# hutils v1.5.0

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## Miscellaneous R Functions and Aliases

Provides utility functions for, and drawing on, the 'data.table' package. The package also collates useful miscellaneous functions extending base R not available elsewhere. The name is a portmanteau of 'utils' and the author.

# hutils

Miscellaneous R functions and aliases

My name is Hugh and this is a package of functions I often put in R/utils.s. Hence, hutils.

### Scope

The package attempts to provide lightweight, fast, and stable functions for common operations.

By lightweight, I mean in terms of dependencies: we import package:data.table and package:fastmatch which do require compilation, but in C. Since so many operations handle data frames, data.table seemed worthwhile -- and besides its compile time is not too onerous. Otherwise, all dependencies do not require compilation. (I also try to minimize the cardinality of package imports, but it's mostly the compile time I'm focused on.)

By fast, I mean essentially as fast as possible without using compilation.

By stable, I mean that unit tests should not change unless the major version also changes. To make this completely transparent, tests include the version of their introduction and are guaranteed to not be modified (not even in the sense of adding extra, independent tests) while the major version is 1. Tests that do not include the version in their filename may be modified from version to version (though this will be avoided).

## Functions in hutils

 Name Description aliases Aliases coalesce Find first non-missing element auc AUC any_grepl Does the pattern appear anywhere? average_bearing Average of bearings all_same_sign Determine whether a vector is all of the same sign drop_constant_cols Drop constant columns %ein% Exists and (not) in duplicated_rows Return duplicated rows of data.table %notchin% Negation of in (character) drop_empty_cols Drop empty columns implies #' Logical implies isAttached Is a package attached? dev_copy2a4 Copy device to an A4 PDF %pin% Partial in dir2 List many files provide.dir Provide directory replace_pattern_in Replace string pattern in text file RQ Shorthand for requireNamespace generate_LaTeX_manual Generate LaTeX manual of installed package set_cols_first Put columns first or last samp Safer sampler hutils-package hutils package %notin% Negation of in if_else Vectorized if find_pattern_in Find string pattern in (text) file select_grep Select names matching a pattern swap Swap assignment drop_col Drop column or columns isTrueFalse Logical assertions longest_affix Longest common prefix/suffix mutate_other Group infrequent entries into 'Other category' drop_colr Drop columns whose names match a pattern select_which Select columns satisfying a condition ngrep Anti-grep selector Fast selection of data.table columns mean_na Proportion of values that are NA. haversine_distance Distance between two points on the Earth provide.file Provide a file mutate_ntile Add a column of ntiles to a data table weighted_ntile Weighted (ranked) quantiles weighted_quantile Weighted quantile unique-keys Unique keys report_error Report errors and warnings weight2rows Expand a weighted data frame to an equivalent unweighted ahull Maximum area given x and y coordinates Switch Vectorized switch Mode Statistical mode No Results!