mt_plot_add_rect function

Add rectangles to trajectory plot.

mt_plot_add_rect adds one or several rectangles to a mousetrap plot. These buttons usually correspond to the borders of the buttons in the mouse-tracking experiment. It is specifically designed so that the arguments from the mousetrap_response plugin in OpenSesame can be used.

mt_plot_add_rect(rect, color = "black", fill = NA, ...)

Arguments

• rect: a data.frame or matrix with one row per box. For each rectangle, the x-position (x), y-position (y), width (w), and height (h) needs to be provided. If columns are not labeled, the order x, y, w, h is assumed.
• color: argument passed on to geom_rect . Specifies the color of the border of the rectangles.
• fill: argument passed on to geom_rect . Specifies the color of the interior of the rectangles. If NA (the default), rectangles are unfilled.
• ...: additional arguments passed on to geom_rect .

Details

mt_plot_add_rect internally uses geom_rect of the ggplot2 package for plotting.

Examples

# Load ggplot2
library(ggplot2)

# Import, flip, and time-normalize raw trajectories
mt_example <- mt_import_mousetrap(mt_example_raw)
mt_example <- mt_remap_symmetric(mt_example,remap_xpos="no")
mt_example <- mt_time_normalize(mt_example)

# Create rectangles matrix
rectangles <- matrix(
  # (The matrix is n x 4, and contains
  # all relevant data for every button,
  # (i.e. x, y, width and height values)
  # in separate rows)
  c(
   -840, 525,  350, -170,
    840, 525, -350, -170
  ),
  ncol=4, byrow=TRUE)

# Plot all time-normalized trajectories
# varying the color depending on the condition
# and add rectangles
mt_plot(mt_example,
  use="trajectories",
  x="xpos", y="ypos", color="Condition"
) + mt_plot_add_rect(rect=rectangles)

See Also

mt_plot for plotting trajectory data.

Author(s)

Pascal J. Kieslich

Felix Henninger