get_expression_pca: Get Expression Pca

In gtexr: Query the GTEx Portal API

Get Expression Pca

Description

Find gene expression PCA data.

• Returns gene expression PCA (principal component analysis) in tissues.

• Results may be filtered by tissue, sample, or dataset.

By default, the service queries the latest GTEx release.

GTEx Portal API documentation

Usage

get_expression_pca(
  tissueSiteDetailIds,
  datasetId = "gtex_v8",
  sampleId = NULL,
  page = 0,
  itemsPerPage = getOption("gtexr.itemsPerPage"),
  .verbose = getOption("gtexr.verbose"),
  .return_raw = FALSE
)

Arguments

tissueSiteDetailIds	Character vector of IDs for tissues of interest. Can be GTEx specific IDs (e.g. "Whole_Blood"; use get_tissue_site_detail() to see valid values) or Ontology IDs.
datasetId	String. Unique identifier of a dataset. Usually includes a data source and data release. Options: "gtex_v8", "gtex_snrnaseq_pilot".
sampleId	String. ⁠^GTEX-[A-Z0-9]{5}-[0-9]{4}-SM-[A-Z0-9]{5}$⁠
page	Integer (default = 0).
itemsPerPage	Integer (default = 250). Set globally to maximum value 100000 with options(list(gtexr.itemsPerPage = 100000)).
.verbose	Logical. If TRUE (default), print paging information. Set to FALSE globally with options(list(gtexr.verbose = FALSE)).
.return_raw	Logical. If TRUE, return the raw API JSON response. Default = FALSE

Value

A tibble. Or a list if .return_raw = TRUE.

See Also

Other Expression Data Endpoints: get_clustered_median_exon_expression(), get_clustered_median_gene_expression(), get_clustered_median_junction_expression(), get_clustered_median_transcript_expression(), get_gene_expression(), get_median_exon_expression(), get_median_gene_expression(), get_median_junction_expression(), get_median_transcript_expression(), get_single_nucleus_gex(), get_single_nucleus_gex_summary(), get_top_expressed_genes()

Examples

## Not run: 
get_expression_pca(tissueSiteDetailIds = c(
  "Adipose_Subcutaneous",
  "Whole_Blood"
))

get_expression_pca(
  tissueSiteDetailIds = "Adipose_Subcutaneous",
  sampleId = "GTEX-1117F-0226-SM-5GZZ7"
)

## End(Not run)

gtexr documentation built on June 8, 2025, 10:26 a.m.