search for: meanannualwaterdepth

Hello, Here is a general question that I think many of you will have insight to. I have 40 independent dataframes. Each has a dimension of 1359 x 15. For example >dim(meanAnnualWaterDepth) > 1539 15 I need to calculate the average value for each dataframe but only for columns 7: 15. I can do this with apply as follows: meanAnnualWaterDepth$Average <- apply(meanAnnualWaterDepth[7:15], 1, mean) So far so good. Next I need to generate a pairwise correlation matrix for each...