custom mask size for canny edge detection

Task: To perform on an image canny edge detection with sigma = 2 , threshold = 0.05~0.15 , mask size is 13*13

My code

f = edge(img ,'canny',[0.05 0.15],2);

Question: How to change the code in order to make the mask size for the canny edge detection = 13*13?

Answer 1

[Image Analyst]

That's not a parameter you can change with the edge function. Why do you think you need to? What's wrong with the edges it gave you?

[John Snow]

Nothing is wrong with the edges it gave me but the result doesn't match the book 100% and the mask size is the only reason left.

[John Snow]

Edit:I don't need this anymore thanks for your constant help within the site