[R] graph question

[Dean Sonneborn]

I would like to produce a graph which plots a log scale variable on the 
y-axis but have the tick marks on the y-axis  be the non log transformed 
values that are round like .5, 1, 2, 3, 4 etc. Has anyone done something 
like this in the past? How did you implement it in the code?

Thanks,
Dean