Learning Julia

Working with matrices

In the preceding section, we worked with arrays and operations on them. It is also possible to create two-dimensional arrays or matrices. There is a small difference in the syntax that helps to create these matrices:

# this will create an arrayjulia> X = [1, 1, 2, 3, 5, 8, 13, 21, 34]9-element Array{Int64,1}: 1 1…# constructing a matrixjulia> X = [1 1 2; 3 5 8; 13 21 34]3×3 Array{Int64,2}: 1   1   2 3   5   813  21  34

The difference is that we didn’t provide "," (comma) between the elements and separated the rows of the matrix using a ";" (semicolon). This type of indexing is called column order.