Logo ROOT  
Reference Guide
Legendre.py File Reference

Namespaces

namespace  Legendre
 

Detailed Description

View in nbviewer Open in SWAN
Example of first few Legendre Polynomials.

Inspired by work of Lorenzo Moneta.

import ROOT
ROOT.gSystem.Load("libMathMore")
Canvas = ROOT.TCanvas("DistCanvas", "Legendre polynomials example", 10, 10, 750, 600)
Canvas.SetGrid()
leg = ROOT.TLegend(0.5, 0.7, 0.4, 0.89)
L = []
for nu in range(5):
f = ROOT.TF1("L_0", "ROOT::Math::legendre([0],x)", -1, 1)
f.SetParameters(nu, 0.0)
f.SetLineStyle(1)
f.SetLineWidth(2)
f.SetLineColor(nu+1)
L.append(f)
L[0].SetMaximum(1)
L[0].SetMinimum(-1)
L[0].SetTitle("Legendre polynomials")
for idx, val in enumerate(L):
leg.AddEntry(val, " L_{}(x)".format(idx), "l")
if idx == 0:
val.Draw()
else:
val.Draw("same")
leg.Draw("same")
Option_t Option_t TPoint TPoint const char GetTextMagnitude GetFillStyle GetLineColor GetLineWidth GetMarkerStyle GetTextAlign GetTextColor GetTextSize void char Point_t Rectangle_t WindowAttributes_t Float_t Float_t Float_t Int_t Int_t UInt_t UInt_t Rectangle_t Int_t Int_t Window_t TString Int_t GCValues_t GetPrimarySelectionOwner GetDisplay GetScreen GetColormap GetNativeEvent const char const char dpyName wid window const char font_name cursor keysym reg const char only_if_exist regb h Point_t winding char text const char depth char const char Int_t count const char ColorStruct_t color const char Pixmap_t Pixmap_t PictureAttributes_t attr const char char ret_data h unsigned char height h Atom_t Int_t ULong_t ULong_t unsigned char prop_list Atom_t Atom_t Atom_t Time_t format
Author
Alberto Ferro, Massimiliano Galli

Definition in file Legendre.py.