ManageVariables: GUI: Variable Manager

In USGS-R/RSurvey: Geographic Information System Application

Description

A graphical user interface (GUI) for managing variables in the data table.

Usage

ManageVariables(cols, vars, query, changelog, parent = NULL)

Arguments

cols	list. See ‘Value’ section
vars	list. See ‘Value’ section
query	character. See ‘Value’ section
changelog	data.frame. See ‘Value’ section
parent	tkwin. GUI parent window

Details

This GUI lets you: (1) specify the names and format of variables; (2) add new variables based on user defined functions, see EditFunction; (3) display data in a spreadsheet, see EditData; and (4) remove and (or) reorder variables in the data table.

Value

Returns an object of class list with components cols and vars. The cols object is a list whose length is equal to the current number of data variables. Each component in cols is linked to a specific variable, and contains the following components:

name	variable name
format	conversion specification format (optional)
id	unique identifier that is created from name.
fun	expression evaluated when computing the variables vector of values.
index	variable's component index number in the data.raw data table, see ImportText. Only required for variables directly linked to data columns in data.raw.
class	data class of the vector object.
summary	summary of the variable's descriptive statistics (see summary).
comments	user comments

The vars object is a list with components:

x, y, z, sort.on	the index number of the corresponding state variable in cols. These indexes are updated to reflect the removal and (or) reordering of variables in cols.
query	if required, variable names are updated.
changelog	if required, names in the variable component are updated.

Author(s)

J.C. Fisher, U.S. Geological Survey, Idaho Water Science Center

Examples

## Not run: 
  Data(replace.all = obj)
  ManageVariables(obj$cols, obj$vars, obj$query, obj$changelog)

## End(Not run)

USGS-R/RSurvey documentation built on May 9, 2019, 6:10 p.m.