News for hackers. Stuff that matters.

A comment on Is “data scientist” the new “programmer”?. Parent comment

Re:Is “data scientist” the new “programmer”? by sampo on Tuesday September 18, 2018 @08:58PM (#18020786)
Not on my R:

    > (0.1 + 0.2) == 0.3
    [1] FALSE
[ Parent | on HN ]
Re:Is “data scientist” the new “programmer”? by darkhorn on Wednesday September 19, 2018 @11:36AM (#18024964)
The result for 0.1 + 0.2 is 0.3. https://imgur.com/xWpx1Cg

Why do you compare point to point? I have never once in my Statistics education compared point to point. You always need to see the probability of the result if it is within 2 points.

But if you want to compare use all.equal(0.1 + 0.2, 0.3)

[ Parent | on HN ]
Re:Is “data scientist” the new “programmer”? by sampo on Wednesday September 19, 2018 @03:34PM (#18027046) 

    > all.equal(0.1 + 0.2 + 0.000000003, 0.3)
    [1] TRUE
[ Parent | on HN ]