I had similar problems too. Installing quantstrat via cmd works well for me. Here are the steps:
- Create a folder for packages i.e RPackages
- Download the file from github to that specific folder and extract the files to the library name. i.e RPackagesquantstrat
- go on command line and goto RPackages
- Type"
R CMD build quantstrat
- If it was successful, you will get a message like "building 'package_name_version_number.tar.gz'"
- Now type:
R CMD INSTALL package_name_version_number.tar.gz
Let me know if you have any other challenges.
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