Rotate axis labels

[Progressive]

Hi,

is there an option to rotate the axis labels (for e.g. about 90 degrees so they will be aligned vertically) ?

Thank you!

[ferhue]

(Duplicated) Check:

Rotating the labels

Looking into TAxis methods I came to the conclusion that should make the labels lay on their sides (rotate by 90 degrees), since the default is “h”. However, the only visible effect is this: Warning in TAxis::Sort: Cannot sort. No labels Is there a way to rotate the labels on the horisontal axis of the histogram? I think there is, b/c I’ve seen some rotated at by an angle that was not even 90 degrees … Test macro: (getting hold of the palette is another thing that does not work) [co…

Time-axis and vertical labels + alignement histogram points

Dear ROOT-experts. I am struggling with a couple of issues when using the time-axis defined through this_axis.SetTimeDisplay(1) this_axis.SetTimeFormat("#splitline{%y-%m-%d}{%H:%M:%S}%F1970-01-01 00:00:00") then the x-axis of the histogram is filled using an array of TTimeStamp objects. Question 1: I have tried rotating the axis-labels using this_axis.LabelsOption("v") but keep getting: Is there some restriction with the labelsoption when using time-axis? It works when I use a “normal” …

[Progressive]

Thank you!

So h->LabelsOption(“v”); is what I am looking for. But it does not work, either via i[/i] nor via i[/i].
Is there something that has to be set previously/additionally ?

[ferhue]

It depends on the type of labels you have (alphanumeric or not). Please post a small code reproducer of your problem.

[Progressive]

It is, finally just numerical:

(…) TCanvas* c=new TCanvas("c","Compare",1400,1000); gStyle->SetOptStat(0); gStyle->SetPadGridX(kTRUE); gStyle->SetPadGridY(kTRUE); TFile *Outputfile=new TFile(outputfile_root, "RECREATE"); c->Divide(2,1); TH2D *U_against_SN_before = new TH2D("U_against_SN_before", "U_{bias}", bins, down, up, bins, down, up); U_against_SN_before->Fill(SN[n], Ubias[n]); c->cd(1); U_against_SN_before->GetXaxis()->SetTitle("SN"); U_against_SN_before->GetYaxis()->SetTitle("U_{bias}"); U_against_SN_before->SetMarkerStyle(8); U_against_SN_before->SetMarkerSize(0.5); U_against_SN_before->LabelsOption("v", "X"); U_against_SN_before->Draw("");
(…)

SN is something like 0912009913
and Ubias 353.638682453

It is not that important, I’m just wondering (but I guess for the future it could help at some point to know how to do it).
Thank you in advance!

[ferhue]

You cannot rotate the labels if they are numeric.

See:

Rotating the labels

Looking into TAxis methods I came to the conclusion that should make the labels lay on their sides (rotate by 90 degrees), since the default is “h”. However, the only visible effect is this: Warning in TAxis::Sort: Cannot sort. No labels Is there a way to rotate the labels on the horisontal axis of the histogram? I think there is, b/c I’ve seen some rotated at by an angle that was not even 90 degrees … Test macro: (getting hold of the palette is another thing that does not work) [co…

The workaround is to define char labels, check:
Alphanumeric TGraph labels - #6 by couet

[Progressive]

Ok, thank you!

Just forgot to answer in the past…

[ferhue]

You are welcome. By the way, the second link of my previous post should read: Alphanumeric TGraph labels

[couet]

note also the new fonctionality : https://root.cern/doc/master/classTGaxis.html#GA10a