Am 01.09.2019 um 15:09 schrieb luis.salazar.ramirez: Hi, could you tell us please what gretl version you are using (and on which platform). Also, it would be helpful to have an example that we can use to reproduce the problem, if possible. thanks sven

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/