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Usage

The following example shows how the step can be used in a recipe.

Examples

  • Example 1
  • Signature
To force the language identifier of a dataset to be all Spanish:
make_constant(ds.lang, {"value": "es"}) -> (ds.lang_es)

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Inputs & Outputs

The following are the inputs expected by the step and the outputs it produces. These are generally columns (ds.first_name), datasets (ds or ds[["first_name", "last_name"]]) or models (referenced by name e.g. "churn-clf").
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input
column
required
An arbitrary input column, used only to match its dimension (number of rows).
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output
column
required
Column filled with copies of the value specified in parameters. The data type of the output column will be the one specified by out_type.

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Configuration

The following parameters can be used to configure the behaviour of the step by including them in a json object as the last “input” to the step, i.e. step(..., {"param": "value", ...}) -> (output).

Parameters

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value
[string, number, array, array]
required
The value to fill the new column with. The data type of the output column depends on this value and the out_type parameter.
  • String
  • Number
  • String array
  • Number array
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{_}
string
A single string.
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out_type
string
required
Select types using their name.Values must be one of the following:category date number boolean url sex text list[number] list[category] list[url] list[boolean] list[date]
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