我无法回答您为什么会出现错误(因为代码在我的机器上运行良好),但我会建议您遵循 R-hel 发布指南中的建议,并包含有关您的版本的更多详细信息和设置。:
> model1
150 samples
4 predictors
2 classes: 'other', 'versicolor'
No pre-processing
Resampling: Bootstrap (25 reps)
Summary of sample sizes: 150, 150, 150, 150, 150, 150, ...
Resampling results across tuning parameters:
alpha lambda Accuracy Kappa Accuracy SD Kappa SD
0.1 0.1 0.698 0.19 0.0419 0.0891
0.1 0.462 0.675 0.0311 0.0399 0.0719
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我有一个相当完整的会议,你的肯定会有所不同。由于功能已被稍后在会话中加载的其他包屏蔽,可能会出现冲突。刚才加载“插入符号”时出现了很多警告。
> sessionInfo()
R version 2.14.0 Patched (2011-11-13 r57650)
Platform: x86_64-apple-darwin9.8.0/x86_64 (64-bit)
locale:
[1] en_US.UTF-8/en_US.UTF-8/en_US.UTF-8/C/en_US.UTF-8/en_US.UTF-8
attached base packages:
[1] tools stats4 grid splines stats graphics grDevices utils
[9] datasets methods base
other attached packages:
[1] glmnet_1.7.1 Matrix_1.0-1 e1071_1.6 class_7.3-3
[5] caret_5.09-012 foreach_1.3.2 codetools_0.2-8 iterators_1.0.5
[9] cluster_1.14.1 mlogit_0.2-1 maxLik_1.0-2 miscTools_0.6-10
[13] lmtest_0.9-29 statmod_1.4.13 Formula_1.0-1 mvbutils_2.5.101
[17] data.table_1.7.1 party_0.9-99995 vcd_1.2-12 colorspace_1.1-0
[21] strucchange_1.4-6 sandwich_2.2-8 coin_1.0-20 modeltools_0.2-18
[25] lubridate_0.2.5 quantreg_4.71 SparseM_0.89 raster_1.9-41
[29] MASS_7.3-16 ks_1.8.4 misc3d_0.8-1 rgl_0.92.798
[33] mvtnorm_0.9-9991 KernSmooth_2.23-7 sp_0.9-91 latticeExtra_0.6-19
[37] RColorBrewer_1.0-5 zoo_1.7-6 ggplot2_0.8.9 proto_0.3-9.2
[41] reshape_0.8.4 plyr_1.6 rms_3.3-2 Hmisc_3.9-0
[45] survival_2.36-10 sos_1.3-1 brew_1.0-6 lattice_0.20-0
loaded via a namespace (and not attached):
[1] compiler_2.14.0 digest_0.5.1 stringr_0.5