Drawing multiple TGraph from two txt file

[chanchal]

Dear Expert,

I want to add two TGraph from two txt file in a TMultiGraph and draw it.
But I am facing below error:

This is script attached that I am using read_graph_txt_MC_data.C (2.1 KB)

mean_variation.txt (667 Bytes)

mean_variation_new_single_gauss.txt (662 Bytes)

Can you please suggest ?

Regards
Chanchal

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[Wile_E_Coyote]

mg.Add(&graph1);

[chanchal]

It’s working now. Thanks a lot for your reply.

[chanchal]

Hii @Wile_E_Coyote,

I want to set the range of x axis from 0 to 2.5 of a this TMultiGraph. I have tried this using mg.GetXaxis()->SetRangeUser(0, 2.5); but its taking range according with data points below.

Can you please suggest to solve this?

Regards
Chanchal

[Wile_E_Coyote]

Try: mg.GetHistogram()->GetXaxis()->SetRangeUser(0., 2.5);

[chanchal]

Hii @Wile_E_Coyote,

Thanks for your reply.
This is giving the same as earlier.

Here the script and txt file that I am using (in case you prefer): read_graph_txt_MC_data.C (2.5 KB)
mean_variation_new_single_gauss.txt (662 Bytes)
mean_variation.txt (667 Bytes)

Regards
Chanchal

[Wile_E_Coyote]

It seems you want to “widen” the axis, so try:
mg.GetHistogram()->GetXaxis()->SetLimits(0., 2.5);

[chanchal]

It’s working now. Thanks a lot.