[R] That dreaded floating point trap

[Alexander Engelhardt]

Am 31.03.2011 14:41, schrieb Sarah Goslee:
> On Thu, Mar 31, 2011 at 8:14 AM, Alexander Engelhardt
>> this helps, thank you.
>> But if this code is in a function, and some user supplies a vector, I will
>> still have to round it in the function, I guess.
>>
>> It's weird how 0.1 is different from round(0.1, digits=1) , but I don't want
>> to read that 90 page long floating point paper which was referenced
>> somewhere :)
>
>
> Or you could try the much shorter R FAQ 7.31. Turns out it
> isn't weird at all, if you are a computer.

You're a computer! :)

But yes.. the FAQ entry was where I found all.equal and the referenced 
90-page-paper. But I didn't find out how to do a subset with 'somevector 
 > 0.4'.

I think I'll have to round the numbers every time now.. or use some 
other not-so-pretty workaround like 'somevector > 0.4 - 0.05' for 
0.1-binned data.