Logo ROOT   6.08/07
Reference Guide
gaxis3.C File Reference

Detailed Description

View in nbviewer Open in SWAN Example illustrating how to modify individual labels of a TGaxis.

The method ChangeLabel allows to do that.

The first parameter of this method is the label number to be modified. If this number is negative labels are numbered from the last one. The other parameters are (in order):

pict1_gaxis3.C.png
void gaxis3() {
c1 = new TCanvas("c1","Examples of Gaxis",10,10,800,400);
c1->Range(-6,-0.1,6,0.1);
TGaxis *axis = new TGaxis(-5.5,0.,5.5,0.,0.0,100,510,"");
axis->SetName("axis");
axis->SetTitle("Axis Title");
axis->SetTitleSize(0.05);
axis->SetTitleColor(kBlue);
axis->SetTitleFont(42);
// Change the 1st label color to red.
axis->ChangeLabel(1,-1,-1,-1,2);
// Erase the 3rd label
axis->ChangeLabel(3,-1,0.);
// 5th label is drawn with an angle of 30 degrees
axis->ChangeLabel(5,30.,-1,0);
// Change the text of the 6th label.
axis->ChangeLabel(6,-1,-1,-1,3,-1,"6th label");
// Change the text of the 2nd label to the end.
axis->ChangeLabel(-2,-1,-1,-1,3,-1,"2nd to last label");
axis->Draw();
}
Author
Olivier Couet

Definition in file gaxis3.C.