Hi, I'm looking to use R to find p,d,q, P,D,Q coefficients in SARIMA (p,d,q,P,D,Q) model. However I'm new to R and am having below difficulties. (1) unable to read the data into R. while I save the .csv file into R workspace and try to load the same I run into the following error: "Error: bad restore file magic number (file may be corrupted) -- no data loaded In addition: Warning message: file 'Default.csv' has magic number '4/9/2' Use of save versions prior to 2 is deprecated". Default.csv has two columns viz. date column and numerical value column. (2) second I'm unaware of the acf and pacf functions in R which need to be used to calculate p,d,q, P,D,Q coefficients in SARIMA (p,d,q,P,D,Q) model. Would appreciate if someone could send me pointers for the same? Thanks. Regards, Rahul