[Rd] dput()

2020-02-28 Thread robin hankin 
My interpretation of dput.Rd is that dput() gives an exact ASCII form
of the internal representation of an R object.  But:

 rhankin@cuttlefish:~ $ R --version
R version 3.6.2 (2019-12-12) -- "Dark and Stormy Night"
Copyright (C) 2019 The R Foundation for Statistical Computing
Platform: x86_64-pc-linux-gnu (64-bit)

[snip]

rhankin@cuttlefish:~ $ R --vanilla --quiet
> x <- sum(dbinom(0:20,20,0.35))
> dput(x)
1
> x-1
[1] -4.440892e-16
>
> x==1
[1] FALSE
>

So, dput(x) gives 1, but x is not equal to 1.  Can anyone advise?

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Re: [Rd] dput()

2020-02-28 Thread Rui Barradas 

Hello,

FAQ 7.31

See also this StackOverflow post:

https://stackoverflow.com/questions/9508518/why-are-these-numbers-not-equal

Hope this helps,

Rui Barradas

Às 00:08 de 29/02/20, robin hankin escreveu:

My interpretation of dput.Rd is that dput() gives an exact ASCII form
of the internal representation of an R object.  But:

  rhankin@cuttlefish:~ $ R --version
R version 3.6.2 (2019-12-12) -- "Dark and Stormy Night"
Copyright (C) 2019 The R Foundation for Statistical Computing
Platform: x86_64-pc-linux-gnu (64-bit)

[snip]

rhankin@cuttlefish:~ $ R --vanilla --quiet

x <- sum(dbinom(0:20,20,0.35))
dput(x)

1

x-1

[1] -4.440892e-16


x==1

[1] FALSE




So, dput(x) gives 1, but x is not equal to 1.  Can anyone advise?

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