我将R与RStudio一起使用，并在循环中得到了真正的磨损行为。我将k值从0.1循环到0.1乘10，当k等于4.4时，它会磨损。我运行以下简单代码进行检查：
#rm(list = ls())
#gc()
for(k in seq(from=0.1,to=10,by=0.1)){
print(k)
if(k == 4.4){
print('a')
}
if(k == 4.5){
print('a')
}
}
输出应为从0.1到10的顺序，在4.4 a之后和4.5之后。但是仅打印对应于值4.5的值。 4.5的if语句是另一个语句的复制粘贴，仅将4改为5。我的检查代码输出为：
[1] 0.1
[1] 0.2
[1] 0.3
[1] 0.4
[1] 0.5
[1] 0.6
[1] 0.7
[1] 0.8
[1] 0.9
[1] 1
[1] 1.1
[1] 1.2
[1] 1.3
[1] 1.4
[1] 1.5
[1] 1.6
[1] 1.7
[1] 1.8
[1] 1.9
[1] 2
[1] 2.1
[1] 2.2
[1] 2.3
[1] 2.4
[1] 2.5
[1] 2.6
[1] 2.7
[1] 2.8
[1] 2.9
[1] 3
[1] 3.1
[1] 3.2
[1] 3.3
[1] 3.4
[1] 3.5
[1] 3.6
[1] 3.7
[1] 3.8
[1] 3.9
[1] 4
[1] 4.1
[1] 4.2
[1] 4.3
[1] 4.4
[1] 4.5
[1] "a"
[1] 4.6
[1] 4.7
[1] 4.8
[1] 4.9
[1] 5
[1] 5.1
[1] 5.2
[1] 5.3
[1] 5.4
[1] 5.5
[1] 5.6
[1] 5.7
[1] 5.8
[1] 5.9
[1] 6
[1] 6.1
[1] 6.2
[1] 6.3
[1] 6.4
[1] 6.5
[1] 6.6
[1] 6.7
[1] 6.8
[1] 6.9
[1] 7
[1] 7.1
[1] 7.2
[1] 7.3
[1] 7.4
[1] 7.5
[1] 7.6
[1] 7.7
[1] 7.8
[1] 7.9
[1] 8
[1] 8.1
[1] 8.2
[1] 8.3
[1] 8.4
[1] 8.5
[1] 8.6
[1] 8.7
[1] 8.8
[1] 8.9
[1] 9
[1] 9.1
[1] 9.2
[1] 9.3
[1] 9.4
[1] 9.5
[1] 9.6
[1] 9.7
[1] 9.8
[1] 9.9
[1] 10
sessionInfo（）的输出是：
R version 3.6.0 (2019-04-26)
Platform: x86_64-pc-linux-gnu (64-bit)
Running under: Debian GNU/Linux 9 (stretch)
Matrix products: default
BLAS: /usr/lib/libblas/libblas.so.3.7.0
LAPACK: /usr/lib/lapack/liblapack.so.3.7.0
Random number generation:
RNG: Mersenne-Twister
Normal: Inversion
Sample: Rounding
locale:
[1] LC_CTYPE=es_AR.UTF-8 LC_NUMERIC=C LC_TIME=es_AR.UTF-8
[4] LC_COLLATE=es_AR.UTF-8 LC_MONETARY=es_AR.UTF-8 LC_MESSAGES=es_AR.UTF-8
[7] LC_PAPER=es_AR.UTF-8 LC_NAME=C LC_ADDRESS=C
[10] LC_TELEPHONE=C LC_MEASUREMENT=es_AR.UTF-8 LC_IDENTIFICATION=C
attached base packages:
[1] stats graphics grDevices utils datasets methods base
other attached packages:
[1] purrr_0.3.2 sp_1.3-1 MissingData_0.1.0 zoo_1.8-6 scales_1.0.0
[6] lubridate_1.7.4 ggplot2_3.1.1
loaded via a namespace (and not attached):
[1] Rcpp_1.0.1 pillar_1.4.1 compiler_3.6.0 plyr_1.8.4
[5] iterators_1.0.10 xts_0.11-2 tools_3.6.0 gstat_2.0-2
[9] digest_0.6.19 tibble_2.1.2 gtable_0.3.0 lattice_0.20-38
[13] pkgconfig_2.0.2 rlang_0.3.4 foreach_1.4.4 rstudioapi_0.10
[17] mblm_0.12.1 withr_2.1.2 dplyr_0.8.1 stringr_1.4.0
[21] gtools_3.8.1 grid_3.6.0 tidyselect_0.2.5 spacetime_1.2-2
[25] glue_1.3.1 R6_2.4.0 RobustLinearReg_0.1.0 SignifReg_2.0
[29] reshape2_1.4.3 magrittr_1.5 codetools_0.2-16 splines_3.6.0
[33] intervals_0.15.1 MASS_7.3-51.4 assertthat_0.2.1 colorspace_1.4-1
[37] labeling_0.3 stringi_1.4.3 lazyeval_0.2.2 munsell_0.5.0
[41] gam_1.16 FNN_1.1.3 crayon_1.3.4