File Exchange Pick of the Week

November 21st, 2007

First, be sure to check out the new home of LazyWeb. We had three of the challenges closed, but there are three still open. We are sending out MATLAB prize packages to all that solved a challenge, and look forward to sending out more as the rest are tackled.

Here is a three and a half minute video that shows how to set transparency based on data values. I tagged this as a practical example because it was a case that
came into Technical Support here at The MathWorks and I was called in to help, but I also think it is an advanced technique.

This technique can be useful if you want to chop off the data that is in a certain range to make other data easier to see. Do you have other uses for this too?

Find the files here.

PodCast here

Other videos have been gathered here:
http://blogs.mathworks.com/pick/category/video/

Practical example videos have been gathered here:
http://blogs.mathworks.com/pick/category/practical-example

14:14 UTC | Posted in Advanced MATLAB, Practical example, Video | Permalink | 2 Comments »

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2 Responses to “Practical example: Setting transparency on a patch”

1. Chris replied on January 11th, 2010 at 17:59 UTC :
   

   Do you know how to implement scaled alpha values for all points/values in a 3D plot? Say W=f(x,y,z), and we want to plot a 3D figure for coordinates (x,y,z), making each point transparent according to its f(x,y,z) magnitude?

2. Doug replied on January 11th, 2010 at 18:09 UTC :
   

   Why not just make alpha a matrix the size of the data instead of a scalar? Is this what you mean?

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<pre class="code">
a = magic(3);
sum(a)
</pre>

These postings are the author's and don't necessarily represent the opinions of The MathWorks.