root.hist2D: ROOT 2D-Histogram

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

Description

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

Usage

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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.

Note

Always select menu item “Quit ROOT” from menu “File” to close the ROOT canvas, otherwise you are in the CINT C/C++ interpreter from ROOT. To exit CINT, you need to type “.q”.

Author(s)

Christian Stratowa

See Also

root.hist1D, root.hist3D

Examples

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## 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)

xps documentation built on May 2, 2018, 2:33 a.m.