[Gretl-users] Re: A tiny error on plots

Thanks Sven and Allin: I was writing explaining my point now but like you say Allin, reading the documentation never say that the first parameter for --band can be a number. Thanks for your reply, and I take note about your example in <hansl>. Cheers. Cordially Luis Salazar El 1/09/19 a las 11:13 a. m., Allin Cottrell escribió: > On Sun, 1 Sep 2019, luis.salazar.ramirez wrote: > >> Good day por you: >> >> Last days I'm making a graphs for a work, when I tried to graph a >> bandplot with values tiny it appear wrong. I looked the code and find: >> >> In the gnuplot code generated appear: >> >> plot '-' using 1:($2-1.96*$3):($2+1.96*$3) notitle lc rgb "#efefef" w >> filledcurve, \ >> 0 notitle w lines lt 0, \ >> '-' using 1:2 title 'uAC' w lines lt 1 >> 2000 1 0.2507141113 >> >> The value 1 after 2000 it's the central value for the band in the >> generated code but my script code was: >> >> gnuplot u$i --time-series --band=0, band$i, 1.96 --with-lines \ >>    --output=display --band-style=fill,0xefefef >> >> I check others graphs and always appear the 1 value, for big values >> there isn't problem but for tiny values the band appear in the wrong >> place. >> >> The coding gretl solution: change the value 1 for the first argument in >> the --band option. > > Actually this is not a bug. The key point is that the first element > after "--band=" is supposed to be a series, not a scalar value, and > according to the help text it can be given by "name or ID number". So if > you type "0" in that place gretl takes it to mean the series with ID > number 0, "const", which has a constant value of 1. > > A call to gnuplot which will do what you want would be something like > the following: > > <hansl> > nulldata 20 > setobs 1 2000 --time-series > series y = 0 # set up the zero baseline > series se_y = normal()/10 > gnuplot y --time-series --band=y,se_y,1.96 --with-lines \ >   --output=display > </hansl> > > Allin > _______________________________________________ > Gretl-users mailing list -- gretl-users(a)gretlml.univpm.it > To unsubscribe send an email to gretl-users-leave(a)gretlml.univpm.it > Website: > https://gretlml.univpm.it/postorius/lists/gretl-users.gretlml.univpm.it/