# Various R Programming Tools for Data Manipulation

## Documentation for package ‘gdata’ version 2.18.0

- DESCRIPTION file.
- User guides, package vignettes and other documentation.
- Package NEWS.

## Help Pages

A B C D E F G H I K L M N O P R S T U W X misc

gdata-package | Various R programming tools for data manipulation

## -- A --

aggregate.table | Defunct Functions in Package 'gdata'
ans | Value of Last Evaluated Expression
Args | Describe Function Arguments
as.levelsMap | Mapping levels
as.listLevelsMap | Mapping levels
as.object_sizes | Report the Space Allocated for Objects

## -- B --

bindData | Bind two data frames into a multivariate data frame

## -- C --

c.levelsMap | Mapping levels
c.listLevelsMap | Mapping levels
c.object_sizes | Report the Space Allocated for Objects
case | Map elements of a vector according to the provided 'cases'
cbindX | Column-bind objects with different number of rows
centerText | Center Text Strings
combine | Combine R Objects With a Column Labeling the Source
ConvertMedUnits | Convert medical measurements between International Standard (SI) and US 'Conventional' Units.

## -- D --

drop.levels | Drop unused factor levels
duplicated2 | Determine Duplicate Elements

## -- E --

elem | Display Information about Elements in a Given Object
env | Describe All Loaded Environments

## -- F --

first | Return first or last element of an object
first<- | Return first or last element of an object
format.object_sizes | Report the Space Allocated for Objects
frameApply | Subset analysis on data frames

## -- G --

gdata | Various R programming tools for data manipulation
getDateTimeParts | Get date/time parts from date and time objects
getDay | Get date/time parts from date and time objects
getDay.Date | Get date/time parts from date and time objects
getDay.default | Get date/time parts from date and time objects
getDay.POSIXct | Get date/time parts from date and time objects
getDay.POSIXlt | Get date/time parts from date and time objects
getHour | Get date/time parts from date and time objects
getHour.default | Get date/time parts from date and time objects
getMin | Get date/time parts from date and time objects
getMin.default | Get date/time parts from date and time objects
getMonth | Get date/time parts from date and time objects
getMonth.Date | Get date/time parts from date and time objects
getMonth.default | Get date/time parts from date and time objects
getMonth.POSIXct | Get date/time parts from date and time objects
getMonth.POSIXlt | Get date/time parts from date and time objects
getSec | Get date/time parts from date and time objects
getSec.default | Get date/time parts from date and time objects
getYear | Get date/time parts from date and time objects
getYear.Date | Get date/time parts from date and time objects
getYear.default | Get date/time parts from date and time objects
getYear.POSIXct | Get date/time parts from date and time objects
getYear.POSIXlt | Get date/time parts from date and time objects

## -- H --

humanReadable | Print Byte Size in Human Readable Format

## -- I --

installXLSXsupport | Install perl modules needed for read.xls to support Excel 2007+ XLSX format
interleave | Interleave Rows of Data Frames or Matrices
is.levelsMap | Mapping levels
is.listLevelsMap | Mapping levels
is.object_sizes | Report the Space Allocated for Objects
is.what | Run Multiple is.* Tests on a Given Object
isUnknown | Change unknown values to NA and vice versa
isUnknown.data.frame | Change unknown values to NA and vice versa
isUnknown.default | Change unknown values to NA and vice versa
isUnknown.list | Change unknown values to NA and vice versa
isUnknown.matrix | Change unknown values to NA and vice versa
isUnknown.POSIXlt | Change unknown values to NA and vice versa

## -- K --

keep | Remove All Objects, Except Those Specified

## -- L --

last | Return first or last element of an object
last<- | Return first or last element of an object
left | Return the leftmost or rightmost columns of a matrix or dataframe
ll | Describe Objects or Elements
lowerTriangle | Extract or replace the upper/lower triangular portion of a matrix
lowerTriangle<- | Extract or replace the upper/lower triangular portion of a matrix
ls.funs | List function objects

## -- M --

mapLevels | Mapping levels
mapLevels.character | Mapping levels
mapLevels.data.frame | Mapping levels
mapLevels.default | Mapping levels
mapLevels.factor | Mapping levels
mapLevels.list | Mapping levels
mapLevels<- | Mapping levels
mapLevels<-.character | Mapping levels
mapLevels<-.data.frame | Mapping levels
mapLevels<-.default | Mapping levels
mapLevels<-.factor | Mapping levels
mapLevels<-.list | Mapping levels
matchcols | Select columns names matching certain critera
MedUnits | Table of conversions between Intertional Standard (SI) and US 'Conventional' Units for common medical measurements.
mv | Rename an Object

## -- N --

NAToUnknown | Change unknown values to NA and vice versa
NAToUnknown.data.frame | Change unknown values to NA and vice versa
NAToUnknown.default | Change unknown values to NA and vice versa
NAToUnknown.factor | Change unknown values to NA and vice versa
NAToUnknown.list | Change unknown values to NA and vice versa
nobs | Compute the Number of Non-missing Observations
nobs.data.frame | Compute the Number of Non-missing Observations
nobs.default | Compute the Number of Non-missing Observations
nobs.lm | Compute the Number of Non-missing Observations
nPairs | Number of variable pairs

## -- O --

object.size | Report the Space Allocated for Objects

## -- P --

print.levelsMap | Mapping levels
print.listLevelsMap | Mapping levels
print.object_sizes | Report the Space Allocated for Objects

## -- R --

read.xls | Read Excel files
remove.vars | Remove or rename variables in a dataframe
rename.vars | Remove or rename variables in a dataframe
reorder.factor | Reorder the Levels of a Factor
resample | Consistent Random Samples and Permutations
right | Return the leftmost or rightmost columns of a matrix or dataframe

## -- S --

sheetCount | Count or list sheet names in Excel spreadsheet files.
sheetNames | Count or list sheet names in Excel spreadsheet files.
sort.levelsMap | Mapping levels
startsWith | Determine if a character string "starts with" with the specified characters.

## -- T --

trim | Remove leading and trailing spaces from character strings
trimSum | Trim a vector such that the last/first value represents the sum of trimmed values

## -- U --

unique.levelsMap | Mapping levels
unknownToNA | Change unknown values to NA and vice versa
unknownToNA.data.frame | Change unknown values to NA and vice versa
unknownToNA.default | Change unknown values to NA and vice versa
unknownToNA.factor | Change unknown values to NA and vice versa
unknownToNA.list | Change unknown values to NA and vice versa
unmatrix | Convert a matrix into a vector, with appropriate names
update.list | Update the elements of a list
upperTriangle | Extract or replace the upper/lower triangular portion of a matrix
upperTriangle<- | Extract or replace the upper/lower triangular portion of a matrix

## -- W --

wideByFactor | Create multivariate data by a given factor
write.fwf | Write object in fixed width format

## -- X --

xls2csv | Read Excel files
xls2sep | Read Excel files
xls2tab | Read Excel files
xls2tsv | Read Excel files
xlsFormats | Check which file formats are supported by read.xls

## -- misc --

"[.levelsMap" | Mapping levels
"[.listLevelsMap" | Mapping levels
.checkLevelsMap | Mapping levels
.checkListLevelsMap | Mapping levels