Follow 674 views (last 30 days) MathWorks Support Team on 27 Jun 2009. to make a partially transparent histogram in matlab, use the facealpha setting.

This table lists the objects that support transparency and the corresponding properties. alpha facealpha specifies whether to use flat or interpolated transparency across the faces of all patch, chart surface, and primitive surface objects in the axes. This MATLAB function plots a polyshape object. The FaceAlpha property indicates how the transparency of the surface faces are determined from vertex transparency.

for instance, the following code produces the histogram seen above: The obvious explanation is that by manually updating the graphic object’s FaceColor, Matlab automatically updates the hidden property FaceColorMode from ‘auto’ to ‘manual’. The transparency of a surface is defined by its AlphaData property.

The FaceColor property also must be set to 'flat'. First you must specify the AlphaData property as a matrix the same size as the ZData property. Transparent, fancy legends¶.

The 'FaceColor' properties are set to 'interp'. I am creating maps of data using pcolor and vectors overlaid with Quiver. Transparency requires using the OpenGL renderer; none of the other renderers support it.

Add Transparency to Graphics Objects ... A value of 0 means completely transparent, a value of 1 means completely opaque, and values between 0 and 1 are semitransparent.

Control the transparency of an object using the alpha function or by setting properties of the object related to transparency. I now want to overlay a semi-transparent filled in rectangle at a certain location on the image. If the opacity option is used, then markers appear at the bottom (or become transparent), which is an undesired effect. If "FT.facealpha = 0.2" (line 25 of code) is commented out, point markers sit nicely at the top of other objects, as intented. By default, there is no linked variable so the value is an empty character vector, ''. Set the alpha data as either a scalar value or a matrix of values specifying the transparency of each vertex of the surface. Sometimes you know what your data looks like before you plot it, and may know for instance that there won't be much data in the upper right hand corner. I need to have the land and the figure background transparent so these can be overlaid over other maps. Some graphics objects support using a different transparency value for the faces versus the edges of the object. To set the transparency for all objects in the current axes, use the alpha function. … But the OpenGL renderer is defined in such a way that when you have an area (or surface) and a line in the same plane, the order in which they are drawn does not depend upon the order of the commands: OpenGL reorders them as it sees fit. Apparently Matlab colormap only works with RGB notations, not RGBa. I can't find a way to make the figure with a transparent facecolor save as it appears onscreen. It would be helpful to create a transparent, rectangular patch with rounded corners.

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'interp' — Use interpolated transparency for each face based on the values in AlphaData property.

Matlab : put transparancy on a bar plot. is there a workaround to create, for example, a transparent yellow? MATLAB evaluates the variable in the base workspace to generate the XData.

Now the transparency settings are preserved, even when the figure is printed, saved, exported, resized etc. Now the transparency settings are preserved, even when the figure is printed, saved, exported, resized etc.

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