Re: [R] how does R compute Std. Error's?

ah yes, my mistake was dividing by sigma instead of multiplying... thank you very much sincerely, Rnewb -- View this message in context: http://n4.nabble.com/how-does-R-compute-Std-Error-s-tp1588537p1589657.html Sent from the R help mailing list archive at Nabble.com

[R] how does R compute Std. Error's?

factor. the factor is the same for all coefficients, but it is not 1, and the value varies for different data sets. what is this term? thanks, Rnewb -- View this message in context: http://n4.nabble.com/how-does-R-compute-Std-Error-s-tp1588537p1588537.html Sent from the R help mailing list a

[R] updating subset of data.frame

2 -4 -5 5 > data['z']=vec Error in `[<-.data.frame`(`*tmp*`, "z", value = c(2, -4, -5, 5)) : replacement has 4 rows, data has 10 > thanks, Rnewb -- View this message in context: http://n4.nabble.com/updating-subset-

[R] updating subset of data.frame

> vec 1 5 8 9 2 -4 -5 5 > data['z']=vec Error in `[<-.data.frame`(`*tmp*`, "z", value = c(2, -4, -5, 5)) : replacement has 4 rows, data has 10 > thanks, Rnewb -- View this message in context: http://n4.nabble.com/updating-subset-

Re: [R] re gression with multiple dependent variables?

thanks for the quick and accurate responses! cheers, Rnewb -- View this message in context: http://www.nabble.com/regression-with-multiple-dependent-variables--tp26088025p26088943.html Sent from the R help mailing list archive at Nabble.com. __ R

[R] re gression with multiple dependent variables?

bulk of the work for linear regressions is inverting a matrix that depends only on the independent variables, it seems like a waste to do it over and over for each new dependent variable. thanks, Rnewb -- View this message in context: http://www.nabble.com/regression-with-multiple-dependent

[R] linear model with coefficient constraints

accomplish this by writing code to suitably shift the coefficients after performing the basic regression above, but I'm hoping there's a better way. Is there? thanks, Rnewb -- View this message in context: http://www.nabble.com/linear-model-with-coefficient-constraints-tp25769020p25769020

Re: [R] getting variables based on name

thanks very much for the quick and accurate response! Rnewb -- View this message in context: http://www.nabble.com/getting-variables-based-on-name-tp25725837p25726184.html Sent from the R help mailing list archive at Nabble.com. __ R-help@r

[R] getting variables based on name

: data[1:3] What if i don't know that the columns that start with 'a' are columns 1-3? Is there any command that will pick out the desired columns automatically? What if i want to match a generic regular expression instead of just looking at the first letter? thanks very much,