如何在给定区域填充颜色
如何在给定区域填充颜色 FILL Filled 2-D polygons.FILL(X,Y,C) fills the 2-D polygon defined by vectors X and Y
with the color specified by C.The vertices of the polygon
are specified by pairs of components of X and Y.If necessary,
the polygon is closed by connecting the last vertex to the first.
If C is a single character string chosen from the list 'r','g','b',
'c','m','y','w','k', or an RGB row vector triple, , the
polygon is filled with the constant specified color.
If C is a vector the same length as X and Y, its elements are
scaled by CAXIS and used as indices into the current COLORMAP to
specify colors at the vertices; the color within the polygon is
obtained by bilinear interpolation in the vertex colors.
If X and Y are matrices the same size, one polygon per column
is drawn. In this case, C is a row vector for "flat" polygon
colors, and C is a matrix for "interpolated" polygon colors.
If either of X or Y is a matrix, and the other is a column vector
with the same number of rows, the column vector argument is
replicated to produce a matrix of the required size.
FILL(X1,Y1,C1,X2,Y2,C2,...) is another way of specifying
multiple filled areas.
FILL sets the PATCH object FaceColor property to 'flat', 'interp',
or a colorspec depending upon the value of the C matrix.
H = FILL(...) returns a column vector of handles to PATCH objects,
one handle per patch. The X,Y,C triples can be followed by
parameter/value pairs to specify additional properties of the patches.
See also PATCH, FILL3, COLORMAP, SHADING. 用fill或者fill3，具体可以看帮助
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