[R] mathematical expressions ...

[allan_sta_staff_sci_main_uct@mail.uct.ac.za]

hi all

i have a few questions about formatting plots:

1. i would like to add a symbol such as chi squared with 3 degrees of freedom
onto a plot.    expression(chi^2 == jnfdjb), can be used in conjuction with
"legend" to solve this but how does one include an under score for the degrees
of freedom

2. on the y axis: how does one change the orientation of the label from vertical
to horisontal

3. can one add dots (not lines) to a barplot (ie : inside each of the bars)


sorry if the questions are too simple