[BUGZILLA #16948] mathematical label on y-axis is misaligned in X11()

MichaelChirico commented 4 years ago

In base graphics plot.default(), title() with the default X11() driver, if the y-axis label 'ylab' is a mathematical expression, the components of the expression are misaligned (incorrect x coordinates). Examples plot(1:2, xlab=expression(f(x)), ylab=expression(g(x)))

     plot(1:2, xlab=expression(x == f(n)), ylab=expression(y == g(n)))

Does not occur in pdf() or postscript(), only in X11()

METADATA

Bug author - Adrian Baddeley
Creation time - 2016-06-13 06:01:55 UTC
Bugzilla link
Status - NEW
Alias - None
Component - Graphics
Version - R 3.3.*
Hardware - ix86 (32-bit) Linux
Importance - P5 minor
Assignee - R-core
URL -
Modification time - 2016-06-14 20:44 UTC

MichaelChirico commented 4 years ago

I can confirm this on OSX. Looks like a top-right/bottom-left confusion with rotated character glyphs.

METADATA

Comment author - Peter Dalgaard
Timestamp - 2016-06-13 09:32:27 UTC

MichaelChirico commented 4 years ago

Happens in X11(type="Xlib") but not in X11(type="cairo")

METADATA

Comment author - Adrian Baddeley
Timestamp - 2016-06-14 00:50:26 UTC

MichaelChirico commented 4 years ago

This was a missing set of parentheses in XRotPaintAlignedString() in src/modules/X11/rotated.c

Just running some checks before committing the fix.

METADATA

Comment author - Paul Murrell
Timestamp - 2016-06-14 20:44:18 UTC

MichaelChirico / r-bugs