https://docs.opendap.org/index.php?action=history&feed=atom&title=Server_Side_Functions_Use_Cases 2026-06-03T08:33:54Z Revision history for this page on the wiki MediaWiki 1.38.4 https://docs.opendap.org/index.php?title=Server_Side_Functions_Use_Cases&diff=1446&oldid=prev 2007-11-17T23:37:23Z

<p>New page: # use cases must illustrate that a (say) &quot;mean&quot; may be taken over a subset of the coordinate axes for a variable. The mean collapses dimensions of the original grid to produce a degenerat...</p> <p><b>New page</b></p><div># use cases must illustrate that a (say) &quot;mean&quot; may be taken over a subset of the coordinate axes for a variable. The mean collapses dimensions of the original grid to produce a degenerate grid result. E.g. an area mean of an lat-lon-time variable produces a time series.<br /> # application of this: difference time series of the same area mean from two different datasets. Requires these nested operations:<br /> ## area-average each of the variables over the same (or different) areas<br /> ## specify the vertical coordinate point on each in a geo-aware manner. (i.e. not by vertical index)<br /> ## specify the time range; regrid the time series of one variable to match the other<br /> ## take a difference between the two time series<br /> # this is an equivalent use case but on different dimensions: difference XY fields from time-averaged results<br /> ## time-average each of the variables over the same (or different) time ranges<br /> ## specify the vertical coordinate point on each in a geo-aware manner. (i.e. not by vertical index)<br /> ## specify the lat-lon range; regrid the lat-lon coordinates of one field to match the other<br /> ## take a difference between the lat-long fields</div>

RobDeAlmeida