checkpoint("2019-12-11",R.version = "3.5.3",scanForPackages = FALSE,verbose = TRUE,use.knitr=FALSE, auto.install.knitr = FALSE, scan.rnw.with.knitr = TRUE,forceInstall = FALSE, forceProject = FALSE, use.lock = TRUE)
r$> packageVersion('checkpoint')
[1] '0.4.9'
r$> library(knitr)
r$> library(rmarkdown)
r$> library(MASS)
Error in value[[3L]](cond) :
Package 'MASS' version 7.3.51.3 cannot be unloaded:
Error in unloadNamespace(package) : namespace 'MASS' is imported by 'vegan' so cannot be unloaded
当我遇到此错误时,我remove.packages('MASS')
并重新安装,但无法解决此问题。如何解决这个问题?
unloadNamespace('mirt')
unloadNamespace('vegan')
解决了这个问题。
但是当我在vs代码中打开R端子时,我很好奇,然后sessionInfo()
,输出如下:
[1] Rcpp_1.0.1 lattice_0.20-38 permute_0.9-5 MASS_7.3-51.1 grid_3.5.3 jsonlite_1.6.1 nlme_3.1-137 stats4_3.5.3 vegan_2.5-4 Matrix_1.2-15 [11] pbivnorm_0.6.0 splines_3.5.3 tools_3.5.3 dcurver_0.9.1 compiler_3.5.3 GPArotation_2014.11-1 Deriv_3.8.5 parallel_3.5.3 mnormt_1.5-5 cluster_2.0.7-1 [21] mgcv_1.8-27 lavaan_0.6-3
我不知道此软件包如何自动加载。