psdr (version 1.0.1)

GetSubsetOfWindowsTwoLevels: Select only windows (dataframes) where a two specified columns must match specified values

Description

Looks at all the windows (dataframes) in a list of homogeneous windows. And only selects the windows where the column values for two columns matches the specified values.

Usage

GetSubsetOfWindowsTwoLevels(
  list.of.windows,
  level1.column.name,
  level2.column.name,
  level1.categories,
  level2.categories
)

Arguments

list.of.windows

A list of windows (dataframes) and each window can only have a single unique value for the two specified columns.

level1.column.name

A String that specifies the column name to use for the first level. This column should only contain one unique value within each window.

level2.column.name

A String that specifies the column name to use for the second level. This column should only contain one unique value within each window.

level1.categories

A vector that specifies the possible labels in the level1 column.

level2.categories

A vector that specifies the possible labels in the level2 column.

Value

List containing only selected windows

Details

Takes a List of windows (dataframes) where each window is a homogeneous window, which means in each window, there is only one unique value in the specified column. This function looks through the homogeneous windows in the List, selects the windows that have specified column value(s) in the first specified column, then from the windows selected based on the first column, windows are further selected to have specified column value(s) in the second specified column. Puts these windows into a new List and outputs the new List of windows. Uses the GetSubsetOfWindows() function.

Examples

# NOT RUN {
#Example using a dataframe with 5 homogeneous windows.

#Windows are homogeneous if looking at col.two and col.three values.
window.name.column <- c(10, 10, 10, 20, 20, 20, 30, 30, 30, 30, 40, 40, 50, 50, 50, 50)
col.two <- c("a", "a", "a", "a", "a", "a", "a", "a", "a", "a", "b", "b", "a", "a", "a", "a")
col.three <- c(1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 1, 1, 3, 3, 3, 3)

multi.window.data <- data.frame(window.name.column, col.two, col.three)

list.of.homogeneous.windows <- GetHomogeneousWindows(multi.window.data,
"window.name.column", c("col.two", "col.three"))

result <- GetSubsetOfWindowsTwoLevels(list.of.homogeneous.windows, "col.two", "col.three",
c("a"), c("1", "2"))

#Should contain windows 10, 20, 30 because col.two is "a" and col.three can be "1" or "2"
result

# }