cross platform - Read system TMP dir in R -


what cross-platform method find os temporary directory within r? use:

dirname(tempdir())

which did job both on ubuntu , windows within interactive r session. however, failed when called inside rapache. in rapache value of tempdir() /tmp, dirname(tempdir()) results in /, wrong. tried:

sys.getenv("tmp") sys.getenv("temp") sys.getenv("tmpdir")

as suggested ?"environment variables" none of these set in ubuntu. doesn't seem set in of files in /etc/r/* don't quite understand how r detects value.

the environment variables "tmpdir", "tmp", , "temp" can used modify value returned tempdir() if c variable r_tempdir isn't set (although i'm not sure how done). if want cross-platform function return path of reasonable tmp directory, , aren't interested in value of r_tempdir, use this:

gettmpdir <- function() {   tm <- sys.getenv(c('tmpdir', 'tmp', 'temp'))   d <- which(file.info(tm)$isdir & file.access(tm, 2) == 0)   if (length(d) > 0)     tm[[d[1]]]   else if (.platform$os.type == 'windows')     sys.getenv('r_user')   else     '/tmp' }

this based on function inittempdir in file src/main/sysutils.c r source distribution, translated c r.


Comments

Post a Comment

Popular posts from this blog

linux - xterm copying to CLIPBOARD using copy-selection causes automatic updating of CLIPBOARD upon mouse selection -

i've tried various ways coerce xterm (versions 285 , 292) copy selection clipboard clipboard whenever press ctrl-shift-c. promising way far has been, in ~/.xresources, put this: xterm*vt100.translations: #override \ ctrl shift <keypress> c: copy-selection(clipboard) \n\ ctrl shift <keypress> v: insert-selection(clipboard) ctrl-shift-v works perfectly, copying has nuance... if restart xterm, highlighting text puts things in primary clipboard; expected, proper, default behavior. if hit ctrl-shift-c, copies current selection clipboard clipboard. the bug, however, if highlight text after first time pressed ctrl-shift-c, you'll see highlighting copies both primary and clipboard. cannot figure out how stop xterm updating clipboard upon selection... , doesn't make sense me in first place. i said, @ specific point in time, copy selection clipboard... yet starts updating automatically upon selection after doing once... anyone have workaround...
Read more

c++ - qgraphicsview horizontal scrolling always has a vertical delta -

Image
i've subclassed qgraphicsview custom canvas used in cad application. i've reimplemented qgraphicsview::wheelevent check keyboard modifiers control key and, if control key pressed, zoom. i'm trying implement horizontal scroll when user holds shift , uses wheel. the problem i'm having horizontal scrolling always scrolls 0.279. not huge problem, hugely annoying , points else being wrong. so, here questions: is right way implement horizontal scrolling? if not, is? how eliminate delta of 0.279? thanks in advance. code , sample output below void myview::zoom(int delta) { double factor = pow(1.2, delta/abs(delta)); this->scale(factor, factor); } void myview::scrollhorizontal(int level) { qpointf center = maptoscene(viewport()->rect().center()); qdebug() << "center: " << center.x() << ", " << center.y(); centeron(qpointf(center.x() - level, center.y())); } void myview::wheelevent(qwheeleve...
Read more