Apply transparency to an imagesc figure

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Raúl
Raúl 2013-4-8
回答： r.vaghefi 2017-9-5
Hi all,
I would like to apply transparency to a figure generated by imagesc (probably, it does affect).
I've seen that the function 'alpha' does that. I've tried the following line but it gets me and error. The image is I3
Code:
imagesc([0.3 0.75], [0.42 1.1], I3);
Line tried:
alpha(I3,'clear',0.1)
Error:
Error using alpha
Too many input arguments.
Error in Monopulse_Multipathv3 (line 175)
alpha(I3,'clear',0.1)
Could somebody help me?
Thanks in advanced.
Raúl.

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采纳的回答

Jan
Jan 2013-4-8
What is "I3"? Dod you read the docs of alpha? You do not find a calling method with 3 inputs there. The error message tells you the same.
  2 个评论
Raúl
Raúl 2013-4-8
I3 is the name of the figure. I've read the doc of alpha but I don't know which arguments to insert or how to do it. I know that the property 'clear' gives you the transparency and the value (in my case 0.1) is the percentage of transparency. I don't know of to write the line.
Thanks.
Raúl
Raúl 2013-4-9
Hi Jan,
Finally I got it. It was easy. The value '0' represents clear, so the command is alpha('0').
Raúl.

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更多回答（1 个）

r.vaghefi
r.vaghefi 2017-9-5
You can use the following code:
imagesc([0.3 0.75], [0.42 1.1], 'AlphaData', .1)

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