STdiag.measure: Hand measures on a structure time diagram
In STdiag: Functions to Plot a Structure-Time Diagram

Description Usage Arguments Details Value Author(s) See Also Examples

This function allows to extract the coordinates of a point, a line or a region of a structure time diagram.

STdiag.measure(stdiag,
    type=c("point","line"),
    region=FALSE,
    range=3.3,
    pch=21,
    lwd=3,
    col.line=1,
    col='white',
    fill=1,
    cex=1.2)

`stdiag`	The plot returned by `STdiag`.
`type`	Object to identify, either "point" or "line".
`region`	TRUE / FALSE, extract a region of the plot.
`range`	Factor of the mean distance between two coordinates to define the region to extract.
`pch,lwd,col.line,col,fill,cex`	Graphical parameters of the points and line superimposed on the diagram.

This function allows to extract the coordinates of a point, a line or a region of a structure time diagram. If region=TRUE, the points to return are determined by the range of the region. The parameter range defines this range. If the wanted point coordinates are x and y and the original data are data, the region is defined by x in x - range * mean(diff(unique(data$x))) and x + range * mean(diff(unique(data$x))) and y in y - range * mean(diff(unique(data$y))) and y + range * mean(diff(unique(data$y))).

If region is FALSE, returns a data frame with the x, y and z coordinates of the points selected and the index of the corresponding line in the original table, and (if type="l") the slope of the line plotted.

If region is TRUE, returns a LIST where