Convert device position (inch) to coordinates in current plot region.
inch2coords(xpos, ypos = NULL, simplify = FALSE)x position in device, inches between position and left side of device. When defined as two-number vector, x- and y-position as measured from bottomleft corner of device.
y position (in inches) from bottom of device.
Logical: whether or not to output a vector instead of a list.
list or 2-number vector
Other Utility functions: 
findAbsMin(),
find_n_neighbors(),
firstLetterCap(),
getArrowPos(),
getDec(),
getRange(),
getRatioCoords(),
get_palette(),
group_sort(),
isColor(),
list2str(),
move_n_point(),
orderBoxplot(),
se(),
sortGroups()