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我在R中使用adehabitatHR，試圖計算家庭範圍重疊。我成功地爲兩個不同的動物（分別是個體70F和153F）加載了兩個.tsv文件和位置數據。 .tsv文件有5列，其中2列是緯度和經度數據（DDE和DDS）;以十進制度數。然而，當我嘗試轉換爲座標，我得到以下錯誤：錯誤.local（obj，）cannat從非數字矩陣派生座標
coordinates (locs153M) < - c ("DDE", "DDS") Error in .local(obj, ...) : cannot derive coordinates from non-numeric matrix
這裏是我的腳本：
> locs07F <- read.delim("C:\\Users\\cpickering\\Documents\\Black Rhino\\Management Plan 2015\\Maps\\Sightings_07F.tsv", header = TRUE)
> library(adehabitatHR)
Loading required package: sp
Loading required package: deldir
deldir 0.1-9
Loading required package: ade4
Loading required package: adehabitatMA
Loading required package: adehabitatLT
Loading required package: CircStats
Loading required package: MASS
Loading required package: boot
> library (maptools)
Checking rgeos availability: TRUE
> library(rgeoos)
Error in library(rgeoos) : there is no package called ‘rgeoos’
> library (rgeos)
rgeos version: 0.3-13, (SVN revision 508)
GEOS runtime version: 3.4.2-CAPI-1.8.2 r3921
Linking to sp version: 1.2-0
Polygon checking: TRUE
警告消息：
package ‘rgeos’ was built under R version 3.2.2
> class (locs07F)
[1] "data.frame"
> coordinates (locs07F) < - c ("DDE", "DDS")
Error in .local(obj, ...) :
cannot derive coordinates from non-numeric matrix
> locs153M <- read.delim("C:\\Users\\cpickering\\Documents\\Black Rhino\\Management Plan 2015\\Maps\\Sightings_153M.tsv", header = TRUE)
> class (locs153M)
[1] "data.frame"
> coordinates (locs153M) < - c ("DDE", "DDS")
Error in .local(obj, ...) :
cannot derive coordinates from non-numeric matrix
> locs153M(,)
Error: could not find function "locs153M"
> head("locs153M", n = 10)
[1] "locs153M"
> head(locs153M)
SightingID Date DDS DDE RhinosAtSighting
1 2489 24/08/2015 -27.85235 32.29086 161, 07, 07-C-2014,
2 2472 15/08/2015 -27.84257 32.30194 160, 161,
3 2447 09/07/2015 -27.85831 32.29140 161,
4 2438 01/07/2015 -27.83754 32.31780 154, 160,
5 2424 06/06/2015 -27.84686 32.35096 154, 160,
6 2403 20/05/2015 -27.83959 32.30993 161,
> summary(locs153M)
SightingID Date DDS DDE RhinosAtSighting
Min. :1032 15/04/2014: 2 Min. :-27.87 Min. :32.28 07, :25
1st Qu.:1378 01/07/2013: 1 1st Qu.:-27.85 1st Qu.:32.30 154, :14
Median :1645 01/07/2015: 1 Median :-27.85 Median :32.31 07, 161, : 7
Mean :1743 01/09/2011: 1 Mean :-27.85 Mean :32.32 161, : 6
3rd Qu.:2153 02/02/2012: 1 3rd Qu.:-27.84 3rd Qu.:32.32 160, : 5
Max. :2489 02/04/2014: 1 Max. :-27.83 Max. :32.35 : 4
(Other) :76 (Other) :22
> library (rgdal)
rgdal: version: 1.0-7, (SVN revision 559)
Geospatial Data Abstraction Library extensions to R successfully loaded
Loaded GDAL runtime: GDAL 1.11.2, released 2015/02/10
Path to GDAL shared files: C:/Program Files/R/R-3.2.1/library/rgdal/gdal
GDAL does not use iconv for recoding strings.
Loaded PROJ.4 runtime: Rel. 4.9.1, 04 March 2015, [PJ_VERSION: 491]
Path to PROJ.4 shared files: C:/Program Files/R/R-3.2.1/library/rgdal/proj
Linking to sp version: 1.2-0
> coordinates (locs153M) < - c ("DDE", "DDS")
Error in .local(obj, ...) :
cannot derive coordinates from non-numeric matrix
我難倒。有人有主意嗎？