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

# Data Scaling (Z-Score, MinMax, Robust)

> Scales features to improve model performance. Z-score for normal distributions, MinMax for bounded ranges (0-1), Robust for data with outliers. Essential preprocessing for distance-based algorithms. [Tier: ENTERPRISE, Credits: 10]



## OpenAPI

````yaml api-specs/ml.json post /quantlib/ml/preprocessing/scale
openapi: 3.1.0
info:
  title: FinceptQuantLib API - ML
  description: >-
    Machine Learning and Credit Risk module endpoints for FinceptQuantLib API.
    Pro Tier access required (5 credits per request). Covers credit scoring,
    model validation, regression models, clustering, anomaly detection, feature
    engineering, and preprocessing.
  version: 3.0.0
  contact:
    name: Fincept API Support
    url: https://fincept.in
servers:
  - url: https://api.fincept.in
    description: Fincept API Production Server
security:
  - APIKeyHeader: []
tags:
  - name: quantlib-ml
    description: Machine Learning and Credit Risk Analytics
    x-displayName: ML
paths:
  /quantlib/ml/preprocessing/scale:
    post:
      tags:
        - quantlib-ml
      summary: Data Scaling (Z-Score, MinMax, Robust)
      description: >-
        Scales features to improve model performance. Z-score for normal
        distributions, MinMax for bounded ranges (0-1), Robust for data with
        outliers. Essential preprocessing for distance-based algorithms. [Tier:
        ENTERPRISE, Credits: 10]
      operationId: scale_data
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              required:
                - X
              properties:
                X:
                  type: array
                  description: Feature matrix to scale
                  items:
                    type: array
                    items:
                      type: number
                  example:
                    - - 100
                      - 0.5
                    - - 200
                      - 1.3
                    - - 150
                      - 0.9
                method:
                  type: string
                  description: Scaling method
                  enum:
                    - zscore
                    - minmax
                    - robust
                  default: zscore
                  example: zscore
      responses:
        '200':
          description: Scaled data
          content:
            application/json:
              schema:
                type: object
                properties:
                  success:
                    type: boolean
                    example: true
                  data:
                    type: object
                    properties:
                      scaled:
                        type: array
                        items:
                          type: array
                          items:
                            type: number
                        description: Scaled feature matrix
                        example:
                          - - -1.22
                            - -1
                          - - 1.22
                            - 1
                          - - 0
                            - 0
                      method:
                        type: string
                        example: zscore
        '401':
          $ref: '#/components/responses/UnauthorizedError'
        '402':
          $ref: '#/components/responses/InsufficientCreditsError'
        '422':
          $ref: '#/components/responses/ValidationError'
components:
  responses:
    UnauthorizedError:
      description: Authentication information is missing or invalid
      content:
        application/json:
          schema:
            type: object
            properties:
              detail:
                type: string
                example: Invalid API key
    InsufficientCreditsError:
      description: Insufficient credits for this operation
      content:
        application/json:
          schema:
            type: object
            properties:
              detail:
                type: string
                example: Insufficient credits. This endpoint requires 5 credits.
    ValidationError:
      description: Request validation error
      content:
        application/json:
          schema:
            type: object
            properties:
              detail:
                type: array
                items:
                  type: object
                  properties:
                    loc:
                      type: array
                      items:
                        type: string
                    msg:
                      type: string
                    type:
                      type: string
  securitySchemes:
    APIKeyHeader:
      type: apiKey
      in: header
      name: X-API-Key
      description: >-
        API key for authentication. Get your key at
        https://api.fincept.in/auth/register

````