以下代码会产生错误：

Warning: Dimensions of AlphaData must be 1x1, or must match CData.

问题是CData是彩色图像，因此有3个维度，alphadata是透明度数据矩阵abd，因此有2个维度。

red = cat(3, ones(512), zeros(512), zeros(512));

mask = [];

bounds = data(currow,1:6);

if slice >= bounds(5) && slice <= bounds(6)

mask = zeros(size(segmask,1),size(segmask,2));

mask(bounds(1)-4:bounds(2)+4,bounds(4)+4:bounds(4)+5) = 1;

mask(bounds(2)+4:bounds(2)+5,bounds(3)-4:bounds(4)+4) = 1;

end

imshow(low(:,:,slice),[WL-WW/2 WL+WW/2])

hold on

h = imshow(red);

set(h, 'AlphaData', 0.3*mask);

hold off这里是来自Matlab文档的AlphaData和CData的信息

AlphaData m-by-n matrix of double or uint8

Transparency data. A matrix of non-NaN values specifying the

transparency of each face or vertex of the object. The AlphaData can

be of class double or uint8.

MATLAB software determines the transparency in one of the following

ways:

Using the elements of AlphaData as transparency values

(AlphaDataMapping set to none)

Using the elements of AlphaData as indices into the current alphamap

(AlphaDataMapping set to direct)

Scaling the elements of AlphaData to range between the minimum and

maximum values of the axes ALim property (AlphaDataMapping set to

scaled, the default)

CData

matrix | m-by-n-by-3 array

The image data. A matrix or 3-D array of values specifying the color

of each rectangular area defining the image. image(C) assigns the

values of C to CData. MATLAB determines the coloring of the image in

one of three ways:

Using the elements of CData as indices into the current colormap (the

default) (CDataMapping set to direct)

Scaling the elements of CData to range between the values

min(get(gca,'CLim')) and max(get(gca,'CLim')) (CDataMapping set to

scaled)

Interpreting the elements of CData directly as RGB values (true color

specification)

Note that the behavior of NaNs in image CData is not defined. See the

image AlphaData property for information on using transparency with

images.

AlphaData和CData如何可能具有smae维度？

如果红色是512x512x3并且mask是512x512，并且除了警告代码似乎按预期工作。