round and trailing zero
On 2024-07-29 10:06 a.m., G?ran Brostr?m wrote:
I have a "result":
> hazards
(60, 70] (70, 80] (80, 90] (90, 100] [1,] 0.046612937 0.115643783 0.273613266 0.450127975 Two issues: (i) Too many decimals, and (ii) it seems to be an 1x4 matrix, I only need the first row. (i):
> haz <- round(hazards, 3) > haz
(60, 70] (70, 80] (80, 90] (90, 100] [1,] 0.047 0.116 0.274 0.45 As expected, the fourth element lost a trailing zero. I'll deal with that, but first (ii):
> haz[1, ]
(60, 70] (70, 80] (80, 90] (90, 100]
0.047 0.116 0.274 0.450
And the trailing zero is mysteriously recovered!
Is there some general rule governing this behaviour?
R uses the same format for every element in each column when printing a matrix or dataframe, and for every element in a vector. Your first example had only one element per column. If you had printed t(haz) you'd get numbers displayed like the second version, where haz[1,] converts that row to a vector. Duncan Murdoch