Iterator. for loop or an integer with the current loop number.
Start with 1 preferibly
max.run
Number. Maximum number of loops
label
String. With additionaly information to be printed
at the end of the line. The default is run.
msg
Character. Finish message.
type
Character. Loading type style: equal, domino
start_time
POSIXct. Start time to consider. If NA, then
when first iteration starts will be set as start time. Useful
for when first iteration is showed as done but started a few
seconds/minutes ago.
multiples
Integer. Only print when multiples of N (to avoid)
wasting resources on fast and lots of iterations.