Hi Harufumi,
It was not possible to zoom with the mouse a THStack object.
I have implemented this possibility (for 1-d and 2-d cases)
in the current version in CVS.
Rene Brun
Harufumi Tsuchiya wrote:
>
> Hello rooters,
>
> I am using THStack class to draw some histograms in the same pad
> and I found I could not zoom in/out along y-axis but could do
> along x-axis. Following macro is a part of my macro.
> Something wrong ?
>
> :
> :
> TCanvas *c = new TCanvas("c", "", 10, 10, 550, 750);
> c->Divide(2, 3);
> THStack *hstack_laxis[6];
> Char_t hstackname[20];
> for ( Int_t i = 0; i < 6; i++ ) {
> sprintf(hstackname, "hstack_laxis %d", i);
> hstack_laxis[i] = new THStack(hstackname, "");
> c->cd(i+1);
> gPad->SetLogx();
> hlaxis[0][i]->Sumw2(); hlaxis[1][i]->Sumw2();
> hlaxis[0][i]->Scale(1.0/nentries[0]); hlaxis[1][i]->Scale(1.0/nentries[1]);
> hlaxis[0][i]->SetLineColor(2); hlaxis[1][i]->SetLineColor(4);
> hstack_laxis[i]->Add(hlaxis[0][i]); hstack_laxis[i]->Add(hlaxis[1][i]);
> hstack_laxis[i]->Draw("nostack a ehist");
> gPad->Modified();
> }
> :
> :
> (hlaxis[2][6] are decleared and filled before this routine.)
>
> I also checked hstack.C in $ROOTSYS/tutrials as well as my macro.
> But, I could not get the zooming action along y-axis.
>
> What method can I use for zoomig action when use THStack class.
>
> I use ROOT v 3.03/04 on IRIX 6.5 and g++ 2.95.2.
>
> Harufumi Tsuchiya.
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