I use 2.9.0
when using the following commands with the attached lbw.txt
I can't get the plot with the regression line
Error in int_abline(a = a, b = b, h = h, v = v, untf = untf, ...) :
plot.new has not been called yet.
And a blank plot appears. ...
What is strange is that the four following lines submitted together give a regression line but I get the same error if I submit these lines step by step
Is there a solution?