The dimensions operator lists array dimensions.

Synopsis

dimensions(named_array);

Summary

The argument to the dimensions operator is the name of an array. It returns an array with one row per dimension, and the following attributes for each dimension:

name
start index
length
chunk size
chunk overlap
low boundary index
high boundary index
data type

The argument named_array must be a previously-created and stored array in SciDB.

Example

To create an array with three dimensions, do the following:

AFL% CREATE ARRAY array1 <val:double>[i=0:1999:0:100; j=1:10:2; k=-20:20];

Dimension i has chunk overlap of zero and chunk size of 100. Dimension j has an overlap of two, and the chunk size is left unspecified. Dimension k specifies neither chunk overlap nor chunk size.

AFL% dimensions(array1);

The output is:

{No} name,start,length,chunk_interval,chunk_overlap,low,high,type
{0} 'i',0,2000,100,0,4611686018427387903,-4611686018427387903,'int64'
{1} 'j',1,10,-1,2,4611686018427387903,-4611686018427387903,'int64'
{2} 'k',-20,41,-1,0,4611686018427387903,-4611686018427387903,'int64'