---
title: "numeric-transform"
slug: "numeric-transform-parser"
updated: 2022-07-27T17:28:51Z
published: 2022-07-27T17:28:51Z
canonical: "code.tag.bio/numeric-transform-parser"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://code.tag.bio/llms.txt
> Use this file to discover all available pages before exploring further.

# numeric-transform

The *numeric-transform* **parser** will load data from a column in a source data table and map values to other values before producing a numeric **variable** within a **collection**.

It inherits attributes and behaviors from its parent: **parser** - *numeric*.

The *numeric-transform* **parser** contains a set of attributes for converting numeric values from a source column into new values before loading into a *numeric* **variable** within a **collection**.

## Attribute - operator

The *operator* attribute is required.

```
{
  "parser_type": "numeric-transform",
  "column": "cccc",
  
  // The value of the operator attribute is a numeric operator
  // which can either be applied directly to a value,
  // or used in conjunction with a constant.
  //
  // Options without constant include:
  // "log" - log base 10
  // "ln"
  // "log2"
  // "boxcox10"
  // "log_pseduo" - adds a pseudocount of 1 to all input values
  // "ln_pseudo" - adds a pseudocount of 1 to all input values
  // "log2_pseudo" - adds a pseudocount of 1 to all input values
  // "sin"
  // "cos"
  // "tan"
  // "asin"
  // "acos"
  // "atan"
  // "abs"
  // "floor"
  // "ceiling"
  // "round"
  // "sqrt"
  // "exp"
  // 
  // Options which require constant include:
  // "+"
  // "-"
  // "*"
  // "/"
  // "%"
  // "^"
  // "log+" - adds logs of both value and constant
  // "ln+" - adds logs of both value and constant
  // "log2+" - adds logs of both value and constant
  // "boxcox10+" - adds logs of both value and constant
  // "log-" - subtracts log of constant from log of value
  // "ln-" - subtracts log of constant from log of value
  // "log2-" - subtracts log of constant from log of value
  // "boxcox10-" - subtracts log of constant from log of value
  //
  "operator": "ln",
  
  "collection": "collection_name",
  "collection": "variable_name"
}
```

## Attribute - constant

The *constant* attribute is optional.

```
{
  "parser_type": "numeric-transform",
  "column": "cccc",
  "operator": "*",
  
  // The constant attribute is used in conjunction
  // with operator to transform values.
  //
  "constant": 10
  
  "collection": "collection_name",
  "collection": "variable_name"
}
```