Re: [R] what is scale function? Is it for variable transformation?

2006-03-05 Thread Kjetil Brinchmann Halvorsen
Kum-Hoe Hwang wrote: HOwdy I read R books about scale function for variable transformation. Acoording to this book scale function leads me to better regression results. Or am I worng? I hope somebody tell me about a scale function? Is it for variable transformation? Did you try to read

Re: [R] what is scale function? Is it for variable transformation?

2006-03-05 Thread Gabor Grothendieck
It will change the coefficients from lm and therefore their t-values but it will not change the residuals, fitted values, R-squared, F statistic, etc. For example, try this: set.seed(1) x - 1:10 y - x + rnorm(10) lm0 - lm(y ~ x) # without scale lms - lm(y ~ scale(x)) # with scale

[R] what is scale function? Is it for variable transformation?

2006-03-04 Thread Kum-Hoe Hwang
HOwdy I read R books about scale function for variable transformation. Acoording to this book scale function leads me to better regression results. Or am I worng? I hope somebody tell me about a scale function? Is it for variable transformation? -- Kum-Hoe Hwang, Phone : 82-31-250-3516Email