Build new operation function in R package

Asked Dec 24 '19 at 07:34

Active Dec 24 '19 at 07:54

Viewed 44 times

I already read the tutorial about create the new package in R. I can use my custom function after clean and rebuild button in Rstudio. Now I want to create custom operation like %>% in the magrittr pacakge, so I define the function blow in the function.r, I want my + function can paste two string like python.

`+` = function(x, y){
  if( is.character(x) & is.character(y) ){
    return( paste0(x, y) )
  }else{
    `+` <- base::`+`
    return( x + y )
  }
}

When I clean and rebuild, I can not find this function in my package, also can not use this function. But it successful by using the source("function.r") to call the function. How do I create the operation function in my package like magrittr pacakge?

Here is my package folder blow: https://drive.google.com/file/d/1Jse3qamEg_wsYLrZDd-nekGbqPMi8f76/view?usp=sharing

Thanks.

edited Dec 24 '19 at 07:54

iraj jelodari

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asked Dec 24 '19 at 07:34

Hou ZeYu

2

This is a bad and inefficient approach. You should not mask + if you care about performance at all. If you absolutely have to, I'd use this approach instead: https://stackoverflow.com/a/30649288/1412059 – Roland Dec 24 '19 at 08:36
Did you export the function ? – Clemsang Dec 24 '19 at 09:32
After export in the NAMESPACE file, it work. – Hou ZeYu Dec 25 '19 at 02:49

Build new operation function in R package

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