package 'keras' successfully installed, but can't be loaded? - r

Question

I tried to installed keras on win10 + Rstudio 1.2, it was successfully installed, but can't be loaded.
Have tried to uninsatll, and re-install, but the error insists.
Please advise.
> install.packages("keras")
Installing package into ‘C:/Users/eric1/Documents/R/win-library/3.5’
(as ‘lib’ is unspecified)
Warning in install.packages :
unable to access index for repository http://www.stats.ox.ac.uk/pub/RWin/bin/windows/contrib/3.5:
cannot open URL 'http://www.stats.ox.ac.uk/pub/RWin/bin/windows/contrib/3.5/PACKAGES'
trying URL 'https://mran.microsoft.com/snapshot/2018-08-01/bin/windows/contrib/3.5/keras_2.1.6.zip'
Content type 'application/zip' length 2340096 bytes (2.2 MB)
downloaded 2.2 MB
package ‘keras’ successfully unpacked and MD5 sums checked
The downloaded binary packages are in
C:\Users\eric1\AppData\Local\Temp\RtmpaynDb0\downloaded_packages
> library(keras)
Error: package or namespace load failed for ‘keras’ in rbind(info, getNamespaceInfo(env, "S3methods")):
number of columns of matrices must match (see arg 2)
and the traceback is
> traceback()
6: stop(msg, call. = FALSE, domain = NA)
5: value[[3L]](cond)
4: tryCatchOne(expr, names, parentenv, handlers[[1L]])
3: tryCatchList(expr, classes, parentenv, handlers)
2: tryCatch({
attr(package, "LibPath") <- which.lib.loc
ns <- loadNamespace(package, lib.loc)
env <- attachNamespace(ns, pos = pos, deps)
}, error = function(e) {
P <- if (!is.null(cc <- conditionCall(e)))
paste(" in", deparse(cc)[1L])
else ""
msg <- gettextf("package or namespace load failed for %s%s:\n %s",
sQuote(package), P, conditionMessage(e))
if (logical.return)
message(paste("Error:", msg), domain = NA)
else stop(msg, call. = FALSE, domain = NA)
})
1: library(keras)

Answer 1

With the hint from this post, I checked the reticulate, and got the same error message which i am sure it was good. So I decided the root was Python and Anaconda.
I reinstalled python and anaconda, and solved the issue.
Just make a note and hopefully it may help those who are as rooky as I am.
package or namespace load failed for ‘keras’ #268