2+2).^2-(N2+N2).^2+2.*(N2+2).*(N1+N2).*cos(acos(N2.*cos(a0b)./(N2+2)-a0b));

至少单凭这两句不会报错了

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