Print messages conditional on the verbose level

The verbose level can be represented by non-negative integers. The larger the number is, the more verbose is the program: it prints then more messages for users' information.

verbose(..., global = 1L, this = 1L)

Arguments

...: Messages to be printed, will be passed to the message function
global: Integer, the global verbose level
this: Integer, the verbose level of this message

Value

The function is used for its side effect by printing messages.

Details

This function decides whether or not to print a message, dependent on the global verbose level and the specific level of the message. If the specific level is larger than the global level, the message is suppresed; otherwise it is printed. see the details section for an example.

Suppose the global verbose level is set to 5, and two messages have levels of 1 and 7 repsectively. Since 1 suggests a low-threshold of being verbose, the first message is printed; whereas the message of level 7 is only printed when the program should run in a more verbose way (7,8,9,...{}), it is suppressed in the current global verbose level.

Author

Jitao David Zhang <jitao_david.zhang@roche.com>

Examples


Gv <- 5L
verbose("Slightly verbosing", global=Gv, this=1L)
#> Slightly verbosing
verbose("Moderately verbosing", global=Gv, this=5L)
#> Moderately verbosing
verbose("Heavily verbosing", global=Gv, this=9L)