Plotting 4dimentional data error

2 次查看（过去 30 天）
james
james 2012-3-14
Hi all I'm trying to plot the data to see the global minimum point. I'm presented with the equation
C = (1.10471.*((Z).^2)*((X).^2))+(0.0481*(Y*Z)*14*X);
my first issue is that when I try to produce a plot of this I get the error
??? Error using ==> mtimes Inputs must be 2-D, or at least one input must be scalar.
Error in ==> Untitled4 at 5 C = (1.10471.*((Z).^2)*((X).^2))+(0.0481*(Y*Z)*14*X);
My code is x = -10:1:10; y = -10:1:10; z = -10:1:10; [X,Y,Z] = meshgrid(x,y,z); C = (1.10471.*((Z).^2)*((X).^2))+(0.0481*(Y*Z)*14*X); surf(X,Y,Z,C); hold on; axis([-10 10 -10 10 10 10]);
Many thanks

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采纳的回答

james
james 2012-3-14
I changed my code to allow for this and still get the mistake!
x = -9:1:10;
y = -9:1:10;
z = -9:1:10;
[X,Y,Z] = meshgrid(x,y,z);
C = (1.10471.*((Z).^2)*((X).^2))+(0.0481*(Y.*Z)*14*X);
surf(X,Y,Z,C);
hold on;
axis([-10 10 -10 10 10 10]);

更多回答（1 个）

Sean de Wolski
Sean de Wolski 2012-3-14
))+(0.0481*(Y*Z)*14*X);
))+(0.0481*(Y.*Z)*14*X);
Note difference:
doc vectorize
to avoid these errors in the future.
  2 个评论
james
james 2012-3-14
Should this be done after every vector?
Sean de Wolski
Sean de Wolski 2012-3-14
Whenever you get a error using {mtimes, mrdivide, mpower, mldivide}
and you don't want to be doing element-by-element multiplication.

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