A question about tuples

Recording, Visualizing and Persisting Data
1

Hi:

I now record my experimental data using a tuple, and then I send this data as a csv
file format for output. I have defined some coordinate points in the table, so that I only need to collect the energy deposition of the particles and then fill this energy deposition to the corresponding coordinate points according to HitID.

My table is in the following form：

24	25	24	1.02392
24	25	25	0.0164816
25	24	24	0.0175839
25	24	25	1.0497
24	21	23	0.0309379
27	27	24	0.000790499
27	29	24	0.0247787
24	25	25	1.00889
24	27	26	0.00189608
24	25	18	0.0249534
24	26	24	0.00170278
25	25	24	1.00535
25	25	25	0.0352888
23	24	24	0.0272186
24	24	24	0.000246737
24	24	25	1.00883
24	25	25	0.0261769
24	28	25	0.00313601
25	26	25	0.0016772
24	24	22	0.0271868
26	27	23	0.0274653
25	25	24	1.01264
25	24	24	1.0401
25	26	26	0.0271868
30	23	20	0.00200663
26	27	21	0.00126701
26	26	22	0.0212785
28	23	23	0.000919787
29	23	23	0.00171486
26	25	24	0.0274653
24	25	25	1.01264
24	24	24	1.01264
24	24	25	0.002059
25	24	25	0.0254063
27	25	26	0.000712982
29	26	26	0.00253239
27	24	27	0.0239415

But now I have a question, let’s say a csv table is filled at the end of an event, and when the next time starts, if a coordinate point already has energy deposition data, then if a new energy deposition value is collected again at this point in a new event, will this new energy deposition overwrite the original value or will it be added to the original value.

Thank you for your answers

2

With a tuple, there’s a separate row for each entry. You can see this in what you’ve quoted above; there are multiple entries for “24 24 25”, for instance. If you want to be able to see the distribution of dose from each event in each little volume, your tuple is good for that.

If you only want to accumulate dose in your volume of little cubes over a whole run, you might want to do that with a 3D histogram (in ROOT, it would be “TH3D”; I’m not familiar enough with G4analysis to know what it’s called there).
Then, in each event, you can accumulate the dose per volume, and and the end of the run the histogram gets written out.