Package: R.utils Class FileProgressBar
Object
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ProgressBar
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FileProgressBar
Directly known subclasses:
public static class FileProgressBar extends ProgressBar
FileProgressBar(pathname=NULL, ...)
The pathname of the output file.
Other arguments accepted by the ProgressBar
constructor.
Methods:
cleanup |
Removes the progress file for a file progress bar. | |
update |
Updates file progress bar. |
Methods inherited from ProgressBar: as.character, getBarString, increase, isDone, reset, setMaxValue, setProgress, setStepLength, setTicks, setValue, update
Methods inherited from Object: $, $<-, [[, [[<-, as.character, attach, attachLocally, clearCache, clearLookupCache, clone, detach, equals, extend, finalize, getEnvironment, getFieldModifier, getFieldModifiers, getFields, getInstantiationTime, getStaticInstance, hasField, hashCode, ll, load, names, objectSize, print, save
A progress bar that sets the size of a file accordingly. This class useful to check the progress of a batch job by just querying the size of a file, for instance, via ftp.
# NOT RUN { # } # NOT RUN { # Creates a progress bar (of length 100) that displays it self as a file. pb <- FileProgressBar(file.path(tempdir(), "progress.simulation"), max = 10L) reset(pb) while (!isDone(pb)) { x <- rnorm(3e4) increase(pb) # Emulate a slow process if (interactive()) Sys.sleep(0.1) cat(sprintf("File size: %d bytes\n", file.info(pb$pathname)$size)) Sys.sleep(0.01) } # } # NOT RUN { # }