Re: [R] interpreting results of regression using ordinal predictors in R

2013-01-02 Thread David Winsemius
On Jan 2, 2013, at 10:09 PM, Bert Gunter wrote: Below ... -- Bert On Wed, Jan 2, 2013 at 9:54 PM, David Winsemius > wrote: ... Search on "orthogonal polynomials". Yes, but this does not explain what these have to do with ordered factors and contrasts in a linear model. That information i

Re: [R] interpreting results of regression using ordinal predictors in R

2013-01-02 Thread Bert Gunter
Below ... -- Bert On Wed, Jan 2, 2013 at 9:54 PM, David Winsemius wrote: ... > Search on "orthogonal polynomials". > Yes, but this does not explain what these have to do with ordered factors and contrasts in a linear model. That information is contained in "An Introduction to R," the tutorial

Re: [R] interpreting results of regression using ordinal predictors in R

2013-01-02 Thread David Winsemius
On Jan 2, 2013, at 9:22 PM, Ranjan Maitra wrote: Dear friends, Being very new to this, I was wondering if I could get some pointers and guidance to interpreting the results of performing a linear regression with ordinal predictors in R. Here is a simple, toy example: y <- c(-0.11, -0.49, -1.

[R] interpreting results of regression using ordinal predictors in R

2013-01-02 Thread Ranjan Maitra
Dear friends, Being very new to this, I was wondering if I could get some pointers and guidance to interpreting the results of performing a linear regression with ordinal predictors in R. Here is a simple, toy example: y <- c(-0.11, -0.49, -1.10, 0.08, 0.31, -1.21, -0.05, -0.40, -0.01,