ERROR: Z must be a matrix, not a scalar or vector

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David Miller
David Miller 2016-7-27
回答： John D'Errico 2016-7-27
Grid = linspace(0,2*pi);
xAxis = (prams.Radius + prams.radius*cos(Grid)).*cos(Grid);
yAxis = (prams.Radius + prams.radius*cos(Grid)).*sin(Grid);
zAxis = prams.radius.*sin(Grid);
surf(xAxis,yAxis,zAxis);
hold on;
Why is it throwing the error: Z must be a matrix,not a scalar or vector

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John D'Errico
John D'Errico 2016-7-27
READ THE ERROR MESSAGE.
What is the variable grid? (Hint, a vector)
What shape are each of the variables xAxis, yAxis, zAxis? Note that the shape of the vector GRID propagates through these computations. So they are vectors also.
Now re-read the error message. Surf requires an array. You passed it a vector. What you really wanted to do, we cannot know.

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