search for: chead

...h(Surv(Survival, Status) ~ a+b+c, mat) --------------------------------- This works fine. However, I need to change the code so that the column headers ( a+b+c )are passed into the coxph function on the fly. What string/object do I need to generate so the function works? I am trying: # For example chead <- "a+b+c" cmod <- coxph(Surv(Survival, Status) ~ chead, mat) but this gives an error since I'm passing in a string. Can I change chead to something so that the code works? many thanks. [[alternative HTML version deleted]]

...uair t? ? seo tr? dhearmad, t?igh i dteagmh?il leis an seolt?ir, le do thoil, agus scrios an t-?bhar as aon r?omhaire. Is ? beartas na Roinne Dl? agus Cirt, Comhionannais agus Athch?irithe Dl?, agus na nOif?g? agus na nGn?omhaireachta? a ?s?ideann seirbh?s? TF na Roinne, seoladh ?bhair chol?il a dh?chead?. M?s rud ? go measann t? gur ?bhar col?il at? san ?bhar at? sa teachtaireacht seo is ceart duit dul i dteagmh?il leis an seolt?ir l?ithreach agus le mailminder[ag]justice.ie chomh maith. ***********************************************************************************

...uair t? ? seo tr? dhearmad, t?igh i dteagmh?il leis an seolt?ir, le do thoil, agus scrios an t-?bhar as aon r?omhaire. Is ? beartas na Roinne Dl? agus Cirt, Comhionannais agus Athch?irithe Dl?, agus na nOif?g? agus na nGn?omhaireachta? a ?s?ideann seirbh?s? TF na Roinne, seoladh ?bhair chol?il a dh?chead?. M?s rud ? go measann t? gur ?bhar col?il at? san ?bhar at? sa teachtaireacht seo is ceart duit dul i dteagmh?il leis an seolt?ir l?ithreach agus le mailminder[ag]justice.ie chomh maith. ***********************************************************************************

Hi, I'm new to R, and I'm STATA user before, could you help me where I can get document about comparison command between STATA and R. Thank you very much, Best regards, -iip-

...uair t? ? seo tr? dhearmad, t?igh i dteagmh?il leis an seolt?ir, le do thoil, agus scrios an t-?bhar as aon r?omhaire. Is ? beartas na Roinne Dl? agus Cirt, Comhionannais agus Athch?irithe Dl?, agus na nOif?g? agus na nGn?omhaireachta? a ?s?ideann seirbh?s? TF na Roinne, seoladh ?bhair chol?il a dh?chead?. M?s rud ? go measann t? gur ?bhar col?il at? san ?bhar at? sa teachtaireacht seo is ceart duit dul i dteagmh?il leis an seolt?ir l?ithreach agus le mailminder[ag]justice.ie chomh maith. ***********************************************************************************

...uair t? ? seo tr? dhearmad, t?igh i dteagmh?il leis an seolt?ir, le do thoil, agus scrios an t-?bhar as aon r?omhaire. Is ? beartas na Roinne Dl? agus Cirt, Comhionannais agus Athch?irithe Dl?, agus na nOif?g? agus na nGn?omhaireachta? a ?s?ideann seirbh?s? TF na Roinne, seoladh ?bhair chol?il a dh?chead?. M?s rud ? go measann t? gur ?bhar col?il at? san ?bhar at? sa teachtaireacht seo is ceart duit dul i dteagmh?il leis an seolt?ir l?ithreach agus le mailminder[ag]justice.ie chomh maith. ***********************************************************************************

...uair t? ? seo tr? dhearmad, t?igh i dteagmh?il leis an seolt?ir, le do thoil, agus scrios an t-?bhar as aon r?omhaire. Is ? beartas na Roinne Dl? agus Cirt, Comhionannais agus Athch?irithe Dl?, agus na nOif?g? agus na nGn?omhaireachta? a ?s?ideann seirbh?s? TF na Roinne, seoladh ?bhair chol?il a dh?chead?. M?s rud ? go measann t? gur ?bhar col?il at? san ?bhar at? sa teachtaireacht seo is ceart duit dul i dteagmh?il leis an seolt?ir l?ithreach agus le mailminder[ag]justice.ie chomh maith. ***********************************************************************************

dhabby wrote: Last week I run in to a lot a problems triyng to fit an ARIMA model to a time series. The problem is that the internal process of the arima function call function "optim" to estimate the model parameters, so far so good... but my data presents a problem with the default method "BFGS" of the optim function, the output error looks like this:

...uair t? ? seo tr? dhearmad, t?igh i dteagmh?il leis an seolt?ir, le do thoil, agus scrios an t-?bhar as aon r?omhaire. Is ? beartas na Roinne Dl? agus Cirt, Comhionannais agus Athch?irithe Dl?, agus na nOif?g? agus na nGn?omhaireachta? a ?s?ideann seirbh?s? TF na Roinne, seoladh ?bhair chol?il a dh?chead?. M?s rud ? go measann t? gur ?bhar col?il at? san ?bhar at? sa teachtaireacht seo is ceart duit dul i dteagmh?il leis an seolt?ir l?ithreach agus le mailminder[ag]justice.ie chomh maith. ***********************************************************************************

HI, I'd like to perform a weighted linear least squares fit with R on data with varying errors on both vectors. I can do this with one axis using lm, but have no idea where to go from here. I've tried googling, but no idea. Any suggestions? Thanks, James

...uair t? ? seo tr? dhearmad, t?igh i dteagmh?il leis an seolt?ir, le do thoil, agus scrios an t-?bhar as aon r?omhaire. Is ? beartas na Roinne Dl? agus Cirt, Comhionannais agus Athch?irithe Dl?, agus na nOif?g? agus na nGn?omhaireachta? a ?s?ideann seirbh?s? TF na Roinne, seoladh ?bhair chol?il a dh?chead?. M?s rud ? go measann t? gur ?bhar col?il at? san ?bhar at? sa teachtaireacht seo is ceart duit dul i dteagmh?il leis an seolt?ir l?ithreach agus le mailminder[ag]justice.ie chomh maith. ***********************************************************************************

Dear List, Please find a frank interview with Phil Rack, creator of Bridge to R ( from both SAS and WPS interfaces). For those unaware of WPS- it is basically a SAS language compiler (read SAS code,writes SAS code,Reads and writes SAS datasets) ,priced at 660 $ a licence ( or estimated 10 times cheaper than Base SAS. The UK based WPC held, WPS doesnt have advanced statistical facilities like

What function and package I use to conduct ordinal regression?? My data is composed 2colums and 180rows. The first colum indicate level of mass and second colum is intensity. So, I want to calculate how much intensity are related mass. [[alternative HTML version deleted]]

Hi! I have two time series. Both measure the same thing and I would like to determine which one is noisier. Would it be a good measure of the noise in each time series the absolute lag difference? Is this a good measure? Any other measure I could use? Thanks for help :) David Riano Center for Spatial Technologies and Remote Sensing (CSTARS) University of California 250-N, The Barn One Shields

Hi list, I would like to normalize a matrix (two actually for comparison) using iterative proportional fitting. Using ipf() would be the easiest way to do this, however I can't get my head around the use of the function. More specifically, the margins settings... for a matrix: mat <- matrix(c(65,4,22,24,6,81,5,8,0,11,85,19,4,7,3,90),4,4) using fit <-

Is Pearson's Chi-Square test for contingency tables asymptotically unbiased for large tables (large degrees of freedom) regardless of the expected values in each cell? The rule of thumb is that Pearson's Chi-square should not be used when large numbers of cells have expected values < 5. However, I compared the results on 4x4 contingency tables for R's chisq.test using chi-square

Dear R experts and statisticians, I have some time series datasets, they are several years vegetation indices (about 50 data points per year) sampled from different station. These indices have similar dynamics with seasonal change. My questions are, 1) How can I compare the difference among the indices, and how can I say there is significant differnce between two time series. They

...uair t? ? seo tr? dhearmad, t?igh i dteagmh?il leis an seolt?ir, le do thoil, agus scrios an t-?bhar as aon r?omhaire. Is ? beartas na Roinne Dl? agus Cirt, Comhionannais agus Athch?irithe Dl?, agus na nOif?g? agus na nGn?omhaireachta? a ?s?ideann seirbh?s? TF na Roinne, seoladh ?bhair chol?il a dh?chead?. M?s rud ? go measann t? gur ?bhar col?il at? san ?bhar at? sa teachtaireacht seo is ceart duit dul i dteagmh?il leis an seolt?ir l?ithreach agus le mailminder[ag]justice.ie chomh maith. ***********************************************************************************

Dear list fellows, I want to study time series and use R to analyse time series of fishing data from several species (landings and cpue) investigating the correlation between them and with environmental factors (water temperature, wind, etc.). Searching at Amazon I found three books with examples in R: Time Series Analysis: With Applications in R by Jonathan D. Cryer and Jonathan D. Cryer

Hello, Anyone who knows a fast and accurate algorithm for generating draws from an underdispersed Poisson distribution. Or even better, if there is a package containing such an implementation. Thanks Rene