Difference in TriSurf and Surf - Adding Two trisurf plot on one graph.

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Afz
Afz 2012-12-9
I uses this to get a surface plot between three variables. My data was in one column.
trisurf(tri,x,y,z)
But when I use Surf(x,y,z) it gives error "??? Undefined function or variable 'X'."
Also I have 10 sets of data how can I plot more than one surface on one graph in a different color.

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回答（1 个）

Walter Roberson
Walter Roberson 2012-12-9
Note that MATLAB is case-sensitive, so if you defined a variable "x" then "X" is a different variable. Also, Surf() would be different than surf()
Please show your exact code.
To plot multiple surfaces, use "hold on" after the first plot. You can pass color information to surf()
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Walter Roberson
Walter Roberson 2012-12-9
surf() is simply not designed to handle vectors of X, Y, Z. It is designed for working on grids of data.
It is not clear to me why you are looking to use surf() when you are already using trisurf() ? If there is a good reason to use surf() instead, then see TriScatteredInterp
indata = xlsread('YourFileName.xls');
x = indata(1:26, 1);
y = indata(2:27, 2);
z = indata(3:28, 3);
Walter Roberson
Walter Roberson 2012-12-18
contour() requires grids of data too. You need exactly the same preparation work for contour() that you need for surf()

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