When adding steps for plotting, we have to add in every point twice, so we get...

When adding steps for plotting, we have to add in every point twice, so we get a step shape and not interpolation.

mc_work/dorun.go

@@ -190,6 +190,7 @@ func saveStep(cprm *cprm, n int, tmprtr float64, x []float32, fTrial float64) {
 		cprm.plotf = append(cprm.plotf, fprev)            // copy the last coordinates
 		cprm.plotf = append(cprm.plotf, fTrial)           // and append them
 		cprm.plotTmprtr = append(cprm.plotTmprtr, tmprtr) // then the new ones
+		cprm.plotTmprtr = append(cprm.plotTmprtr, tmprtr) // then the new ones
 	}
 	if cprm.xplotWrt != nil { // The trajectory
 		cprm.plotXtrj = append(cprm.plotXtrj, xprev...)
@@ -299,6 +300,7 @@ func DoRun(mcPrm *McPrm) (MCresult, error) {
 	if fTrial != fOld { // last move was not accepted, so we have to add last step
 		saveStep(&cprm, mcPrm.NStep, tmprtr, x, fOld)
 	}
+
 	defer fmt.Println("n accepted:", nAcc, "of", mcPrm.NStep)
 	if bestX != nil {
 		defer fmt.Printf("Best function value: %.2f at %.2v\n", bestfval, bestX)