Hi Glynn and Rainer Happy to see this exchange of ideas. It would be great if this could be implemented. Do you think it is useful I make a feature request on the bug tracker (with link to this email thread) so the idea doesn't get lost?
On Fri, May 17, 2013 at 4:38 PM, Glynn Clements <gl...@gclements.plus.com>wrote: > > Rainer M. Krug wrote: > > > > One option is to modify round() to take a second argument (defaulting > > > to 1), and have it return the first argument rounded to the nearest > > > multiple of the second. The return type would be that of the second > > > argument, i.e. round(x,1) rounds to the nearest integer and returns an > > > integer, round(x,1.0) rounds to the nearest integer and returns a > > > float, round(x,1e-3) would round to 3 decimal places (i.e. the nearest > > > multiple of 0.001), etc. > > > > Sounds like a sensible approach without adding to many new > > functions. But I would actually split the two, i.e. have two more > > arguments, where one specifies the type, > > and the other one the number of decimals to round to, i.e. > > > > round(x, 0, "I") would be the default, rounding to whole number and > > return an integer > > That interface isn't possible. r.mapcalc doesn't have a string type, > and there's no way that a function's return type can depend upon the > value of a parameter. > > -- > Glynn Clements <gl...@gclements.plus.com> > _______________________________________________ > grass-dev mailing list > grass-dev@lists.osgeo.org > http://lists.osgeo.org/mailman/listinfo/grass-dev >
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