| convertUserToLine | R Documentation | 
Convert from user coordinates to axis line
convertUserToLine(usr, axis = 1)
| usr | user coordinate to convert to line | 
| axis | axis to do conversion on (1:4 same as axis, mtext command) | 
axis line position
plot(1:10)
mtext('Test1',1,convertUserToLine(0,1))
points(5.5,0,xpd=NA)
mtext('Test2',2,convertUserToLine(0,2))
points(0,5.5,xpd=NA)
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