Array

Create

Action	Code	Details
Declare 1D array of length N	real a[N];
Declare 1D array with zeros	real a[N] = rep_array(0, N);
Declare 1D array with values	real a[] = {1, 2, 5}
Declare 2D array of size N by M	real a[N,M];
Declare 2D array with values	int b[2, 3] = { { 1, 2, 3 }, { 4, 5, 6 } };
Declare 3D array of size N by M by O	real a[N,M,O];

Properties

Action	Code	Details
Dimensions	dims(a)
Size of first dimension	size(a)	real a[4,3]; then size(a) = 4
Number of elements	num_elements(a)

Derive

Grow

Action	Code	Details
Append array	append_array(x, y)

Convert

Action	Code	Details
To 1D array	to_array_1d(a)
To 2D array	to_array_2d(a)
To vector	to_vector(a)
To matrix	to_matrix(a)
1D array to matrix of size (column-major order)	to_matrix(a, nrow, ncol)