Consider the code below. function dummy() A = zeros(2,2) for i=1:2 for j=1:2 A(i,j) = rand() # should be A[i,j] end end return A end It returns julia> A=dummy() A (generic function with 1 method) which is very weird, since in the REPL writing A(i,j) in…

Never mind! I figured it out. It’s the inline function definition syntax tripping me up. A(i,j) = rand() is defining a function that maps its 2 args to a random number. This is a nasty “gotcha” for ex Matlab prorgammers to be aware of!

A(i,j) instead of A[i,j] leads to weird behavior

General Usage

bennedich January 28, 2019, 10:02pm 3

You’re not the only one:

1 Like

Topic		Replies	Views
No error when using () for indexing inside a loop General Usage	2	443	January 23, 2019
Difference between indexing a for loop New to Julia	11	1960	June 19, 2017
Why x[[1,2]] = [0,0] works? General Usage question	2	649	December 13, 2018
Suprising assignment behavior General Usage	8	517	January 20, 2017
I don't understand why or how y(:,i) = x creates a function New to Julia question , syntax , function	6	590	April 13, 2021

A(i,j) instead of A[i,j] leads to weird behavior

Related topics