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Reference Guide
logscales.C File Reference

Detailed Description

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Draw parametric functions with log scales.

void logscales() {
TCanvas *c1 = new TCanvas("c1", "Various options on LOG scales plots",0,0,700,900);
c1->SetFillColor(30);
TPad *pad1 = new TPad("pad1","pad1",0.03,0.62,0.50,0.92,32);
TPad *pad2 = new TPad("pad2","pad2",0.51,0.62,0.98,0.92,33);
TPad *pad3 = new TPad("pad3","pad3",0.03,0.02,0.97,0.535,38);
pad1->Draw(); pad2->Draw(); pad3->Draw();
TPaveLabel *title = new TPaveLabel(0.1,0.94,0.9,0.98, "Various options on LOG scales plots");
title->SetFillColor(16);
title->SetTextFont(42);
title->Draw();
TPaveText *pave = new TPaveText(0.1,0.55,0.9,0.61);
pave->SetFillColor(42);
pave->SetTextAlign(12);
pave->SetTextFont(42);
pave->AddText("When more Log labels are requested, the overlapping labels are removed");
pave->Draw();
pad1->cd();
pad1->SetLogy();
pad1->SetGridy();
TF1 *f1 = new TF1("f1","x*sin(x)*exp(-0.1*x)+15",-10.,10.);
TF1 *f2 = new TF1("f2","(sin(x)+cos(x))**5+15",-10.,10.);
TF1 *f3 = new TF1("f3","(sin(x)/(x)-x*cos(x))+15",-10.,10.);
f2->SetLineWidth(1); f2->SetLineColor(3);
f3->SetLineWidth(1); f3->SetLineColor(4);
f1->Draw();
f2->Draw("same");
f3->Draw("same");
TPaveText *pave1 = new TPaveText(-6,2,6,6);
pave1->SetFillColor(42);
pave1->SetTextAlign(12);
pave1->SetTextFont(42);
pave1->AddText("Log scale along Y axis.");
pave1->AddText("More Log labels requested.");
pave1->Draw();
pad2->cd();
double x[10] = { 200, 300, 400, 500, 600, 650, 700, 710, 900,1000 };
double y[10] = { 200, 1000, 900, 400, 500, 250, 800, 150, 201, 220 };
TGraph *g_2 = new TGraph(10,x,y);
g_2->Draw("AL*");
g_2->SetMarkerColor(2);
pad2->SetLogy();
pad2->SetLogx();
pad2->SetGridx();
TPaveText *pave2 = new TPaveText(150,80,500,180);
pave2->SetFillColor(42);
pave2->SetTextFont(42);
pave2->SetTextAlign(12);
pave2->AddText("Log scale along X and Y axis.");
pave2->AddText("More Log labels on both.");
pave2->AddText("No exponent along Y axis.");
pave2->Draw();
pad3->cd();
pad3->SetGridx();
pad3->SetGridy();
pad3->SetLogy();
pad3->SetLogx();
TF1 *f4 = new TF1("f4a","x*sin(x+10)+25",1,21);
f4->SetLineWidth(1);
f4->Draw();
f4->SetNpx(200);
f4 = new TF1("f4b","x*cos(x+10)*sin(x+10)+25",1,21);
f4->SetLineWidth(1); f4->Draw("same");
f4->SetNpx(200);
Int_t a = 20;
for (int i=a; i>=1; i--) {
f4 = new TF1(Form("f4b_%d",i),"x*sin(x+10)*[0]/[1]+25",1,21);
f4->SetParameter(0,i);
f4->SetParameter(1,a);
f4->SetNpx(200);
f4->SetLineWidth(1); f4->SetLineColor(i+10);
f4->Draw("same");
f4 = new TF1(Form("f4c_%d",i),"x*cos(x+10)*sin(x+10)*[0]/[1]+25",1,25);
f4->SetParameter(0,i);
f4->SetParameter(1,a);
f4->SetNpx(200);
f4->SetLineWidth(1); f4->SetLineColor(i+30); f4->Draw("same");
}
TPaveText *pave3 = new TPaveText(1.2,8,9,15);
pave3->SetFillColor(42);
pave3->AddText("Log scale along X and Y axis.");
pave3->SetTextFont(42);
pave3->SetTextAlign(12);
pave3->AddText("More Log labels on both.");
pave3->AddText("The labels have no exponents (they would be 0 or 1)");
pave3->Draw();
}
int Int_t
Definition: RtypesCore.h:45
char * Form(const char *fmt,...)
Formats a string in a circular formatting buffer.
Definition: TString.cxx:2456
virtual void SetFillColor(Color_t fcolor)
Set the fill area color.
Definition: TAttFill.h:37
virtual void SetLineWidth(Width_t lwidth)
Set the line width.
Definition: TAttLine.h:43
virtual void SetLineColor(Color_t lcolor)
Set the line color.
Definition: TAttLine.h:40
virtual void SetMarkerColor(Color_t mcolor=1)
Set the marker color.
Definition: TAttMarker.h:38
virtual void SetTextAlign(Short_t align=11)
Set the text alignment.
Definition: TAttText.h:42
virtual void SetTextFont(Font_t tfont=62)
Set the text font.
Definition: TAttText.h:46
void SetMoreLogLabels(Bool_t more=kTRUE)
Set the kMoreLogLabels bit flag When this option is selected more labels are drawn when in log scale ...
Definition: TAxis.h:214
void SetNoExponent(Bool_t noExponent=kTRUE)
Set the NoExponent flag By default, an exponent of the form 10^N is used when the label value are eit...
Definition: TAxis.h:224
The Canvas class.
Definition: TCanvas.h:23
1-Dim function class
Definition: TF1.h:213
TAxis * GetYaxis() const
Get y axis of the function.
Definition: TF1.cxx:2425
virtual void SetNpx(Int_t npx=100)
Set the number of points used to draw the function.
Definition: TF1.cxx:3477
void Draw(Option_t *option="") override
Draw this function with its current attributes.
Definition: TF1.cxx:1343
virtual void SetParameter(Int_t param, Double_t value)
Definition: TF1.h:639
TAxis * GetXaxis() const
Get x axis of the function.
Definition: TF1.cxx:2414
A TGraph is an object made of two arrays X and Y with npoints each.
Definition: TGraph.h:41
void Draw(Option_t *chopt="") override
Draw this graph with its current attributes.
Definition: TGraph.cxx:808
TAxis * GetXaxis() const
Get x axis of the graph.
Definition: TGraph.cxx:1553
TAxis * GetYaxis() const
Get y axis of the graph.
Definition: TGraph.cxx:1563
The most important graphics class in the ROOT system.
Definition: TPad.h:28
void SetGridx(Int_t value=1) override
Definition: TPad.h:331
void SetLogy(Int_t value=1) override
Set Lin/Log scale for Y.
Definition: TPad.cxx:5923
void SetGridy(Int_t value=1) override
Definition: TPad.h:332
TVirtualPad * cd(Int_t subpadnumber=0) override
Set Current pad.
Definition: TPad.cxx:598
void Draw(Option_t *option="") override
Draw Pad in Current pad (re-parent pad if necessary).
Definition: TPad.cxx:1268
void SetLogx(Int_t value=1) override
Set Lin/Log scale for X.
Definition: TPad.cxx:5909
A Pave (see TPave) with a text centered in the Pave.
Definition: TPaveLabel.h:20
void Draw(Option_t *option="") override
Draw this pavelabel with its current attributes.
Definition: TPaveLabel.cxx:87
A Pave (see TPave) with text, lines or/and boxes inside.
Definition: TPaveText.h:21
virtual TText * AddText(Double_t x1, Double_t y1, const char *label)
Add a new Text line to this pavetext at given coordinates.
Definition: TPaveText.cxx:187
void Draw(Option_t *option="") override
Draw this pavetext with its current attributes.
Definition: TPaveText.cxx:238
Double_t y[n]
Definition: legend1.C:17
return c1
Definition: legend1.C:41
Double_t x[n]
Definition: legend1.C:17
TF1 * f1
Definition: legend1.C:11
TArc a
Definition: textangle.C:12
Author
Olivier Couet

Definition in file logscales.C.