Description Usage Arguments See Also
The sd
function from the base is replace by a new
method
in order to report the standard deviation of circular data
appropriatly. sd.default
is an alias of the original function
sd
see sd
. The behavior would be the same
for objects which are not from class
data.frame
and circular
(in the last case
the standard deviation is define as in Mardia (1972)
sqrt(-2 * ln(r))
where r
is the mean resultant length of
the data, see sd.circular
for more details). The method for
data.frame
will apply the sd
function to each columns.
1 2 3 4 5 |
x |
a numeric vector, matrix or data frame. |
na.rm |
logical. Should missing values be removed? |
... |
further arguments passed to or from other methods. |
sd
, sd.circular
, var.circular
and summary.circular
.
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