Frequent errors

The library does not load

After trying to load a library, you might get an error message, like this one:

R code 
> library(missing_package)
Error in library(missing_package) : 
  there is no package called ‘missing_package’

In most cases, it means one of two things:

  1. Maybe you misspelled its name which happens even to the best of us with libraries like data4PCCAR
  2. The library you want to load has not been installed yet.

To install a library, use your favorite installation method: from the “Packages” tab, with a base command like install.packages, or with a command from packages like pak or remotes.

Below we show the command using pak to install data4PCCAR:

R code 
pak::pak("HerveAbdi/data4PCCAR")

The function does not exist

You might also get this error when trying to use a function:

R code 
> missing_function()
Error in missing_function() : could not find function "missing_function"

In most cases, it means one of three (!) things:

  1. Maybe you misspelled its name
  2. The function belongs to a library that has not be loaded yet
  3. The function belongs to a library that has not been installed yet

So the first thinkg to do is to check the spelling of the function you want to use, and the second to check that you did not forget to load the library.

For example, if this missing_function belongs to missing_package, then run library(missing_package) before trying to use your favorite function.