[英]coloring 3D plots on MATLAB
I made two 3D plots on the same axis.我在同一轴上绘制了两个 3D 图。 now I desire to give them different colors for easy identification.
现在我想给他们不同的 colors 以便于识别。 How do I do this coloring?
我该怎么做这个着色? The MATLAB code is shown below.
MATLAB 代码如下所示。
tic
Nx = 50;
Ny = 50;
x = linspace(0,1,Nx);
y = linspace(0,0.5,Ny);
[X,Y] = meshgrid(x,y);
[M,N] = size(X);
for m=1:M
for n=1:N
%get x,y coordinate
x_mn = X(m,n);
y_mn = Y(m,n);
%%% X=D2 and Y=D1
%Check if x_mn and y_mn satisfy requirement
if(x_mn >= y_mn)
%evaluate function 1
Z(m,n) = (x_mn^2 - 2*x_mn*y_mn + y_mn^2);
Z_1(m,n) = (x_mn^2);
elseif(x_mn < y_mn)
%evaluate function 2
Z(m,n) = 0;
Z_1(m,n) = (x_mn^2);
%% Z(m,n) = 2*(2*x_mn*y_mn + y_mn - y_mn^2 - 2*x_mn);
else
Z(m,n) = 0;
end
end
end
%Plot the surface
figure
surf(X,Y,Z) %first plot
surfc(X,Y,Z)
hold on
surf(X,Y,Z_1) %second plot
xlabel('Dm');
ylabel('D');
zlabel('pR');
grid on
shading interp
toc
disp('DONE!')
How can I create two differently colored surfaces?如何创建两个不同颜色的表面?
figure
surf(X,Y,Z) %first plot
surfc(X,Y,Z)
hold on
surf(X,Y,Z_1)
Your surfc()
call actually overwrites your surf()
call, is this intended?您的
surfc()
调用实际上覆盖了您的surf()
调用,这是故意的吗?
As to your colour: the documentation is a marvellous thing:至于你的颜色:文档是一件了不起的事情:
surfc(X,Y,Z,C)
additionally specifies the surface color.surfc(X,Y,Z,C)
还指定表面颜色。
In other words: just specify the colour as you want it.换句话说:只需指定您想要的颜色即可。
C
needs to be a matrix of size(Z)
with the desired colours, ie set all of them equal to create an monocoloured surface: C
需要是具有所需颜色的size(Z)
的矩阵,即将它们全部设置为相等以创建单色表面:
x = 1:100;
y = 1:100;
z = rand(100);
figure;
surfc(x,y,z,ones(size(z)))
hold on
surfc(x,y,z+6,ones(size(z))+4)
Results in (MATLAB R2007b, but the syntax is the same nowadays)结果为(MATLAB R2007b,但如今语法相同)
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