| as.symbols | Construction of Lists of Symbols | 
| cases | Distinguish between Cases Specified by Logical Conditions | 
| collect | Collect Objects | 
| dimrename | Change dimnames, rownames, or colnames | 
| Foreach | Loop over Variables in a Data Frame or Environment | 
| nin | Negative Match | 
| relabel | Change labels of factors or labelled objects | 
| rename | Change Names of a Named Object | 
| reorder.array | Reorder an Array or Matrix | 
| retain | Retain Objects in an Environment | 
| sample-methods | Take a Sample from a Data Frame | 
| Sapply | A Dimension Preserving Variant of "sapply" and "lapply" | 
| sort-methods | Convenience Methods to Sort Data Frames and Data Sets | 
| Substitute | Substitutions in Language Objects | 
| trimws | Trim Leading and Trailing Whitespaces | 
| unzip | Extract Files from Zip Files | 
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