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splitstackshape

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R functions to split concatenated data, conveniently stack columns of data.frames, and conveniently reshape data.frames.

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# splitstackshape

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R functions to split concatenated data, stack columns of your datasets, and convert your data into different shapes.

## Core Functions

* `cSplit`: A core function that collects the functionality of several of the  `concat.split` family of functions.
* `concat.split`: A set of functions to split strings where data have been concatenated into a single value, as is common when getting data collected with tools like Google Forms. (`cSplit_l` to return a `list`; and `cSplit_e` to return an "expanded" view of the input data.)
* `Stacked`: A function to create a list of `stack`ed sets of variables. Similar to `melt` from "reshape2", but doesn't put everything into one very long `data.frame`.
* `Reshape`: A function to allow base R's `reshape` function to work with "unbalanced" datasets.
* `stratified`: A function to take random row samples by groups, similar to `sample_n` and `sample_frac` from "dplyr".

## Utilities

* `getanID`: A function for creating a secondary ID when duplicated "id" variables are present.
* `expandRows`: "Expands" the rows of a dataset.
* `listCol_l` and `listCol_w`: Unlists (long) or flattens (wide) a column in a `data.frame` or a `data.table` stored as a `list`. Neither is vectorized.

## Install

The package [is on CRAN](https://CRAN.R-project.org/package=splitstackshape). You can install it using:

```r
install.packages("splitstackshape")
```

To install the V2 beta version, use:

```r
devtools::install_github("mrdwab/splitstackshape", ref = "v2.0")
```

To install the V1 development version, use:

```r
devtools::install_github("mrdwab/splitstackshape", ref = "v1_development")
```

Current CRAN version: 1.4.8

splitstackshape

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