Stepwise elimination of numerical covariates for lancol 


Variance inflation factors

              GVIF
alt   1.693880e+02
bio01 4.031966e+02
bio05 1.789764e+02
bio06 2.636200e+01
bio12 4.732117e+01
prec  7.223839e+01
tmean 8.936886e+02
etp   7.016570e+00
gr01  1.459074e+10
gr02  1.605910e+09
gr03  3.601071e+08
gr04  7.683960e+10
gr05  2.499969e+09
gr06  2.729876e+09
gr07  2.233016e+10
gr08  3.959079e+09
gr09  1.227924e+10
gr10  8.233169e+10
gr11  1.998234e+10
gr12  2.098785e+10
gr13  1.395810e+10
gr14  4.080571e+09
gr15  2.466603e+09
gr16  8.656135e+09
gr17  8.269040e+08
gr18  6.292771e+09

Drop gr10 !

Variance inflation factors

            GVIF
alt   169.374615
bio01 403.195083
bio05 178.976044
bio06  26.361632
bio12  47.322843
prec   72.239721
tmean 893.689479
etp     7.016275
gr01    1.154764
gr02    1.026689
gr03    1.006360
gr04    1.795081
gr05    1.034541
gr06    1.037364
gr07    1.182963
gr08    1.047108
gr09    1.180046
gr11    1.707969
gr12    1.500707
gr13    2.423778
gr14    1.037894
gr15    1.318942
gr16    1.457625
gr17    1.017494
gr18    1.197514

Drop tmean !

Variance inflation factors

            GVIF
alt    52.879385
bio01 206.476032
bio05  98.231470
bio06  18.853448
bio12  46.272551
prec   64.498302
etp     6.984770
gr01    1.154326
gr02    1.024871
gr03    1.004001
gr04    1.787025
gr05    1.033041
gr06    1.037357
gr07    1.180852
gr08    1.042981
gr09    1.173577
gr11    1.706968
gr12    1.500253
gr13    2.423749
gr14    1.037832
gr15    1.315682
gr16    1.420191
gr17    1.016987
gr18    1.197490

Drop bio01 !

Variance inflation factors

           GVIF
alt   48.492589
bio05 32.527427
bio06  5.284589
bio12 43.729837
prec  56.845491
etp    6.854795
gr01   1.152198
gr02   1.024859
gr03   1.003765
gr04   1.783037
gr05   1.032867
gr06   1.029642
gr07   1.171435
gr08   1.042950
gr09   1.119789
gr11   1.656358
gr12   1.458045
gr13   2.380412
gr14   1.037278
gr15   1.299571
gr16   1.412041
gr17   1.016796
gr18   1.191903

Drop prec !

Variance inflation factors

           GVIF
alt   43.025334
bio05 29.565275
bio06  3.369907
bio12  6.602593
etp    6.829326
gr01   1.152189
gr02   1.023635
gr03   1.003239
gr04   1.777769
gr05   1.032817
gr06   1.026808
gr07   1.170914
gr08   1.041583
gr09   1.116063
gr11   1.649403
gr12   1.455353
gr13   2.323172
gr14   1.036214
gr15   1.269037
gr16   1.391261
gr17   1.015327
gr18   1.177585

Drop alt !

Variance inflation factors

           GVIF
bio05 12.187790
bio06  3.364493
bio12  4.415656
etp    6.585921
gr01   1.134538
gr02   1.023408
gr03   1.003231
gr04   1.746479
gr05   1.032317
gr06   1.025536
gr07   1.145061
gr08   1.037435
gr09   1.098297
gr11   1.620075
gr12   1.445936
gr13   2.149989
gr14   1.031510
gr15   1.245924
gr16   1.367354
gr17   1.014272
gr18   1.170653

Drop bio05 !

Variance inflation factors

          GVIF
bio06 2.680968
bio12 3.807015
etp   4.893512
gr01  1.123826
gr02  1.021459
gr03  1.003081
gr04  1.641715
gr05  1.026947
gr06  1.022816
gr07  1.141667
gr08  1.032408
gr09  1.092252
gr11  1.557412
gr12  1.435474
gr13  1.706762
gr14  1.031276
gr15  1.115234
gr16  1.321822
gr17  1.009057
gr18  1.164023

Drop etp !

Variance inflation factors

          GVIF
bio06 2.004257
bio12 3.031379
gr01  1.123826
gr02  1.021449
gr03  1.003071
gr04  1.637794
gr05  1.025123
gr06  1.022035
gr07  1.141555
gr08  1.031924
gr09  1.091878
gr11  1.329856
gr12  1.263953
gr13  1.652683
gr14  1.029439
gr15  1.107720
gr16  1.268091
gr17  1.008978
gr18  1.150578

Drop bio12 !

Variance inflation factors

          GVIF
bio06 1.779397
gr01  1.082763
gr02  1.015921
gr03  1.003070
gr04  1.442612
gr05  1.013786
gr06  1.018747
gr07  1.123633
gr08  1.022078
gr09  1.072437
gr11  1.274920
gr12  1.248186
gr13  1.202766
gr14  1.026470
gr15  1.044731
gr16  1.134481
gr17  1.008412
gr18  1.083899


Variables meeting VIF criterium:
 [1] "bio06" "gr01"  "gr02"  "gr03"  "gr04"  "gr05"  "gr06"  "gr07"  "gr08" 
[10] "gr09"  "gr11"  "gr12"  "gr13"  "gr14"  "gr15"  "gr16"  "gr17"  "gr18" 
