Re: [R] About logistic regression

2010-04-01 Thread David Winsemius
On Apr 1, 2010, at 8:19 AM, Silvano wrote: Hi, I have a dichotomous variable (Q1) whose answers are Yes or No. Also I have 2 categorical explanatory variables (V1 and V2) with two levels each. I used logistic regression to determine whether there is an effect of V1, V2 or an interaction

Re: [R] About logistic regression

2010-04-01 Thread Eik Vettorazzi
Hi Silvano, this is FAQ 7.17 http://cran.r-project.org/doc/FAQ/R-FAQ.html#Why-does-the-output-from-anova_0028_0029-depend-on-the-order-of-factors-in-the-model_003f hth. Silvano schrieb: Hi, I have a dichotomous variable (Q1) whose answers are Yes or No. Also I have 2 categorical explanatory

[R] About logistic regression

2010-04-01 Thread Silvano
Hi, I have a dichotomous variable (Q1) whose answers are Yes or No. Also I have 2 categorical explanatory variables (V1 and V2) with two levels each. I used logistic regression to determine whether there is an effect of V1, V2 or an interaction between them. I used the R and SAS, just for