ee.ImageCollection.randomColumn

Adds a column of deterministic pseudorandom numbers to a collection. The outputs are double-precision floating point numbers. When using the 'uniform' distribution (default), outputs are in the range of [0, 1). Using the 'normal' distribution, outputs have μ=0, σ=1, but have no explicit limits.

Usage	Returns
ImageCollection.randomColumn(columnName, seed, distribution, rowKeys)	FeatureCollection

Argument	Type	Details
this: collection	FeatureCollection	The input collection to which to add a random column.
columnName	String, default: "random"	The name of the column to add.
seed	Long, default: 0	A seed used when generating the random numbers.
distribution	String, default: "uniform"	The distribution type of random numbers to produce; one of 'uniform' or 'normal'.
rowKeys	List, optional	A list of properties that should uniquely and repeatably identify an element of the collection, used to generate the random number. Defaults to [system:index].