xtsum {xtsum}

Calculate summary statistics for panel data

Description

This function computes summary statistics for panel data, including overall statistics, between-group statistics, and within-group statistics.

Usage

xtsum(
  data,
  variables = NULL,
  id = NULL,
  t = NULL,
  na.rm = FALSE,
  return.data.frame = FALSE,
  dec = 3
)

Arguments

data

A data.frame or pdata.frame object representing panel data.

variables

(Optional) Vector of variable names for which to calculate statistics. If not provided, all numeric variables in the data will be used.

id

(Optional) Name of the individual identifier variable.

t

(Optional) Name of the time identifier variable.

na.rm

Logical indicating whether to remove NAs when calculating statistics.

return.data.frame

If the return object should be a dataframe

dec

Number of significant digits to report

Value

A table summarizing statistics for each variable, including Mean, SD, Min, and Max, broken down into Overall, Between, and Within dimensions.

Examples

# Using a data.frame and specifying variables, id, it, na.rm, dec
data("nlswork", package = "sampleSelection")
xtsum(nlswork, "hours", id = "idcode", t = "year", na.rm = TRUE, dec = 6)

# Using pdata.frame object without specifying a variable
data("Gasoline", package = "plm")
Gas <- pdata.frame(Gasoline, index = c("country", "year"), drop.index = TRUE)
xtsum(Gas)


# Using regular data.frame with id and t specified
data("Crime", package = "plm")
xtsum(Crime, variables = c("crmrte", "prbarr"), id = "county", t = "year")

# Specifying variables to include in the summary
xtsum(Gas, variables = c("lincomep", "lgaspcar"))