Calculating mean for each column

Hi Please how do I compute the mean of each column using R of varying length ( R.length)

Thanks in advance

R = [ 0.6164 3.4161 0.9950 3.4117;

3.1654 0.4123 4.2391 1.0198;

0.5745 3.0364 1.3191 3.1129;

2.9883 0.7348 3.8730 0.4123;

0.9381 3.3749 2.0421 3.5014;

2.1817 1.0630 3.0643 0.9487];

when I compute it manually it gives me ( for each column)

1.7441

2.0063

2.5888

2.0678

Answer 1

[Torsten]

mean ( R ) ?