Good evening Helmut, Thank you for reply (nice try, expert :-) ). Don't understand the presence of 1, he is absent in the formula. Neither the choice of number 50. So, in a spreadsheet is something like the following example: =MÁXIMO(1,150/50,338/50)=6.76 If using 10: =MÁXIMO(1,150/10,338/10)=33.80
Regards Cumprimentos, *Valter Albino -* Geógrafo Físico, M.Sc. Modelação H&H / Riscos ambientais / OT&U www.valteralbino.wixsite.com/hydrodynamics Helmut Kudrnovsky <[email protected]> escreveu no dia segunda, 3/02/2020 à(s) 18:09: > Valter Albino wrote > > Good afternoon > > > > From the function "r.flow" ( > > https://grass.osgeo.org/grass78/manuals/r.flow.html), can some expert > > explain me what is the meaning of: "val-th" and the meaning of: "max(1, > > <rows > > in elevation> > > /50, > > <cols in elevation> > > /50)." > > no expert here on my side, though, from the manual: > > skip=integer > Number of cells between flowlines > > Another option, skip, indicates that only the flowlines from every val-th > cell are to be included in flowline. > > => it may be something like: val-th value is the threshold value given by > skip > > The default skip is max(1, <rows in elevation>/50, <cols in elevation>/50) > > => it's the calculation of the default skip value if no skip=integer figure > is given. > > see the r.mapcalc manual: > https://grass.osgeo.org/grass78/manuals/r.mapcalc.html > > max(x,y[,z...]) largest value of those listed > > contribution for precising the manual welcome. > > > > > > > ----- > best regards > Helmut > -- > Sent from: http://osgeo-org.1560.x6.nabble.com/Grass-Users-f3884509.html > _______________________________________________ > grass-user mailing list > [email protected] > https://lists.osgeo.org/mailman/listinfo/grass-user
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