Dear Alessandro,
it would be easier to give you a constructive answer if you provided at
least the code that you used.
The SAGA module that you mention does not (yet) have a front-end
function in the RSAGA package, so I assume that you are using the
low-level rsaga.geoprocessor function, which is a bit trickier. I hope
you have carefully read the information provided by rsaga.get.usage on
the usage of this module.
Cheers
Alex
Alessandro wrote:
Hi all and thanks for help,
I have a shapefile "canopy_height.shp" with two column "a" and "b". I wish
to do a-b and to obtain a third column ("a-b"). I am using the R+SAGA
module: "Table calculator for shapes", and all run good, but when I open the
shape-file after (in ARCMAP) I don't see the third column. There is a
option to save a new shape-file?
Thanks for Help
Ale
SAGA CMD 2.0.3
library path: C:\Windows/modules
library name: table_calculus
module name : Table calculator for shapes
author :
error: executing module [Table calculator for shapes]
Usage: -silent -SHAPES <str> [-FORMULA <str>] [-NAME <str>]
-SHAPES:<str> Shapes
Shapes (input)
-FORMULA:<str> Formula
Text
-NAME:<str> Field Name
Text
The value for the option 'SHAPES' must be specified.
rsaga.geoprocessor(lib="table_calculus", module=2,
param=list(SHAPES="canopy_height.shp", FORMULA="a-b", NAME="a-b"))
SAGA CMD 2.0.3
library path: C:\Windows/modules
library name: table_calculus
module name : Table calculator for shapes
author :
Load shapes: canopy_height.shp...
Parameters
Shapes: canopy_height.shp
Formula: a-b
Field Name: a-b
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Alexander Brenning
brenn...@uwaterloo.ca - T +1-519-888-4567 ext 35783
Department of Geography and Environmental Management
University of Waterloo
200 University Ave. W - Waterloo, ON - Canada N2L 3G1
http://www.fes.uwaterloo.ca/geography/faculty/brenning/
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