search for: puljic

...~ alcoh + drug, data=results) Error in optim(par = start, fn = loglikfun, gr = gradfun, method = method, : initial value in 'vmmin' is not finite Why is R returning me error in optim()? What should I do? In advance, thank you for advice! -- ************************** Vlatka Matkovic Puljic +32/ 485/ 453340 [[alternative HTML version deleted]]

Hi, I have dataset n1 and v1 (years). when i ask median(year) [1] NA but if i put summary of dataset n1: summary(n1) R produces median (together with min/max/mean....) why it is so? -- ************************** Vlatka Matkovic Puljic 095/8618 171 [[alternative HTML version deleted]]

...oxon signed ranks test on my data. I have pairs defined by ID and TIME variables. How can I calculate difference in variables q1, q2 in each pair? TIME ID q1 q2 1 1187 3 2 1 1706 3 3 1 1741 2 4 2 1187 3 2 2 1706 3 3 2 1741 2 4 Please, any clue! :) -- ************************** Vlatka Matkovic Puljic +32/ 485/ 453340 [[alternative HTML version deleted]]

Hi, I have numerical variable that I want to recode into categories '0' and '1 and more' and do analysis with that data. I have tried various of possibilities to do so, but I am sucked and nothing is working. recode(Q12, "0='A';1:30='B'") cut(Q12, breaks=c(0,1,30), lables=c('0', '1 and more')) cat(Q12, "0=0;1-33=1") What should

...22 6 24 6 6 7 5 12 5 12 7 12 11 12 13 12 13 12 13 12 13 12 16 12 17 12 23 12 23 12 23 12 23 12 6 13 12 13 6 14 6 15 9 15 12 15 13 15 17 16 16 17 1 18 12 18 23 18 2 19 6 19 24 19 21 22 3 25 5 26 6 27 7 27 15 29 20 30 25 31 28 31 8 32 6 33 14 33 22 34 -- ************************** Vlatka Matkovic Puljic +32/ 485/ 453340 [[alternative HTML version deleted]]