1 /**************************************************************************
2 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
7 * Permission to use, copy, modify and distribute this software and its *
8 * documentation strictly for non-commercial purposes is hereby granted *
9 * without fee, provided that the above copyright notice appears in all *
10 * copies and that both the copyright notice and this permission notice *
11 * appear in the supporting documentation. The authors make no claims *
12 * about the suitability of this software for any purpose. It is *
13 * provided "as is" without express or implied warranty. *
14 **************************************************************************/
17 ///////////////////////////////////////////////////////////////////////////////
19 // Calibration base class for a single ROC //
20 // Contains one float value per pad //
21 // mapping of the pads taken form AliTPCROC //
23 ///////////////////////////////////////////////////////////////////////////////
37 #include "AliTPCCalROC.h"
38 #include "AliMathBase.h"
40 #include "TRandom3.h" // only needed by the AliTPCCalROCTest() method
42 ClassImp(AliTPCCalROC)
45 //_____________________________________________________________________________
46 AliTPCCalROC::AliTPCCalROC()
55 // Default constructor
60 //_____________________________________________________________________________
61 AliTPCCalROC::AliTPCCalROC(UInt_t sector)
70 // Constructor that initializes a given sector
73 fNChannels = AliTPCROC::Instance()->GetNChannels(fSector);
74 fNRows = AliTPCROC::Instance()->GetNRows(fSector);
75 fkIndexes = AliTPCROC::Instance()->GetRowIndexes(fSector);
76 fData = new Float_t[fNChannels];
77 for (UInt_t idata = 0; idata< fNChannels; idata++) fData[idata] = 0.;
80 //_____________________________________________________________________________
81 AliTPCCalROC::AliTPCCalROC(const AliTPCCalROC &c)
90 // AliTPCCalROC copy constructor
93 fNChannels = AliTPCROC::Instance()->GetNChannels(fSector);
94 fNRows = AliTPCROC::Instance()->GetNRows(fSector);
95 fkIndexes = AliTPCROC::Instance()->GetRowIndexes(fSector);
97 fData = new Float_t[fNChannels];
98 for (UInt_t idata = 0; idata< fNChannels; idata++) fData[idata] = c.fData[idata];
100 //____________________________________________________________________________
101 AliTPCCalROC & AliTPCCalROC::operator =(const AliTPCCalROC & param)
104 // assignment operator - dummy
106 if (this == ¶m) return (*this);
107 fSector = param.fSector;
108 fNChannels = AliTPCROC::Instance()->GetNChannels(fSector);
109 fNRows = AliTPCROC::Instance()->GetNRows(fSector);
110 fkIndexes = AliTPCROC::Instance()->GetRowIndexes(fSector);
112 fData = new Float_t[fNChannels];
113 for (UInt_t idata = 0; idata< fNChannels; idata++) fData[idata] = param.fData[idata];
118 //_____________________________________________________________________________
119 AliTPCCalROC::~AliTPCCalROC()
122 // AliTPCCalROC destructor
132 void AliTPCCalROC::Streamer(TBuffer &R__b)
135 // Stream an object of class AliTPCCalROC.
137 if (R__b.IsReading()) {
138 AliTPCCalROC::Class()->ReadBuffer(R__b, this);
139 fkIndexes = AliTPCROC::Instance()->GetRowIndexes(fSector);
141 AliTPCCalROC::Class()->WriteBuffer(R__b,this);
148 void AliTPCCalROC::Add(Float_t c1){
150 // add c1 to each channel of the ROC
152 for (UInt_t idata = 0; idata< fNChannels; idata++) fData[idata]+=c1;
156 void AliTPCCalROC::Multiply(Float_t c1){
158 // multiply each channel of the ROC with c1
160 for (UInt_t idata = 0; idata< fNChannels; idata++) fData[idata]*=c1;
164 void AliTPCCalROC::Add(const AliTPCCalROC * roc, Double_t c1){
166 // multiply AliTPCCalROC roc by c1 and add each channel to the coresponing channel in the ROC
169 for (UInt_t idata = 0; idata< fNChannels; idata++){
170 fData[idata]+=roc->fData[idata]*c1;
175 void AliTPCCalROC::Multiply(const AliTPCCalROC* roc) {
177 // multiply each channel of the ROC with the coresponding channel of 'roc'
180 for (UInt_t idata = 0; idata< fNChannels; idata++){
181 fData[idata]*=roc->fData[idata];
186 void AliTPCCalROC::Divide(const AliTPCCalROC* roc) {
188 // divide each channel of the ROC by the coresponding channel of 'roc'
191 Float_t kEpsilon=0.00000000000000001;
192 for (UInt_t idata = 0; idata< fNChannels; idata++){
193 if (TMath::Abs(roc->fData[idata])>kEpsilon)
194 fData[idata]/=roc->fData[idata];
198 Double_t AliTPCCalROC::GetMean(AliTPCCalROC *const outlierROC) const {
200 // returns the mean value of the ROC
201 // pads with value != 0 in outlierROC are not used for the calculation
202 // return 0 if no data is accepted by the outlier cuts
204 if (!outlierROC) return TMath::Mean(fNChannels, fData);
205 Double_t *ddata = new Double_t[fNChannels];
207 for (UInt_t i=0;i<fNChannels;i++) {
208 if (!(outlierROC->GetValue(i))) {
209 ddata[nPoints]= fData[i];
215 mean = TMath::Mean(nPoints, ddata);
220 Double_t AliTPCCalROC::GetMedian(AliTPCCalROC *const outlierROC) const {
222 // returns the median value of the ROC
223 // pads with value != 0 in outlierROC are not used for the calculation
224 // return 0 if no data is accepted by the outlier cuts
226 if (!outlierROC) return TMath::Median(fNChannels, fData);
227 Double_t *ddata = new Double_t[fNChannels];
229 for (UInt_t i=0;i<fNChannels;i++) {
230 if (!(outlierROC->GetValue(i))) {
231 ddata[nPoints]= fData[i];
237 median = TMath::Median(nPoints, ddata);
242 Double_t AliTPCCalROC::GetRMS(AliTPCCalROC *const outlierROC) const {
244 // returns the RMS value of the ROC
245 // pads with value != 0 in outlierROC are not used for the calculation
246 // return 0 if no data is accepted by the outlier cuts
248 if (!outlierROC) return TMath::RMS(fNChannels, fData);
249 Double_t *ddata = new Double_t[fNChannels];
251 for (UInt_t i=0;i<fNChannels;i++) {
252 if (!(outlierROC->GetValue(i))) {
253 ddata[nPoints]= fData[i];
259 rms = TMath::RMS(nPoints, ddata);
264 Double_t AliTPCCalROC::GetLTM(Double_t *const sigma, Double_t fraction, AliTPCCalROC *const outlierROC){
266 // returns the LTM and sigma
267 // pads with value != 0 in outlierROC are not used for the calculation
268 // return 0 if no data is accepted by the outlier cuts
270 Double_t *ddata = new Double_t[fNChannels];
272 for (UInt_t i=0;i<fNChannels;i++) {
273 if (!outlierROC || !(outlierROC->GetValue(i))) {
274 ddata[nPoints]= fData[i];
279 Double_t ltm =0, lsigma=0;
281 Int_t hh = TMath::Min(TMath::Nint(fraction *nPoints), Int_t(nPoints));
282 AliMathBase::EvaluateUni(nPoints,ddata, ltm, lsigma, hh);
283 if (sigma) *sigma=lsigma;
290 TH1F * AliTPCCalROC::MakeHisto1D(Float_t min, Float_t max,Int_t type){
293 // type -1 = user defined range
294 // 0 = nsigma cut nsigma=min
295 // 1 = delta cut around median delta=min
300 Float_t mean = GetMean();
301 Float_t sigma = GetRMS();
302 Float_t nsigma = TMath::Abs(min);
303 min = mean-nsigma*sigma;
304 max = mean+nsigma*sigma;
308 Float_t mean = GetMedian();
315 // LTM mean +- nsigma
318 Float_t mean = GetLTM(&sigma,max);
324 TString name=Form("%s ROC 1D%d",GetTitle(),fSector);
325 TH1F * his = new TH1F(name.Data(),name.Data(),100, min,max);
326 for (UInt_t irow=0; irow<fNRows; irow++){
327 UInt_t npads = (Int_t)GetNPads(irow);
328 for (UInt_t ipad=0; ipad<npads; ipad++){
329 his->Fill(GetValue(irow,ipad));
337 TH2F * AliTPCCalROC::MakeHisto2D(Float_t min, Float_t max,Int_t type){
340 // type -1 = user defined range
341 // 0 = nsigma cut nsigma=min
342 // 1 = delta cut around median delta=min
347 Float_t mean = GetMean();
348 Float_t sigma = GetRMS();
349 Float_t nsigma = TMath::Abs(min);
350 min = mean-nsigma*sigma;
351 max = mean+nsigma*sigma;
355 Float_t mean = GetMedian();
362 Float_t mean = GetLTM(&sigma,max);
370 for (UInt_t irow=0; irow<fNRows; irow++){
371 if (GetNPads(irow)>maxPad) maxPad = GetNPads(irow);
374 TString name=Form("%s ROC%d",GetTitle(),fSector);
375 TH2F * his = new TH2F(name.Data(),name.Data(),fNRows+10,-5, fNRows+5, maxPad+10, -(Int_t(maxPad/2))-5, maxPad/2+5);
376 for (UInt_t irow=0; irow<fNRows; irow++){
377 UInt_t npads = (Int_t)GetNPads(irow);
378 for (UInt_t ipad=0; ipad<npads; ipad++){
379 his->Fill(irow+0.5,Int_t(ipad)-Int_t(npads/2)+0.5,GetValue(irow,ipad));
382 his->SetMaximum(max);
383 his->SetMinimum(min);
387 TH2F * AliTPCCalROC::MakeHistoOutliers(Float_t delta, Float_t fraction, Int_t type){
389 // Make Histogram with outliers
390 // mode = 0 - sigma cut used
391 // mode = 1 - absolute cut used
392 // fraction - fraction of values used to define sigma
393 // delta - in mode 0 - nsigma cut
394 // mode 1 - delta cut
397 Float_t mean = GetLTM(&sigma,fraction);
398 if (type==0) delta*=sigma;
400 for (UInt_t irow=0; irow<fNRows; irow++){
401 if (GetNPads(irow)>maxPad) maxPad = GetNPads(irow);
404 TString name=Form("%s ROC Outliers%d",GetTitle(),fSector);
405 TH2F * his = new TH2F(name.Data(),name.Data(),fNRows+10,-5, fNRows+5, maxPad+10, -(Int_t(maxPad/2))-5, maxPad/2+5);
406 for (UInt_t irow=0; irow<fNRows; irow++){
407 UInt_t npads = (Int_t)GetNPads(irow);
408 for (UInt_t ipad=0; ipad<npads; ipad++){
409 if (TMath::Abs(GetValue(irow,ipad)-mean)>delta)
410 his->Fill(irow+0.5,Int_t(ipad)-Int_t(npads/2)+0.5,1);
418 void AliTPCCalROC::Draw(Option_t* opt){
420 // create histogram with values and draw it
425 if (option.Contains("1D")){
438 void AliTPCCalROC::Test() {
440 // example function to show functionality and test AliTPCCalROC
443 Float_t kEpsilon=0.00001;
445 // create CalROC with defined values
446 AliTPCCalROC roc0(0);
447 for (UInt_t irow = 0; irow <roc0.GetNrows(); irow++){
448 for (UInt_t ipad = 0; ipad <roc0.GetNPads(irow); ipad++){
449 Float_t value = irow+ipad/1000.;
450 roc0.SetValue(irow,ipad,value);
454 // copy CalROC, readout values and compare to original
455 AliTPCCalROC roc1(roc0);
456 for (UInt_t irow = 0; irow <roc1.GetNrows(); irow++){
457 for (UInt_t ipad = 0; ipad <roc1.GetNPads(irow); ipad++){
458 Float_t value = irow+ipad/1000.;
459 if (roc1.GetValue(irow,ipad)!=value){
460 printf("Read/Write error\trow=%d\tpad=%d\n",irow,ipad);
465 // write original CalROC to file
466 TFile f("calcTest.root","recreate");
468 AliTPCCalROC * roc2 = (AliTPCCalROC*)f.Get("Roc0");
471 // read CalROC from file and compare to original CalROC
472 for (UInt_t irow = 0; irow <roc0.GetNrows(); irow++){
473 if (roc0.GetNPads(irow)!=roc2->GetNPads(irow))
474 printf("NPads - Read/Write error\trow=%d\n",irow);
475 for (UInt_t ipad = 0; ipad <roc1.GetNPads(irow); ipad++){
476 Float_t value = irow+ipad/1000.;
477 if (roc2->GetValue(irow,ipad)!=value){
478 printf("Read/Write error\trow=%d\tpad=%d\n",irow,ipad);
488 AliTPCCalROC roc3(roc0);
490 for (UInt_t irow = 0; irow <roc3.GetNrows(); irow++){
491 for (UInt_t ipad = 0; ipad <roc3.GetNPads(irow); ipad++){
492 Float_t value = irow+ipad/1000. + 1.5;
493 if (TMath::Abs(roc3.GetValue(irow,ipad)-value) > kEpsilon){
494 printf("Add constant - error\trow=%d\tpad=%d\n",irow,ipad);
499 // Add another CalROC
500 AliTPCCalROC roc4(roc0);
501 roc4.Add(&roc0, -1.5);
502 for (UInt_t irow = 0; irow <roc4.GetNrows(); irow++){
503 for (UInt_t ipad = 0; ipad <roc4.GetNPads(irow); ipad++){
504 Float_t value = irow+ipad/1000. - 1.5 * (irow+ipad/1000.);
505 if (TMath::Abs(roc4.GetValue(irow,ipad)-value) > kEpsilon){
506 printf("Add CalROC - error\trow=%d\tpad=%d\n",irow,ipad);
511 // Multiply with constant
512 AliTPCCalROC roc5(roc0);
514 for (UInt_t irow = 0; irow <roc5.GetNrows(); irow++){
515 for (UInt_t ipad = 0; ipad <roc5.GetNPads(irow); ipad++){
516 Float_t value = (irow+ipad/1000.) * (-1.4);
517 if (TMath::Abs(roc5.GetValue(irow,ipad)-value) > kEpsilon){
518 printf("Multiply with constant - error\trow=%d\tpad=%d\n",irow,ipad);
523 // Multiply another CalROC
524 AliTPCCalROC roc6(roc0);
525 roc6.Multiply(&roc0);
526 for (UInt_t irow = 0; irow <roc6.GetNrows(); irow++){
527 for (UInt_t ipad = 0; ipad <roc6.GetNPads(irow); ipad++){
528 Float_t value = (irow+ipad/1000.) * (irow+ipad/1000.);
529 if (TMath::Abs(roc6.GetValue(irow,ipad)-value) > kEpsilon*100){
530 printf("Multiply with CalROC - error\trow=%d\tpad=%d\n",irow,ipad);
537 AliTPCCalROC roc7(roc0);
539 for (UInt_t irow = 0; irow <roc7.GetNrows(); irow++){
540 for (UInt_t ipad = 0; ipad <roc7.GetNPads(irow); ipad++){
542 if (irow+ipad == 0) value = roc0.GetValue(irow,ipad);
543 if (TMath::Abs(roc7.GetValue(irow,ipad)-value) > kEpsilon){
544 printf("Multiply with CalROC - error\trow=%d\tpad=%d\n",irow,ipad);
553 // create CalROC with defined values
555 AliTPCCalROC sroc0(0);
556 for (UInt_t ichannel = 0; ichannel < sroc0.GetNchannels(); ichannel++){
557 Float_t value = rnd.Gaus(10., 2.);
558 sroc0.SetValue(ichannel,value);
561 printf("Mean (should be close to 10): %f\n", sroc0.GetMean());
562 printf("RMS (should be close to 2): %f\n", sroc0.GetRMS());
563 printf("Median (should be close to 10): %f\n", sroc0.GetMedian());
564 printf("LTM (should be close to 10): %f\n", sroc0.GetLTM());
566 //AliTPCCalROC* sroc1 = sroc0.LocalFit(4, 8);
570 // std::cout << TMath::Abs(roc5.GetValue(irow,ipad)-value) << std::endl;
574 AliTPCCalROC * AliTPCCalROC::LocalFit(Int_t rowRadius, Int_t padRadius, AliTPCCalROC* ROCoutliers, Bool_t robust, Double_t chi2Threshold, Double_t robustFraction) {
576 // MakeLocalFit - smoothing
577 // returns a AliTPCCalROC with smoothed data
578 // rowRadius and padRadius specifies a window around a given pad.
579 // The data of this window are fitted with a parabolic function.
580 // This function is evaluated at the pad's position.
581 // At the edges the window is shifted, so that the specified pad is not anymore in the center of the window.
582 // rowRadius - radius - rows to be used for smoothing
583 // padradius - radius - pads to be used for smoothing
584 // ROCoutlier - map of outliers - pads not to be used for local smoothing
585 // robust - robust method of fitting - (much slower)
586 // chi2Threshold: Threshold for chi2 when EvalRobust is called
587 // robustFraction: Fraction of data that will be used in EvalRobust
589 AliTPCCalROC * xROCfitted = new AliTPCCalROC(fSector);
590 TLinearFitter fitterQ(6,"hyp5");
591 // TLinearFitter fitterQ(6,"x0++x1++x2++x3++x4++x5");
592 fitterQ.StoreData(kTRUE);
593 for (UInt_t row=0; row < GetNrows(); row++) {
594 //std::cout << "Entering row " << row << " of " << GetNrows() << " @ sector "<< fSector << " for local fitting... "<< std::endl;
595 for (UInt_t pad=0; pad < GetNPads(row); pad++)
596 xROCfitted->SetValue(row, pad, GetNeighbourhoodValue(&fitterQ, row, pad, rowRadius, padRadius, ROCoutliers, robust, chi2Threshold, robustFraction));
602 Double_t AliTPCCalROC::GetNeighbourhoodValue(TLinearFitter* fitterQ, Int_t row, Int_t pad, Int_t rRadius, Int_t pRadius, AliTPCCalROC *const ROCoutliers, Bool_t robust, Double_t chi2Threshold, Double_t robustFraction) {
604 // AliTPCCalROC::GetNeighbourhoodValue - smoothing - PRIVATE
605 // in this function the fit for LocalFit is done
608 fitterQ->ClearPoints();
609 TVectorD fitParam(6);
613 Float_t lPad[3] = {0};
614 Float_t localXY[3] = {0};
616 AliTPCROC* tpcROCinstance = AliTPCROC::Instance();
617 tpcROCinstance->GetPositionLocal(fSector, row, pad, lPad); // calculate position lPad by pad and row number
619 TArrayI *neighbourhoodRows = 0;
620 TArrayI *neighbourhoodPads = 0;
622 //std::cerr << "Trying to get neighbourhood for row " << row << ", pad " << pad << std::endl;
623 GetNeighbourhood(neighbourhoodRows, neighbourhoodPads, row, pad, rRadius, pRadius);
624 //std::cerr << "Got neighbourhood for row " << row << ", pad " << pad << std::endl;
627 for (Int_t i=0; i < (2*rRadius+1)*(2*pRadius+1); i++) {
628 r = neighbourhoodRows->At(i);
629 p = neighbourhoodPads->At(i);
630 if (r == -1 || p == -1) continue; // window is bigger than ROC
631 tpcROCinstance->GetPositionLocal(fSector, r, p, localXY); // calculate position localXY by pad and row number
632 dlx = lPad[0] - localXY[0];
633 dly = lPad[1] - localXY[1];
640 if (!ROCoutliers || ROCoutliers->GetValue(r,p) != 1) {
641 fitterQ->AddPoint(&xx[1], GetValue(r, p), 1);
646 delete neighbourhoodRows;
647 delete neighbourhoodPads;
649 if (npoints < 0.5 * ((2*rRadius+1)*(2*pRadius+1)) ) {
650 // std::cerr << "Too few data points for fitting @ row " << row << ", pad " << pad << " in sector " << fSector << std::endl;
651 return 0.; // for diagnostic
654 fitterQ->GetParameters(fitParam);
656 if (robust) chi2Q = fitterQ->GetChisquare()/(npoints-6.);
657 //if (robust) chi2Q = fitterQ->GetChisquare()/(npoints-6.);
658 if (robust && chi2Q > chi2Threshold) {
659 //std::cout << "robust fitter called... " << std::endl;
660 fitterQ->EvalRobust(robustFraction);
661 fitterQ->GetParameters(fitParam);
663 Double_t value = fitParam[0];
665 //if (value < 0) std::cerr << "negative fit-value " << value << " in sector "<< this->fSector << " @ row: " << row << " and pad: " << pad << ", with fitter Chi2 = " << chi2Q << std::endl;
672 void AliTPCCalROC::GetNeighbourhood(TArrayI* &rowArray, TArrayI* &padArray, Int_t row, Int_t pad, Int_t rRadius, Int_t pRadius) {
674 // AliTPCCalROC::GetNeighbourhood - PRIVATE
675 // in this function the window for LocalFit is determined
677 rowArray = new TArrayI((2*rRadius+1)*(2*pRadius+1));
678 padArray = new TArrayI((2*rRadius+1)*(2*pRadius+1));
680 Int_t rmin = row - rRadius;
681 UInt_t rmax = row + rRadius;
683 // if window goes out of ROC
688 if (rmax >= GetNrows()) {
689 rmin = rmin - (rmax - GetNrows()+1);
690 rmax = GetNrows() - 1;
691 if (rmin < 0 ) rmin = 0; // if the window is bigger than the ROC
697 for (UInt_t r = rmin; r <= rmax; r++) {
698 pmin = pad - pRadius;
699 pmax = pad + pRadius;
704 if (pmax >= (Int_t)GetNPads(r)) {
705 pmin = pmin - (pmax - GetNPads(r)+1);
706 pmax = GetNPads(r) - 1;
707 if (pmin < 0 ) pmin = 0; // if the window is bigger than the ROC
709 for (Int_t p = pmin; p <= pmax; p++) {
715 for (Int_t j = i; j < rowArray->GetSize(); j++){ // unused padArray-entries, in the case that the window is bigger than the ROC
716 //std::cout << "trying to write -1" << std::endl;
719 //std::cout << "writing -1" << std::endl;
725 void AliTPCCalROC::GlobalFit(const AliTPCCalROC* ROCoutliers, Bool_t robust, TVectorD &fitParam, TMatrixD &covMatrix, Float_t & chi2, Int_t fitType, Double_t chi2Threshold, Double_t robustFraction, Double_t err){
727 // Makes a GlobalFit for the given secotr and return fit-parameters, covariance and chi2
728 // The origin of the fit function is the center of the ROC!
729 // fitType == 0: fit plane function
730 // fitType == 1: fit parabolic function
731 // ROCoutliers - pads with value !=0 are not used in fitting procedure
732 // chi2Threshold: Threshold for chi2 when EvalRobust is called
733 // robustFraction: Fraction of data that will be used in EvalRobust
734 // err: error of the data points
736 TLinearFitter* fitterG = 0;
740 fitterG = new TLinearFitter (6,"x0++x1++x2++x3++x4++x5");
741 fitParam.ResizeTo(6);
742 covMatrix.ResizeTo(6,6);
744 fitterG = new TLinearFitter(3,"x0++x1++x2");
745 fitParam.ResizeTo(3);
746 covMatrix.ResizeTo(3,3);
748 fitterG->StoreData(kTRUE);
749 fitterG->ClearPoints();
753 Float_t centerPad[3] = {0};
754 Float_t localXY[3] = {0};
756 AliTPCROC* tpcROCinstance = AliTPCROC::Instance();
757 tpcROCinstance->GetPositionLocal(fSector, GetNrows()/2, GetNPads(GetNrows()/2)/2, centerPad); // calculate center of ROC
759 // loop over all channels and read data into fitterG
760 for (UInt_t irow = 0; irow < GetNrows(); irow++) {
761 for (UInt_t ipad = 0; ipad < GetNPads(irow); ipad++) {
763 if (ROCoutliers && ROCoutliers->GetValue(irow, ipad) != 0) continue;
764 tpcROCinstance->GetPositionLocal(fSector, irow, ipad, localXY); // calculate position localXY by pad and row number
765 dlx = localXY[0] - centerPad[0];
766 dly = localXY[1] - centerPad[1];
774 fitterG->AddPoint(xx, GetValue(irow, ipad), err);
777 if(npoints>10) { // make sure there is something to fit
779 fitterG->GetParameters(fitParam);
780 fitterG->GetCovarianceMatrix(covMatrix);
782 chi2 = fitterG->GetChisquare()/(npoints-6.);
783 else chi2 = fitterG->GetChisquare()/(npoints-3.);
784 if (robust && chi2 > chi2Threshold) {
785 // std::cout << "robust fitter called... " << std::endl;
786 fitterG->EvalRobust(robustFraction);
787 fitterG->GetParameters(fitParam);
790 // set parameteres to 0
791 Int_t nParameters = 3;
795 for(Int_t i = 0; i < nParameters; i++)
803 AliTPCCalROC* AliTPCCalROC::CreateGlobalFitCalROC(TVectorD &fitParam, Int_t sector){
805 // Create ROC with global fit parameters
806 // The origin of the fit function is the center of the ROC!
807 // loop over all channels, write fit values into new ROC and return it
810 Float_t centerPad[3] = {0};
811 Float_t localXY[3] = {0};
812 AliTPCCalROC * xROCfitted = new AliTPCCalROC(sector);
813 AliTPCROC* tpcROCinstance = AliTPCROC::Instance();
814 tpcROCinstance->GetPositionLocal(sector, xROCfitted->GetNrows()/2, xROCfitted->GetNPads(xROCfitted->GetNrows()/2)/2, centerPad); // calculate center of ROC
816 if (fitParam.GetNoElements() == 6) fitType = 1;
819 if (fitType == 1) { // parabolic fit
820 for (UInt_t irow = 0; irow < xROCfitted->GetNrows(); irow++) {
821 for (UInt_t ipad = 0; ipad < xROCfitted->GetNPads(irow); ipad++) {
822 tpcROCinstance->GetPositionLocal(sector, irow, ipad, localXY); // calculate position localXY by pad and row number
823 dlx = localXY[0] - centerPad[0];
824 dly = localXY[1] - centerPad[1];
825 value = fitParam[0] + fitParam[1]*dlx + fitParam[2]*dly + fitParam[3]*dlx*dlx + fitParam[4]*dly*dly + fitParam[5]*dlx*dly;
826 xROCfitted->SetValue(irow, ipad, value);
831 for (UInt_t irow = 0; irow < xROCfitted->GetNrows(); irow++) {
832 for (UInt_t ipad = 0; ipad < xROCfitted->GetNPads(irow); ipad++) {
833 tpcROCinstance->GetPositionLocal(sector, irow, ipad, localXY); // calculate position localXY by pad and row number
834 dlx = localXY[0] - centerPad[0];
835 dly = localXY[1] - centerPad[1];
836 value = fitParam[0] + fitParam[1]*dlx + fitParam[2]*dly;
837 xROCfitted->SetValue(irow, ipad, value);