Conditional Mean Statement Across Dataframe

The following code will return the average conditioned that the months are greater than 6.

mean(df[df$delta1>6, "delta1"], na.rm=T)  

Now, how do I do apply this for every column in the dataframe?

df:

delta1      delta2      delta3  NA          2           3  4           NA          6  7           8           NA  10          NA          12  NA          14          15  16          NA          18  19          20          NA  

https://stackoverflow.com/questions/66486484/conditional-mean-statement-across-dataframe March 05, 2021 at 11:48AM