laterhist {Laterality}

laterhist: this function plots an histogram of the different type of grasp (Left, right, bimanual...) for each kind of activity.

Description

Counts the number of occurences of each type of grasp and plot the corresponding histogram for each task performed.

Usage

  laterhist(data, catch = "Food", hand = "Hand", 
  col = 1:nlevels(data[[hand]]), ylim = NULL, 
  ylab = "Number of grips", 
  main = "Type of grips regarding to the performed task", 
  legend.text = FALSE, beside = TRUE, legendlocation = TRUE, 
  cex = 1, pt.cex = 2, pch = 15)

Arguments

data

the object (data.frame) containing your data with at least the qualitative variables concerning the hand used (hand) and the activity performed (catch).

catch

The name/header of the column concerning the activity carried out (by default "Food"), if you made individuals catching different objects (ob1, ob2, ob3, ob4) and named the variale "ObjectCatched", write catch = "ObjectCatched".

hand

The name/header of the column concerning the hand used (by default "Hand").

col

A list of color for the bars of the histogram. By default it will automatically find the number of colors you need but it's using the 8 colors of the default palette of R. If you need more don't forget to select another palette or to name the color you want to add.

ylim

The minimum and maximum value of the y axis. For example ylim = c(0,500). By default (ylim = NULL) the values are automatically selected.

ylab

A title for the y axis.

main

The main title of the graph.

legend.text

If legend.text = TRUE, the legend will be automatically placed on the graph. If legend.text = FALSE, no legend will appear except if legendlocation = TRUE.

beside

If FALSE, the columns of height are portrayed as stacked bars, and if TRUE the columns are portrayed as juxtaposed bars.

legendlocation

If TRUE you will have to click where you want to place the legend after the plot is done.

cex

A numeric giving the size of the legend characters.

pt.cex

A numeric giving the size of the legend points.

pch

This can either be a single character or an integer code for one of a set of graphics symbols. This will be applied to the legend. (By default pch = 15 which is square).

Author(s)

Borel A., Pouydebat E., Reghem E. <[e-mail]>

References

Meguerditchian A., Calcutt S.E., Lonsdorf E.V., Ross S.R. and Hopkins W.D. (2010) Brief communication: Captive Gorillas are right-handed for bimanual feeding. American Journal of Physical Anthropology 141:638-645.

See Also

barplot

Examples

  ## With arguments corresponding to the default ones:
  data(laterdata)
  str(laterdata)
  Data<-laterdata
  laterhist(Data, catch ="Food", hand="Hand", 
  legend.text = TRUE, legendlocation = FALSE)
  ## or
  laterhist(Data, legend.text = TRUE, legendlocation = FALSE)
  
  ## With arguments different from the default ones:
  data(lateradata)
  str(lateradata)
  Data<-lateradata
  laterhist(Data, catch ="Act", hand="HandPref", legend.text = TRUE, legendlocation = FALSE)