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ee.ImageCollection.randomColumn
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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]. |
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Last updated 2025-04-01 UTC.
[null,null,["Last updated 2025-04-01 UTC."],[[["\u003cp\u003eAdds a new column of random numbers to an existing FeatureCollection.\u003c/p\u003e\n"],["\u003cp\u003eUsers can specify the column name, seed for reproducibility, and distribution type (uniform or normal).\u003c/p\u003e\n"],["\u003cp\u003eThe 'uniform' distribution generates numbers between 0 (inclusive) and 1 (exclusive), while the 'normal' distribution generates numbers with a mean of 0 and standard deviation of 1.\u003c/p\u003e\n"],["\u003cp\u003eThe output is a new FeatureCollection with the added random column.\u003c/p\u003e\n"]]],[],null,["# ee.ImageCollection.randomColumn\n\nAdds 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.\n\n\u003cbr /\u003e\n\n| Usage | Returns |\n|--------------------------------------------------------------------------------------------|-------------------|\n| ImageCollection.randomColumn`(`*columnName* `, `*seed* `, `*distribution* `, `*rowKeys*`)` | FeatureCollection |\n\n| Argument | Type | Details |\n|--------------------|----------------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------|\n| this: `collection` | FeatureCollection | The input collection to which to add a random column. |\n| `columnName` | String, default: \"random\" | The name of the column to add. |\n| `seed` | Long, default: 0 | A seed used when generating the random numbers. |\n| `distribution` | String, default: \"uniform\" | The distribution type of random numbers to produce; one of 'uniform' or 'normal'. |\n| `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\\]. |"]]