Creation of cells and plot energy deposition in 3D histogram

ROOT
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Dear Experts in my ROOT file I have 1D Histogram of energy distribution, X y Z position of hits and Cell ID of detector. I have calorimeter box with dimensions of 10cm x 10cm x 20cm. I need to divide this Box Volume into 1mm^3 size of cells and want to see energy deposition in each of these cells and finally plot 3D histogram. Kindly Guide me in this regard.

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A TH3 should be the right data format.

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That I know but don’t know How to divide into cells and then fill each cell for energy deposition

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The “cells” are the bins. At the histogram creation time you specify the binning, that will define the cells.

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