Parsing and evaluation tools that make it easy to recreate the command line behaviour of R.
Added option for the evaluate function to include timing information of ran commands. This information will be subsequently rendered by the replay. Example usage: evaluate::replay(evaluate::evaluate('Sys.sleep(1)', include_timing = TRUE))
Added a new function
flush_console() to emulate
inject_funs() function to create functions in the environment passed
envir argument of
parse_all()to allow syntactical errors in R source code when
allow_error = TRUE; this means
evaluate(stop_on_error = 0 or 1)will no longer stop on syntactical errors but returns a list of source code and the error object instead. This can be useful to show syntactical errors for pedagogical purposes.
filenameto evaluate() and parse_all() (thanks, @flying-sheep, #58).
Plots are no longer recorded when the current graphical device has been changed, which may introduce issues like yihui/knitr#824.
parse_all() can parse R code that contains multibyte characters correctly
now (#49, yihui/knitr#988)
Actually use the
Multiple expressions separated by
; on the same line can be printed as
expected when the result returned is visible, e.g. both
be printed when the source code is
x; y. In previous versions, only
is printed. (thanks, Bill Venables)
fixed yihui/knitr#600: when the last expression in the code is a comment, the previous incomplete plot was not captured
the empty plots produced by strwidth(), strheight(), and clip() are no longer recorded
evaluate() no longer records warnings in case of options(warn = -1); see yihui/knitr#610
for 'output_handler' in evaluate(), visible values from the 'value' handler will be saved to the output list; this makes it possible for users to save the original values instead of their printed side effects; this change will not affect those who use the default output handlers (#40, thanks, Gabriel Becker)
the 'value' handler in new_output_handler() may take an additional argument that means if the value is visible or not; this makes it possible to save the invisible values as well (#41, thanks, Joroen Ooms)
fixed #25: plots can be correctly recorded under a complex layout now (#25, thanks, Jack Tanner and Andy Barbour)
fixed yihui/knitr#582: evaluate() misclassified some plot changes as "par changes" and removed some plots when it should not; now it is better at identifying plot changes dur to par() (thanks, Keith Twombley)
Perspective plots from
persp() are captured now (thanks to Harvey Lime
and Yihui Xie)
If an error occurs during printing a visible value, evaluate will halt on a cryptic error "operator is invalid for atomic vectors" (#26, fixed by Yihui Xie)
If the internal connection was accidentally closed by the user, a more informative message will show up (#23)
Now the graphical device will always try to record graphics by default (when new_device = TRUE) (#34)
Some empty and incomplete plots caused by par() or layout() will be filtered out correctly for R 3.0 (#35)
output_handler argument to
evaluate. Should be a
output_handler object, which is a list of functions for handling
each type of result, prior to printing of visible return
values. This allows clients to override the console-like printing of
values, while still processing them in the correct temporal
context. The other handlers are necessary to convey the correct
ordering of the output. This essentially provides stream-based
processing, as an alternative to the existing deferred processing.
stop_on_error which controls behaviour when errors
occur. The default value,
0, acts like you've copied and pasted
the code into the console, and continues to execute all code.
will stop the code execution and return the results of evaluation up
to that point, and
2 will raise an error.
Compound expressions like
x <- 10; x are now evaluated completely.
Chinese characters on windows now work correctly (thanks to Yihui Xie)
Graphics and output interleaved correctly when generated from a loop or other compound statements
evaluate will now open a new graphics device and clean it up
afterwards. To suppress that behaviour use
new_device = FALSE
show to display S4 objects.
.Internal(eval.with.vis) with correct
test_packageto avoid problems with latest version of
stringr instead of depending on it.
Test plot recording only in the presence of interactive devices.
try_capture_stack and create_traceback do a much better job of removing infrastructure calls from the captured traceback
visible results are automatically evaluated and their outputs are captured. This is particularly important for lattice and ggplot graphics, which otherwise require special handling. It also correctly captures warnings, errors and messages raised by the print method.