R Assign (or copy) column classes from a data frame to another

Question

I produced a large data frame (1700+obs,159 variables) with a function that collects info from a website. Usually, the function finds numeric values for some columns, and th

Answer 1

You could try this:

dfWrong[] <- mapply(FUN = as,dfWrong,sapply(dfCorrect,class),SIMPLIFY = FALSE)

...although my first instinct is to agree with Oliver that if it were me I'd try to ensure the correct class at the point you're reading the data.