Why command "edge" do not working with argument "canny"??

bw1 = edge(I,'canny');
I need to use canny edge but it is not working as "sobel" and "prewitt" in previous command!!

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Walter Roberson
Walter Roberson 2016 年 5 月 3 日
It works for me in R2016a. Which version are you using?
Abdelrahiem  Hashem
Abdelrahiem Hashem 2016 年 5 月 4 日
R2013a, but when I explored help for "canny" I found information.

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2016 年 5 月 3 日

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