Re: [R] Ordering the rows of a data frame

Hi Sofia! You need to attach the data file before sorting: attach(df_final) or just use full qualified names (like df_final$Y_init) Dmitry On 03/01/2014 16:41, Stefano Sofia wrote: > Dear R users, > I have two files of seasonal rainfall data (more than 10,000 rows each); here > the first 8 ro

[R] Linear transformation of multivariate normal

Hello, Colleges! I'm having a problem with illustration of linear transformation of multivariate gaussian RV using R. According to the theory, if X ~ N(0, I), then CX ~ N(0,CC'). But the code below doesn't illustrate this. Please could you help me to find a mistake require(tmvtnorm) C = mat

Re: [R] Ordering the rows of a data frame

enentech Nonclinical Biostatistics (650) 467-7374 "Data is not information. Information is not knowledge. And knowledge is certainly not wisdom." H. Gilbert Welch On Fri, Jan 3, 2014 at 7:08 AM, Dmitry Pavlyuk wrote: Hi Sofia! You need to attach the data file before sorting: This is

Re: [R] Ordering the rows of a data frame

nd knowledge is certainly not wisdom." H. Gilbert Welch On Fri, Jan 3, 2014 at 9:21 AM, Dmitry Pavlyuk wrote: Bert, why do you think that "attach" is not working in this case? Did you check it before your advice? :) I agree about "generally bad approach", but it is qui