Re: [R] One-parameter fitting

2013-07-03 Thread Birdada Simret
Thank you all ;) On Wed, Jul 3, 2013 at 4:28 PM, S Ellison wrote: > > Now I have question: what about y=b fitting? is there any model to > > force or impose the ax to be zero > > Rui Barradas has answered correctly for a simple lm case. > > You can also do > lm(y~1) to obtain an estimated

Re: [R] One-parameter fitting

2013-07-03 Thread S Ellison
> Now I have question: what about y=b fitting? is there any model to > force or impose the ax to be zero Rui Barradas has answered correctly for a simple lm case. You can also do lm(y~1) to obtain an estimated mean. That formulation happens to be quite useful if you are interested in a pu

Re: [R] One-parameter fitting

2013-07-03 Thread Rui Barradas
Hello, Try ?mean abline(h = mean(y), col = "blue") Hope this helps, Rui Barradas Em 03-07-2013 15:07, Birdada Simret escreveu: Greetings to every body. we know that for linear regression: two-parameter fitting in R: (for a and b as slope and intercept) [a] for y=ax+b type models we use:

[R] One-parameter fitting

2013-07-03 Thread Birdada Simret
Greetings to every body. we know that for linear regression: two-parameter fitting in R: (for a and b as slope and intercept) [a] for y=ax+b type models we use: lm(y~x) [b] for y=axtype models we use: lm(y~0+x) => forced to pass through origin Now I have question: what about y=b fitting