[R] numerical values in expressions

Stephan Lorenzen stephlo at ku.edu
Mon Mar 20 07:43:27 CET 2006

Hi there, 

I fitted a curve to some data and want to write the equation of the
fitted curve in the figure legend. If I write 

paste(format(fitZ$estimate[1], digits=2), "e^", format(fitZ$estimate[2],
digits=2), "x +", format(fitZ$estimate[3], digits=2))

i get unformatted output, writing "e^-0.0039x" instead of superposing
the exponent. I tried several variants of "expression", but finally only
the explicit one 

expression(0.061 * e^"-0.0039x" + 0.010)

where I have to provide the values myself worked. Is there any way to
use the "expression" function to reference actual values of variables
instead of just outputting their names?



More information about the R-help mailing list