xps (version 1.32.0)

root.hist2D: ROOT 2D-Histogram

Description

Creates a ROOT 2D-histogram for a ROOT tree.

Usage

root.hist2D(x, treename1 = character(0), treename2 = character(0),logbase = "log2", option = "COLZ", canvasname = "Histogram2D", save.as = "", w = 540, h = 540)

Arguments

x

object of class DataTreeSet or ExprTreeSet.

treename1

name of first tree, must be present in rootfile of object x.

treename2

name of second tree, must be present in rootfile of object x.

logbase

usually “log2”, or “0”, determines if leaf data should be converted to log.

option

ROOT hist TH2 option, usually one of “SCAT”, “COLZ”, “BOX”, “SURF2”, “SURF3”.

canvasname

name of ROOT canvas

save.as

graphics type for saving canvas, one of “ps”, “eps”, “pdf”, “jpg”, “gif”, “png”, “tiff”

w

the width of the canvas in pixels.

h

the height of the canvas in pixels.

Details

Creates a ROOT 2D-histogram for trees treename1 and treename2 present in rootfile.

By selecting menu “File->Save->canvasname.xxx” you can save the figure as e.g. *gif, *.jpg, *.pdf, *.ps or even as C++ macro.

Alternatively, you can save the plot by setting save.as. However, this will close the canvas immediately after opening it.

See Also

root.hist1D, root.hist3D

Examples

## Not run: 
# ## first, load ROOT scheme file and ROOT data file
# scheme.test3 <- root.scheme(paste(path.package("xps"),"schemes/SchemeTest3.root",sep="/"))
# data.test3 <- root.data(scheme.test3, paste(path.package("xps"),"rootdata/DataTest3_cel.root",sep="/"))
# 
# root.hist2D(data.test3, "TestA1.cel", "TestB1.cel", option="COLZ")
# ## End(Not run)