---
title: "Subsample Dataset"
method: POST
path: "/felix/data-editing/subsample"
tags: ["felix"]
---

# Subsample Dataset

`POST /felix/data-editing/subsample`

Create a subsample of the dataset using random or balanced sampling.

Creates a new dataset version with the subsampled data.

## Request body

- DataEditingSubsampleRequest — Request to subsample a dataset
  - `dataset_name` string, required — Dataset name
  - `version` string, nullable — Dataset version (latest if omitted)
  - `method` 'random' | 'balanced' | 'stratified' — Subsampling method
  - `n` integer, required — Target number of samples
  - `label_column` string, nullable — Column for balanced/stratified sampling
  - `seed` integer, nullable — Random seed for reproducibility
  - `new_dataset_name` string, nullable — Name for the new subsampled dataset (auto-generated if omitted)

## Response `200`

Successful Response

- DataEditingSubsampleResponse — Response after subsampling
  - `success` boolean, required
  - `dataset_name` string, required
  - `dataset_version` string, required
  - `new_dataset_name` string, required
  - `new_dataset_version` string, required
  - `original_rows` integer, required
  - `new_rows` integer, required
  - `method` string, required
  - `message` string, required

## Other responses

- `422` — Validation Error

---

[API](https://skmtc.net/pioneer/apis/brain-api.md) · [All operations](https://skmtc.net/pioneer/apis/brain-api/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/pioneer/brain-api/versions/31dfe831e079/schema)