# Array Random Sampler

Randomly select specified number of elements from an array with support for different sampling methods

> Canonical page: https://elysiatools.com/en/tools/array-random-sampler

- **Category:** Development

- **Keywords:** array, random, sample, select, pick, choose, sampling, shuffle

## Overview

The Array Random Sampler is a versatile utility designed to extract a specific number of elements from any dataset using various statistical sampling methods, ensuring precise and reproducible results for your data processing tasks.

## Inputs

- **Array Elements** (textarea): Enter array elements separated by delimiter... apple, banana, orange, grape, mango, peach, kiwi, pineapple
- **Input Delimiter** (select)
- **Custom Delimiter** (text): Enter custom delimiter
- **Sample Size** (number): Number of elements to sample (e.g., 3)
- **Sampling Method** (select)
- **Random Seed** (number): Seed for reproducible results (optional)
- **Allow Duplicates (Sampling with Replacement)** (checkbox)
- **Preserve Original Order** (checkbox)
- **Output Format** (select)

## When to use

- When you need to select a representative subset from a large list of items for testing or analysis.
- When you require reproducible random selections for experiments by utilizing a specific random seed.
- When you need to perform specialized sampling, such as systematic or simple random selection, on raw data inputs.

## How it works

- Paste your data into the input field and select the appropriate delimiter that matches your data format.
- Define the number of elements you wish to extract and choose your preferred sampling method.
- Configure optional settings like random seeds for reproducibility or replacement options to allow duplicate selections.
- Select your desired output format, such as JSON, CSV, or a formatted table, to generate the final sampled list.

## Use cases

- Generating random test data for software development and QA automation.
- Selecting a random subset of participants from a database for survey or research purposes.
- Creating randomized variations of content lists for A/B testing marketing campaigns.

## Frequently asked questions

### Can I ensure the same random result every time?

Yes, by entering a specific number in the 'Random Seed' field, you can generate the same sequence of random selections repeatedly.

### What is the difference between simple and systematic sampling?

Simple random sampling selects items purely by chance, while systematic sampling selects items at regular intervals from the original list.

### Does this tool support custom delimiters?

Yes, select 'Custom' from the delimiter dropdown and enter your specific character in the 'Custom Delimiter' field.

### Can I pick the same item more than once?

Yes, enable the 'Allow Duplicates' option to perform sampling with replacement, which allows the same element to be selected multiple times.

### What output formats are available?

You can export your results as a formatted table, JSON, CSV, visual representation, statistics summary, or a simple text list.

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