round number to a fixed interval from a vector in r

Asked Jul 09 '18 at 15:16

Active Jul 09 '18 at 15:25

Viewed 143 times

I have a vector like this:

> seq(157.5,180.5,1)
> [1] 157.5 158.5 159.5 160.5 161.5 162.5 163.5 164.5 165.5 166.5 167.5 168.5 169.5 170.5 171.5 172.5 173.5 174.5 175.5 176.5 177.5 178.5 179.5 180.5

l would like to round any decimal number within this range to the nearest number (floor) in this vector. For example:

> round(165.28)=164.5

Is there any idea how to do it?

edited Jul 09 '18 at 15:25

Jilber Urbina

58,147
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asked Jul 09 '18 at 15:16

Soheil

Sure, but I am looking for a floor one. – Soheil Jul 09 '18 at 15:24
2

Check `findInterval` – Henrik Jul 09 '18 at 15:27
As Henrik suggests, `xx[findInterval(165.28, xx)]` – IceCreamToucan Jul 09 '18 at 15:28
That works! Thanks to Henrik and Ryan. – Soheil Jul 09 '18 at 15:33
Somewhat related: [Find closest value in a vector with binary search](https://stackoverflow.com/questions/20133344/find-closest-value-in-a-vector-with-binary-search). In the accepted answer, you need to change the `roll` parameter. – Henrik Jul 09 '18 at 16:03

round number to a fixed interval from a vector in r

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