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Testing values in R

  • May 9, 2017 at 9:35 pm

    #77735

    Comments posted to this topic are about the item Testing values in R

  • May 10, 2017 at 12:08 am

    #1941924

    Good question, thanks, learned something new in R.

    ...

  • May 10, 2017 at 1:50 am

    #1941927

    Yes good question. Something new. Thanks Steve.

  • May 10, 2017 at 2:50 am

    #1941930

    Finally an R question I knew without research. Still amazed at the power of the R language to automate some data cleansing jobs we've been working through.

  • May 10, 2017 at 3:35 am

    #1941939

    Nice one, thanks Steve

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  • May 10, 2017 at 8:19 am

    #1942015

    Elementary, dear Watson. 😉

    Thanks, Steve!

  • May 10, 2017 at 9:42 am

    #1942038

    Thanks for another lesson in R-language. I was a bit confused by the title of today's QotD "Testing values in R", but I tried again something new.
    The usage of the function in the form REP() I do not recommend...😉

  • May 12, 2017 at 6:19 am

    #1942311

    George Vobr - Wednesday, May 10, 2017 9:42 AM

    Thanks for another lesson in R-language. I was a bit confused by the title of today's QotD "Testing values in R", but I tried again something new.
    The usage of the function in the form REP() I do not recommend...😉

    I agree that "REP" is an odd form.
    The  answer is  a bit  off, as rep can do a lot more than just replicate a string.  It can replicate non-string  arguments (vectors, dates, times, and more) and the "each" argument allows it to do two-dimensional replication of vectors (or component-wise one-dimensional representation if the tiimes argument is 1 and the length.out argument is NA) and I haven't yet grasped exactly what the length.out argument does when it isn't NA (haven't really tried yet).  But I guess we are all beginners in R and the tutorial that Steve pointed us to in a previous qotd introduces rep with the string replication mode, and teh answer is fair for beginners.

    Tom

  • June 7, 2017 at 9:59 am

    #1945850

    Just to point out that R is a case-sensitive language, so REP actually is not a defined function. 
    Assuming that the function was rep(x, ...), well, the correct answer would be "Replicate Elements of Vectors and Lists", replicate a single string is just a very limited example of what this powerful function does. 
    Let's try in R something like this:  rep(1:4, 4:1) 😉 or a more diabolic rep(1:9, c(0,0,0,0,0,3,0,0,0)) :blush:

  • June 7, 2017 at 11:29 am

    #1945862

    Sorry, keyword habit of capitalizing those.

    Corrected.

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