If you are plotting previously made histograms you have to follow your gStyle
commands with
gROOT->ForceStyle();
Art
lijowski@cosray2.wustl.edu wrote:
> Hello Rooters,
>
> Is gStyle -> SetHistLineWidth() supposed to change a histogram line
> width in the Postscript output? The following macro reads histograms
> from the hsimple.root file and the Postscript output is the same whether
> I use gStyle -> SetHistLineWidth(1) or gStyle -> SetHistLineWidth(10).
> I have been using root 2.23/12 under SunOS5.7.
>
> Thank you and best regards,
>
> Michal Lijowski
>
> void test_hist()
>
> {
> gROOT -> Reset();
> gROOT -> SetStyle("Plain");
> gStyle -> SetHistLineWidth(1);
> // open input file
> Char_t infile[100];
> sprintf(infile, "/data1/cern/root/tutorials/hsimple.root");
> TFile *f1 = (TFile*)gROOT->GetListOfFiles()->FindObject(infile);
> if (!f1) {
> f1 = new TFile(infile);
> }
>
> cout << " hist line width " << gStyle -> GetHistLineWidth() << endl;
>
> TH1F *HH[10];
> TCanvas *CVS[10];
> gDirectory -> ls();
> gDirectory -> pwd();
> Char_t ctitle[40], cname[40];
> Char_t infile[200], outps[30];
> // create an iterator to loop through all objects(keys) in the directory
> Int_t ii = 0;
> TIter nextkey(gDirectory -> GetListOfKeys());
> TObject *obj;
> TKey *key;
> while (key = (TKey*)nextkey()) {
> key -> Print();
> obj = key -> ReadObj(); //use ReadObj, not Read
>
> if (obj->InheritsFrom("TH1") ) { //instead of obj->IsA
> HH[ii] = (TH1F *) obj;
> cout << " " << HH[ii] -> GetTitle() << endl;
> sprintf(cname, "myCVS%02d", ii);
> sprintf(ctitle, "Canvas %02d", ii);
> CVS[ii] = new TCanvas(cname, ctitle, 800, 600);
> gPad -> SetTicks();
> HH[ii] -> DrawCopy();
> CVS[ii] -> Update();
> sprintf(outps, "%s.ps", cname);
> CVS[ii] -> SaveAs(outps);
> ii++;
> }
> }
> }
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