search for: df100

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2010 Jan 02
3
Help needed on applying a function across different data sets and aggregating the results into a single data set
...39;s take, for ex, the typical data set is: df1 <- as.data.frame(cbind(rnorm(10),rnorm(10))) names(df1)[1] <- "A" names(df1)[2] <- "B" There are many such data sets, df2,df3,... I have the names stored in a list DF <- cbind("df1","df2",...,"df100") I now need to apply the following function: a <- lsfit(df1$A,df1$B) and stack up the following results: a$coef Intercept X -0.1479750 0.2485416 So, I would end up with as many rows as there are data sets. I think sapply would be the function I should be looking for (at le...
2004 Jul 12
6
proportions confidence intervals
Dear R users this may be a simple question - but i would appreciate any thoughts does anyone know how you would get one lower and one upper confidence interval for a set of data that consists of proportions. i.e. taking a usual confidence interval for normal data would result in the lower confidence interval being negative - which is not possible given the data (which is constrained between