Extends Messages, Warnings and Errors by Adding Levels and Log Files
Display an error, and record in a log file, if a condition is false
Display an error, and record it in a log file.
Display an error, and record in a log file, if a condition is true.
Checks whether the variable has names
Display a message, and record it in a log file.
Display a message, and record in a log file, if a condition is true.
Checks whether the variable is a path to an existing directory
Checks whether the variable is a path to an existing file
Checks whether all elements of one variable are in another
Checks whether the variable is NA
Checks whether the variable is a path to an existing, readable file or...
Checks whether the variable is a valid URL
Checks whether the variable is a path to an existing, writeable file o...
Extends messages, warnings and errors by adding levels and log files
Try to evaluate an expressions and capture any messages, warnings or e...
Apply a function over a vector or list, capturing any errors to displa...
Apply a function over a list of vectors, capturing any errors to displ...
Display a warning, and record it in a log file.
Display a warning, and record in a log file, if a condition is true.
Provides new functions info(), warn() and error(), similar to message(), warning() and stop() respectively. However, the new functions can have a 'level' associated with them, so that when executed the global level option determines whether they are shown or not. This allows debug modes, outputting more information. The can also output all messages to a log file.