Set precision inside a function

Question

I am trying to figure out how to increase precision of an output of a function. I need to have output of acf function with at least 5 digits accuracy, while it gives me 3.

v = c(1.1,3.2,2.1,4.5) 
acfv = acf(v) 
acfv

The only precision-adjusting function I know is options(digits=...), which works only for explicit calculations in global environment. Can anybody help me?

So acf returns output with 2-digits precision and I need higher precision (e.g. 5). — Moysey Abramowitz, Jan 16 '16 at 06:23
You are mixing number of shown digits from printing results with precision of values (computer arithmetic). That are two different things. http://www.validlab.com/goldberg/paper.pdf and http://stackoverflow.com/questions/6033184/how-computer-does-floating-point-arithmetic — jogo, Jan 16 '16 at 09:51

score 1 · Accepted Answer · answered Jan 16 '16 at 07:10

1

You are just looking at the print-method output. The acf values are stored in full numeric precision:

> acfv$acf
, , 1

           [,1]
[1,]  1.0000000
[2,] -0.3399337
[3,]  0.2900897
[4,] -0.4501561

answered Jan 16 '16 at 07:10

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Set precision inside a function

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