Warning in grid.Call(C_textBounds, as.graphicsAnnot(x$label), x$x, x$y, : font width unknown for character 0x20
问题 I would like to use the free font Lato in ggplot2 graphs since the remainder of my R markdown document is set in this font. The font is installed on my system and available in the Font Book ( once only ). All available fonts are loaded with the extrafont package and registered in the extrafontdb . When I knit my markdown document as PDF, all text is correctly typeset in Lato . However, the plot labels of my ggPlots are not shown. I also receive the following warning message: Warning in grid