download_ctd_chem {CTDquerier} | R Documentation

## Function to download checmicals available in CTDbase

### Description

This function download the "Chemical vocabulary" file (`CTD_chemicals.tsv.gz`) from `http://ctdbase.org/downloads`.

### Usage

    download_ctd_chem(verbose = FALSE, ask = TRUE)

### Arguments

`verbose` | (default `FALSE`) If set to `TRUE` is shows relevant information of each step.
`ask` | (default `TRUE`) If `TRUE` it asks the the persistent location must be used.

### Details

The field included in the file (`CTD_chemicals.tsv.gz`) are:

1. ChemicalName

2. ChemicalID (MeSH identifier)

3. CasRN (CAS Registry Number, if available)

4. Definition

5. ParentIDs (identifiers of the parent terms; '|'-delimited list),

6. TreeNumbers (identifiers of the chemical's nodes; '|'-delimited list),

7. ParentTreeNumbers (identifiers of the parent nodes; '|'-delimited list),

8. Synonyms ('|'-delimited list)

9. DrugBankIDs ('|'-delimited list)

### Value

Passed name into `filename` argument if it could be download `1` otherwise.

### Examples

    download_ctd_chem()
    file.exists( "CTD_chemicals.tsv.gz" )

[Package CTDquerier version 2.2.0 Index]