Syntax changes

• place strings in double quotes: 'hello' -> "hello"
• indexes uses square brackets
• functions always end with end
• beware Julia does much less copies than Matlab/Octave (e.g. during assignmement, reshape, ...)

a = [1,2,3]
b = a
b[1] = 0
# a[1] is now 0 too!

• [1:3] is valid but it is an array of a range (Array{UnitRange{Int64},1}) in Julia. If you want an array of number from 1 to 3, use [1:3;] (returning an array) or 1:3 (returning a range).

• operator precedence is different. In matlab true & 3 < 2 is evaluated as true & (3 < 2) and is thus false, while in Julia (version 0.5.0), true & 3 < 2 is evaluated as (true & 3) < 2 and is true (since true & 3 is 1). Here is more information about operator precedence in julia and matlab. In Julia, true && 3 < 2 returns false, as expected.

Interpolation

mif = interpn(x,y,m,Xi,Yi);

itp = interpolate((x,y), Int.(mask),Gridded(Linear()))
mif = itp[Xi[:,1],Yi[1,:]];

Other

• use NullableArray instead of NaN for missing values (https://github.com/JuliaStats/NullableArrays.jl)
• print -> saveas
• remove "shading flat"
• function calls: clf -> clf()

See also http://docs.julialang.org/en/stable/manual/noteworthy-differences/.