Hi Cecilia,
print(fnp) and print(a_10) are not exactly the same
>> print(fnp)
> $a_10
> class : SpatialPolygonsDataFrame
vs.
>> print(a_10)
> class : SpatialPolygonsDataFrame
Looks like mget returns a list.
Can you try:
fnp <- get(afiles[ifile])[1]
print(fnp)
#the $a_10 should be gone.
cheers
Peter
> On 27 Jul 2015, at 18:33, SisoL <cecilia.larros...@imperial.ac.uk> wrote:
>
> Hi Peter,
>
> Thank you for your reply. The method for looping seems to work, but
> gDistance will not recognise the input. I am puzzled because when I
> print(fnp), and print (a_10) they look exactly the same, but when I try to
> run gDistance{rgeos} with a_10 it works, but with fnp it throws an error.
> Please see below. Any other suggestions?
>
>> afiles <- ls(pattern= "a_") #OK
>> print(afiles)
> [1] "a_1" "a_10"
>
>> fnp<- mget(afiles[ifile]) #OK
>
>> print(fnp)
> $a_10
> class : SpatialPolygonsDataFrame
> features : 5
> extent : 825796.9, 831270.1, 815666.9, 816562.5 (xmin, xmax, ymin,
> ymax)
> coord. ref. : +proj=aea +lat_1=-5 +lat_2=-42 +lat_0=-32 +lon_0=-60 +x_0=0
> +y_0=0 +ellps=aust_SA +units=m +no_defs
> variables : 5
> names : ID, GRIDCODE, Shape_Leng, Shape_Area, Count
> min values : 1, 1, 94.2722341164, 6.47354525991, 1
> max values : 5, 1, 2305.45647624, 92111.8528756, 1
>
>> print(a_10)
> class : SpatialPolygonsDataFrame
> features : 5
> extent : 825796.9, 831270.1, 815666.9, 816562.5 (xmin, xmax, ymin,
> ymax)
> coord. ref. : +proj=aea +lat_1=-5 +lat_2=-42 +lat_0=-32 +lon_0=-60 +x_0=0
> +y_0=0 +ellps=aust_SA +units=m +no_defs
> variables : 5
> names : ID, GRIDCODE, Shape_Leng, Shape_Area, Count
> min values : 1, 1, 94.2722341164, 6.47354525991, 1
> max values : 5, 1, 2305.45647624, 92111.8528756, 1
>
>> distance.matrix<- gDistance(fnp, spgeom2= NULL, byid=T)
> Error in (function (classes, fdef, mtable) :
> unable to find an inherited method for function ‘is.projected’ for
> signature ‘"list"’
>
>
>
>
> --
> View this message in context:
> http://r.789695.n4.nabble.com/Varying-name-of-output-tables-from-looped-process-of-list-of-spdf-objects-tp4710369p4710408.html
> Sent from the R help mailing list archive at Nabble.com.
>
> ______________________________________________
> R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
______________________________________________
R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
