Adds functions

`get_group`

,`get_YiGmin1`

, and`get_Yi1`

as utility functions for manipulating data. This is especially useful for settings with staggered treatment adoption.Add functions

`get_lagYi`

and`get_first_difference`

as more utility functions for working with panel data.Add function

`get_Yit`

which recovers outcomes in period t for all units in a panel.Restore default of

`makeBalancedPanel`

to return a data.frame rather than a data.table. New function argument`return_data.table`

allows for returning a data.table if this is the desired functionality from the user.Fixes documentation NOTE in

`id2rownum`

- only execute examples for
`subsample`

and`blockBootSample`

if`plm`

package is available (thanks Achim Zeileis)

- faster version of
`panel2cs2`

(thanks Kyle Butts)

added Rcpp multiplier_bootstrap function

added TorF function, a vectorized version of isTRUE

allow for additional arguments in combineDfs function

changed package maintainer contact information

added source_all function

- added getElementList function

removed dependency on plm and formula.tools

add function blockBootSample for block bootstrapping with panel data

add option in makeDist to force the values of the distribution function be between 0 and 1

Update rhs.vars to fix bug related to formulas like y~x+I(x^2)

Update toformula to allow for no right hand side variables

Added function to take distribution functions (ecdf objects) and turn them into step functions for the quantiles.

Improved code for working with formulas

- Added function for obtaining a subsample of a panel data set

- Added function addCovToFormla which adds covariate(s) to a particular formula

- Removed dependency on qte package