need an if, if_else, or for statement to replace unwanted numbers in data.frame [duplicate]

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• Replace negative values by zero 3 answers

Using R, what ifelse, if_else, if, for, or other statements should be used on a data.frame to find the negative numbers and replace them with the positive number 0.001? Said another way, replace all negative numbers in the data.frame with the positive number 0.001. A base R, plyr or dplyr function would work.

set.seed(1)

dfTest <- data.frame(replicate(5, sample(c(-10:99), 7, rep = TRUE)))

In MS-Excel, the code might be =if(x<0, 0.001, x). There are several R examples for lists, just not many applicable for data.frames. Thanks.