[R] Formatted text output

Charles C. Berry cberry at tajo.ucsd.edu
Sun Mar 1 23:47:51 CET 2009


On Sun, 1 Mar 2009, Gregory Propf wrote:

> How does one write formatted, say "C style", output to a text file.  I 
> want something like "y=mx+b" for my linear regressions but with m and b 
> derived from the fit objects.  Also, how does one go about extracting 
> just the slope or intercept from such an object. - Greg


Following the __posting guide__ should have gotten you through this. viz.

 	??format ## leads to sprintf
 	?lm      ## See Also coef
 	?coef    ## "Extract Model Coefficients"
 	??file   ## leads to sink
 	?sink    ## "Send R Output to a File"

e.g.


> coefs <- coef( lm(rnorm(10)~I(1:10)) ) ## for example
> sprintf( "y = %5.2fx%+5.2f", coefs[2], coefs[1] )
[1] "y = -0.08x+0.50"
> sink("myFile.txt")
> sprintf( "y = %5.2fx%+5.2f", coefs[2], coefs[1] )
> sink()

Chuck


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Charles C. Berry                            (858) 534-2098
                                             Dept of Family/Preventive Medicine
E mailto:cberry at tajo.ucsd.edu	            UC San Diego
http://famprevmed.ucsd.edu/faculty/cberry/  La Jolla, San Diego 92093-0901




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