line_plot: Line Plots

In r2spss: Format R Output to Look Like SPSS

Line Plots

Description

Draw connected lines for variables in a data frame. The plot thereby mimics the look of SPSS graphs.

Usage

line_plot(
  data,
  variables,
  index = NULL,
  version = r2spss_options$get("version"),
  ...
)

Arguments

data	a data frame containing the variables to be plotted.
variables	a character vector specifying at least one variable to be plotted on the y-axis. In case of multiple variables, separate lines are drawn for each variable and a legend is shown.
index	a character string specifying a variable to be plotted on the x-axis, or NULL to plot the observations against their index.
version	a character string specifying whether the plot should mimic the look of recent SPSS versions ("modern") or older versions (<24; "legacy").
...	additional arguments to be passed down to geom_line.

Value

An object of class "ggplot", which produces a line plot when printed.

Author(s)

Andreas Alfons

Examples

# load data
data("Eredivisie")
# log-transform market values
Eredivisie$logMarketValue <- log(Eredivisie$MarketValue)

# aggregate log market values by position
means <- aggregate(Eredivisie[, "logMarketValue", drop = FALSE],
                   Eredivisie[, "Position", drop = FALSE],
                   FUN = mean)

# create profile plot
line_plot(means, "logMarketValue", "Position")

# easier and fancier as the plot method of ANOVA results
oneway <- ANOVA(Eredivisie, "logMarketValue",
                group = "Position")
plot(oneway)

r2spss documentation built on May 25, 2022, 5:05 p.m.