R: replace all values in a dataframe lower than a threshold with NA

问题

I would like to replace all values in a dataframe lower than a given threshold minval with NA. What would be the most elegant way to do this?

回答1:

Try this:

 df[df<minval]=NA

df < minval creates a boolean matrix, which is used to select the values you want to replace with NA.

来源：https://stackoverflow.com/questions/26468385/r-replace-all-values-in-a-dataframe-lower-than-a-threshold-with-na