Use command:
new1$mean=apply(data.frame(new1),1,mean)
new1$mean=rowMeans(new1)
Generate error: rowmeans (new1): ‘x’ must be an array of at least two dimensions
Change the command to the following:
new1$mean=apply(as.data.frame(new1),1,mean)
new1$mean=rowMeans(new1)
Note that when using rows to calculate the average value, you need to convert “matrix” to “data. Frame”. You can’t directly use the
data.Frame()function, but you need to use theas.Data.Frame()function;
Recently, I want to learn that R installed an R and rstudio yesterday. After the installation, I wanted to find an exercise to deal with Excel, so I found an xlsx package and reported errors all the time, as shown in the following figure:
After a day of trouble, I still haven’t solved it. Finally, I found a solution online, so I recorded it. I hope it will be useful to other people with the same problem
Solution: execute the command on the MAC terminal: sudo ln -s $(/usr/libexec/java_home)/jre/lib/server/libjvm.dylib /usr/local/lib
Then execute in rstudio library(“xlsx”)
Referenced address: https://stackoverflow.com/questions/30738974/rjava-load-error-in-rstudio-r-after-upgrading-to-osx-yosemite
Help my younger martial sister install an R package called devtools across operating systems
Only windows and OS on crane
The situation is as follows:
You can install (Windows) on this computer
But it can’t be installed on supercomputing platform. The platform system is red hat (based on Linux)
The error given is
Installing package into ‘~:/path/’
(as ‘lib’ is unspecified)
And installation of package had non zero exit status
The solution is as follows:
The following are all implemented in
In the local (own computer installed the package) and the server’s rstudio
Operation
(.libPaths())find the package according to the path given by local rstudio. Copy the entire folder to the path of Linux platform
refresh rstudio
Implementation
library(devtools)OK
Feel that this is a universal method, welcome to exchange