Hi Simon, I think the conventions of typesetting are to blame. Think of an invisible box around the text being displayed. __________________ |Left justification | |-----------------------------| meaning that the text _starts_ at the left of the field and is to the right of the text position specified __________________ | Right justification| |-----------------------------|
meaning that the text _ends_ at the right of the field and is to the left of the text position. Can't do the top and bottom justification this way, but I think you get the idea. Jim On Wed, Sep 19, 2018 at 9:13 AM Simon Dedman <simonded...@gmail.com> wrote: > > Original stack overflow post here: > https://stackoverflow.com/questions/52194719/r-graphic-text-package-adj-parameter-order-wrong-incorrect-reversed > > Hopefully this is now the appropriate place to post this as the above post > got a single comment of agreement. > > Content: > > I believe R core package graphics text function's adj parameter is > incorrectly described in the manual > <https://stat.ethz.ch/R-manual/R-devel/library/graphics/html/text.html> and > would be grateful if someone could confirm this before I submit a bug report > <https://www.r-project.org/bugs.html>. > > adj text: > > adj allows adjustment of the text with respect to (x, y). Values of 0, 0.5, > and 1 specify left/bottom, middle and right/top alignment, respectively. > > Since text controls these labels and not the points which have already been > plotted, I can't see how "with respect to x,y" can mean anything other than > "in this direction relative to their points". > > However the order is reversed: 0,0 (supposedly left & bottom) is top & > right; 1,1 (supposedly right & top) is left and bottom. > > Reproducible example: > > tens = 1:10 > plot(tens, tens, xlab = "adj 0,0 left/bottom") > text(tens, tens, labels = letters[tens], adj = c(0,0)) > plot(tens, tens, xlab = "adj 0.5,0.5 middle") > text(tens, tens, labels = letters[tens], adj = c(0.5,0.5)) > plot(tens, tens, xlab = "adj 1,1 right/top") > text(tens, tens, labels = letters[tens], adj = c(1,1)) > > Thanks. > > [[alternative HTML version deleted]] > > ______________________________________________ > R-package-devel@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-package-devel ______________________________________________ R-package-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-package-devel