Search OpenNeuro Datasets

Searches the OpenNeuro database for datasets. When a text query is provided, uses the search endpoint if available. Otherwise lists datasets with optional filtering.

Usage

on_search(
  query = NULL,
  modality = NULL,
  limit = 50,
  all = FALSE,
  client = NULL
)

Arguments

query

Text query to search for. Note: The OpenNeuro search API may have limited availability. If search returns no results, consider using query = NULL with modality filter instead.

modality

Filter by modality (e.g., "MRI", "EEG", "MEG", "iEEG", "PET"). Case-insensitive matching is attempted.

limit

Maximum number of results to return per page (default 50).

all

If TRUE, paginate through all matching results. If FALSE (default), return only the first page.

client

An openneuro_client object. If NULL, creates a default client.

Value

A tibble with columns:

id

Dataset identifier (e.g., "ds000001")

name

Dataset title

created

Timestamp when dataset was created (POSIXct)

public

Whether the dataset is publicly accessible (logical)

modalities

List of modalities in the dataset

n_subjects

Number of subjects in the dataset

tasks

List of tasks in the dataset

Returns an empty tibble with the same column structure if no matches found.

See also

on_dataset() for detailed metadata on a single dataset

Examples

if (FALSE) { # \dontrun{
# List datasets (most reliable)
results <- on_search(limit = 10)

# Filter by modality
mri_datasets <- on_search(modality = "MRI", limit = 25)
eeg_datasets <- on_search(modality = "EEG", limit = 25)

# Text search (may have limited availability)
results <- on_search("visual cortex", limit = 10)

# Get all datasets (may be slow)
all_datasets <- on_search(all = TRUE)
} # }