R: Convert Between Wide and Long Format

wide.to.long {bsts} | R Documentation

## Convert Between Wide and Long Format

### Description

Convert a multivariate time series between wide and long formats. In "wide" format there is one row per time point, with series organzied by columns. In "long" format there is one row per observation, with variables indicating the series and time point to which an observation belongs.

### Usage

      WideToLong(response, na.rm = TRUE)
      LongToWide(response, series.id, timestamps)

### Arguments

`response` | For `WideToLong` this is a matrix, with rows representing time and columns representing variables. This can be a `zoo` matrix with timestamps as an index. For `LongToWide`, `response` is a vector.
`na.rm` | If TRUE then missing values will be omitted from the returned data frame (their absence denoting missingness). Otherwise, missing values will be included as NA's.
`series.id` | A factor (or variable coercible to factor) of the same length as `response`, indicating the series to which each observation belongs.
`timestamps` | A variable of the same length as `response`, indicating the time period to which each observation belongs.

### Value

`LongToWide` returns a zoo matrix with the time series in wide format. `WideToLong` returns a 3-column data frame with columns "time", "series", and "values".

### Author(s)

Steven L. Scott steve.the.bayesian@gmail.com

### Examples

    data(gdp)
    gdp.wide <- LongToWide(gdp$GDP, gdp$Country, gdp$Time)
    gdp.long <- WideToLong(gdp.wide)

[Package bsts version 0.9.6 Index]