已解决，差了一个zoo包

楼主，multcomp包现在是不是不能用了，为什么我安装总显示出：
library(multcomp)
Error in library(multcomp) : 不存在叫‘multcomp’这个名字的程辑包

万分感谢

因为你没加载这个包呗，install.packages(multcomp)后在library(multcomp)

差了一个zoo包？我install.packages("zoo")也出现warning。
代码：
> install.packages("multcomp")
trying URL 'https://mirror.lzu.edu.cn/CRAN/bin/windows/contrib/3.4/multcomp_1.4-6.zip'
Content type 'application/zip' length 631989 bytes (617 KB)
downloaded 617 KB

package ‘multcomp’ successfully unpacked and MD5 sums checked

The downloaded binary packages are in
        C:\Users\SHCM\AppData\Local\Temp\RtmpoJPeUd\downloaded_packages
> library(multcomp)
Loading required package: TH.data
Error: package ‘MASS’ required by ‘TH.data’ could not be found
In addition: Warning message:
In read.dcf(file.path(p, "DESCRIPTION"), c("Package", "Version")) :
  cannot open compressed file 'C:/Program Files/R/R-3.4.1/library/MASS/DESCRIPTION', probable reason 'No such file or directory'