![]() These can also be specified by the user, using the usual xlim, ylim, xlab, ylab and main arguments. ![]() The argument rr must be set to TRUE.įinally, the function will automatically determines the X and Y axis limits and specifies default labels for X and Y axes and the main title. The sample correlation between the Delta scores can also be printed, in the upper-left corner of the plot. The defaulkt value isĬ(1,3), meaning that empty circles three times larger than usual are drawn. The argument dif.draw defines both the type of pointĪnd the size of the point to draw over the existing Delta points (for items flagged as DIF only). Items flagged as DIF are also clearly identified on the plot. The major axis is always drawn by a solid line, the bounds by dashed lines. The major axis can be withdrawn by setting the argument axis.draw to FALSE, and the bounds can be displayed by setting the argument thr.draw to TRUE. The major axis is drawn byĭefault, while the upper and lower bounds are not. Two types of axes can be draw: the major axis and the upper and lower bounds for DIF detection. In this way, multiple items located at a single Delta point can easily be located on the plot. The default value is 17, that is, a full black If several items are located on exactly the same Delta point, the pch.multĪrgument defines the type of point to display bover the existing point. It takes the default value 2, which means that items areĭisplayed with empty triangles. The type of point is defined by the cex argument. All other argumpents are rather standard and for optimization of the graphical display. The input data x must be a list of class deltaPlot, so typically the output of the deltaPlot function. Basically the Delta plot displays the items in a scatter plot by means of their Delta points, and the major axis is drawn. The results of the Delta plot method can be graphically displayed using this function. The second component is either the file path (without final "/" symbol) or "default" (default), and the third component is the file extension, either "pdf" (default) or "jpeg". The first component is the name of the output file, Logical: should the plot be saved in an external figure? (default is FALSE).Ĭharacter: a vector of three components. If NULL, the X and Y axis limits are computed from the range of Delta scores, the X and Y axis labels are "Reference group" and "Focal group" respectively, and no main title is produced. TRUE, it is printed in upper-left corner of the plot.Įither the usual plot arguments xlim, ylim, xlab, ylab and main, or NULL (default value for all arguments). Logical: should the sample correlation of Delta scores be printed? (default is FALSE). Meaning that empty circles of three time the usual size are drawn around the Delta points of items the usual pch argument) and the secondĬomponent determlines the point size (i.e. The firstĬomponent of dif.draw is the type of point (i.e. Numeric: a vector of two integer values to specify how the DIF items should be displayed. TRUE, they will be drawn as dashed lines. Logical: should the upper and lower bounds for DIF detection be drawn? (default is FALSE). Logical: should the major axis be drawn? (default is TRUE). Default value is 17, that is, full black traingles are drawn onto existing Delta plots wherein Integer: the typoe of point to be used for superposing onto Delta points that correspond to several Default value is 2, that is, Delta points are Integer: the usual point character type for point display. Save.options = c("plot", "default", "pdf"))Īn object of class "deltaPlot", typically the output of the deltaPlot function. Usage diagPlot(x, pch = 2, pch.mult = 17, axis.draw = TRUE, thr.draw = FALSE,ĭif.draw = c(1,3), rr = FALSE, xlim = NULL, ylim = NULL, xlab = NULL, This command plots the output of the deltaPlot function as a diagonal plot of Deltas points. Plot of the Deltas points from the Delta Plot method Description
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |