search for: leapyears

Given a Date object or simply a year is there an R function to tell me if the it is a leap year or not? I was hoping for something like 'is.leapyear'. I probably can build my own function (year divisible by 4 etc.) but I would rather use an existing function if it is available. Thank you. Kevin

hello, I'm working with a 4 dimensional NetCDF file, trying to calculate some summary statistics on a parameter. The dimensions are number of rows and columns, time and days. The attribute in question in this case happens to be a probability of woodstork foraging success. But it could be anything My question is whether the following code is efficient to grab the probability values ? I am

Hello, I am trying to come up with a routine to calculate a rolling mean and standard deviation for three parameters stored in a NetCDF file. The NetCDF file contains 10 years of daily records for each of the three parameters, and I need the statistics for each of the three parameters. Below I include some code illustrating what I've done so far. Obviously this approach does not get at the

In the dial plan, with GotoIf...is there a way to do a logical negation(NOT)? I want to check if the year is a leap year and the below code is how I would write the check in C. According to the wiki there isn't a logical NOT as a valid expression. From reading the asterisk/docs/README.variables, this seems to be missing. int year = 2005; if ( (year % 4 = 0) && !(year % 100 =

Hello everybody, it looks like the presense of some (do know know which) S4 methods for a given S4 class degrades the performance of xtfrm (used in 'order' in new R-devel) by a factor of millions. This is for classes that ARE derived from numeric directly and thus should be quite trivial to convert to numeric. Consider the following example: setClass("TimeDateBase",

How do I sum 15 years to my dataset? original dataset dates val 1 2001-01-12 1.2 2 2001-02-12 1.2 3 2001-03-12 1.2 result dates val 1 2016-01-12 1.2 2 2016-02-12 1.2 3 2016-03-12 1.2