Aihong, No way for TGraph to distinguish between a point not initialized and (0,0). If you have this kind of problem, create your arrays x and y yourself, then call the standard TGraph constructor with (n,x,y). Rene Brun Aihong Tang wrote: > > Hi: > > I'd like to make a comment on TGraph. > > Suppose I declare a graph "gr" by: > TGraph gr(10) > This means allocate room for 10 points. > > Later on I do not fill points up to 10, say I > just put 7 points into "gr".(this does happen > in code because sometime the # of points inputed > depends on sth else.) > > Then when I call gr.Fit(...), I think it will fit > based on my 7 points and another 3 points at (0,0). > > Ofcourse we do not want to include those Zeros in > the fitting. > > This is not critical, but not convenient for > the user. > > Correct me if I am wrong? Thanks. > > Aihong
This archive was generated by hypermail 2b29 : Tue Jan 04 2000 - 00:43:44 MET