Top Questions

1. How to easily subset for specific data in a dataframe?
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2. How to order dates in R?
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3. Removing columns with brackets in R doesn't work
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4. Psych package error with autoR() function: Error in apply(x[1:(n.obs - lag), ], 2, sd, na.rm = na.rm): dim(X) must have a positive length
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5. R error for Psych: Error in apply(x[1:(n.obs - lag), ], 2, sd, na.rm = na.rm) : dim(X) must have a positive length
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