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I still need to do some repetitive statistical analysis on some outcomes from a dataset. Take the following as an example; id sex hiv age famsize bmi resprate 1 M Pos 23 2 16 15 2 F Neg 24 5 18 14 3 F Pos 56 14 23 24 4 F Pos 67 3 33 31 5 M Neg 34 2 21 23 I want to know if there are statistically detectable differences in all of the continuous variables in

Hello. I need calculate the median of several column of a data.frame, in a new column of this data frame, but the median operator only calculate from a vector. I have made a functionc that calculate the median but it is very slow. Are there any method in any package to calculate this? Best regards. Jose Sierra. A B C -0.01678042

Hello, my data is an ordered list of observations where each observation is either of condition "efficient" (coded as 1) or "non-efficient" (0) as e.g. No. Obs Condition 1 1.1 0 2 1.2 1 3 1.4 1 4 1.5 0 5 2.5 1 etc. My goal is to plot a single line with lty='o' but different symbols for either condition whenever condition is 1 or 0, i.e. on the x-axis the

Hi, I have a dataframe of trading dates along with the corresponding prices. I need to convert this into a time series object. How do I do this with my price values being the time series object and the dates/time being the trading dates. BR, Shubha [[alternative HTML version deleted]]

Hi All, This is surely an easy question but somehow I am not being able to get it. I am using R 2.13.2 and have a data set where variable names like this appear: pci1990, pci1991, ... , pci2009. "pci1990" has data on per capita income for 1990, "pci1991" has data on per capita income for 1991, and so on. I would like to create the logarithm of per capita for each of the

I have a dataset with 4 years of students, and normally I want to estimate things using each individual year, so I have a for loop as follows for (i in 1:4){} However, the only way I know how to calculate estimates using all four years of data is to put the estimations outside of the loop. Is there anyway to make a for loop that uses all four years at once, then uses each individual year?