Dear all,
To open a phase space .root file , I am able to open it in TBrowser .But I am confused that what could be the meaning of vertex position in y cm and Position in y cm interprets ?
If anybody can elaborate the doubt. It would be really helpful.
PFA image
Thank You
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ROOT Version: ROOT 6.32.02
Platform: Ubuntu 13.2.0-23ubuntu4 13.2.0
Compiler: c++
Hi Dipanuta,
But I am confused that what could be the meaning of vertex position in y cm and Position in y cm interprets ?
The question of how to interpret your data is best discussed with your colleagues or supervisor.
From your screenshot I can see that the TBrowser opens fine and the histogram is successfully rendered. If you do encounter a ROOT-specific issue, please let us know and we are happy to help.
Best,
Lukas
Thank you @lbreitwi for the suggestion.
I am having a problem in converting a 2D plot to 3D plot.
Please tell how to convert this 2D plot to 3D plot in TBrowser ? What changes are required to obtain the following kind of plots ?
Thank You
How are you getting the 2D plot? A good start is to show the code you are using to get the 2D plot. Anyway, if you already know how to do a 2D plot, the 3D plot is straightforward, just use the appropriate constructor and Fill method (expand the “Public Member Functions inherited from TH3” to see the ways to Fill it):
Then check the Drawing options for 3D histos; start here and search down the page for more about 3D options:
According to the plot you post it looks like you have a 2D histogram. The top image is produced with a command like h→Draw(“COLZ"); . I guess that’s what you call the 2D plot. To get the 3D representation below you’ll need to change the drawing option to SURF1Z
Thank you for the clarification. I mistakenly considered the first image shared in this conversation to be a 2D plot.
I completely don’t know how to get the 2D plot from TH1F , 1D plot.
TH1F *htemp__1 = new TH1F(“htemp__1“, “Position_X_cm_“, 100,- 88, 88) ;
What exactly input should be done to get a 2D and then a 3D graph ?
Thank You
Something like that:
TH2F *htemp__2 = new TH2F(“htemp__2“, ““, 100,- 88, 88, 100, -88, 88);
Thank you,
I tried to change TH1F to TH2F in the code and was able to get a 2D plot .
But I am obtaining a blank XY 2D plot , Why it is not showing the same curve points as in TH1F ?
And is there any way to add .csv file which contains x and y data points in the Editor of root , so that it can plot the 2D graph.
It looks like your TH2F was not filled. Can you show the code you wrote to create and fill the TH2F ? (the screen dump you posted is not clear enough, it would be nice to have a piece of code).
For a TH2 you need to used this version of SetBinContent
@couet Note that this looks like the automatically generated file (i.e., menu “Save->File->Canvas_1.C”), so maybe you should have used the “proper” method. 
@Dipanuta_Behera it seems all your entries go into the “underflow” bins. In the source code which creates the histogram, try:
TH2F *h = new TH2F("h", "h", 100, 0, 0, 100, 0, 0); // automatic binning
When I save a TH2 (hpxpy from hsimple.root) in a .C file the histogram content is not set by individual calls to SetBinContent but via a loop on a vector containing the bins’ contents. That’s why I am suspecting the macro was edited after being created.
@Wile_E_Coyote Yes you are right le macro was generated with 6.32. 
@Dipanuta_Behera This macro was obtained by saving a canvas in a .C file. But how did you create the canvas initially ?
Yes you all are right, I just edit the .C file in a new .C file for 2D plot ? I think this was a wrong way to do .
Should I first create a new macro file then run it in root ?
But now I have data points just need to plot it in 2D format in root.
thank you
Yes you should create a macro reading your data and create a 2D hitogram using them. Wihotut an example it is difficult to help you further.
