R help - Aug 2010 - axis labels defaulting to scientific notation

The labels on the x-axis are defaulting to scientific notation no matter
how small cex.axis is. How can I override scientific notation to get the
labels to print out as specified? Here is the code (UNIT here is
0.0105): 

plot(xm,yv,log="xy",ylim=c(0.1,20)/UNIT,xlim=c(0.004,20)*UNIT,xaxt="n",t
ype="n")

axis(1, at=c(0.0001,0.001,0.005,0.01,0.05,0.5,0.1,1),cex.axis=0.7)

 

 

Thank you!

 

 

 

Janice P. Watkins, Biostatistician

Center for Epidemiologic Research

Oak Ridge Associated Universities

P.O. Box 117, M.S. 45

Oak Ridge, TN 37831-0117

(865)576-3395

Janice.Watkins@orau.org

 


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On 08/11/2010 06:18 AM, Watkins, Janice wrote:
> The labels on the x-axis are defaulting to scientific notation no matter
> how small cex.axis is. How can I override scientific notation to get the
> labels to print out as specified? Here is the code (UNIT here is
> 0.0105):
>
>
plot(xm,yv,log="xy",ylim=c(0.1,20)/UNIT,xlim=c(0.004,20)*UNIT,xaxt="n",t
> ype="n")
>
> axis(1, at=c(0.0001,0.001,0.005,0.01,0.05,0.5,0.1,1),cex.axis=0.7)
>
>
Hi Janice,
Have a look at the "scipen" option. This forces output format toward 
either fixed or exponential notation depending on the value. Roughly, if 
scipen is set to zero (the default), the output format will be whichever 
had the fewest characters. If you set it to a positive number:

options(scipen=3)

you will probably get the fixed notation in your plot, as the 
exponential notation will always be longer. To go the other way, set 
scipen to a negative number.

Jim