Fit histo from file

Good evening,

I have to make a fit on a histogram using the Landau distribution. The data are contained in a two-column file (in the first there are measured voltages, in the second there are events). Can Root read this data, make the histogram and fitting? How?

To read the file you can do something similar to the examples proposed here:
https://root-forum.cern.ch/t/how-to-combine-between-two-histograms-in-one-histogram-alignment/34303/9

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