Monthly Archives: July 2012
Pic of a Bottlenose dolphin (Tursiops truncatus) breaching during cooperative hunting activity; May River, Beaufort County, South Carolina. Amazing.
From a “long” data frame with columns containing the names of measured properties and corresponding vectors of values, attempting to make a “wide” data frame with a column for each measured property. Appears as though the cast() function of the reshape … Continue reading
To store variable-length data vectors and corresponding single-value data in separate fields of the same row of an R data frame, add a new modeless column then populate it: R recognizes that the vector’s class is numeric, but it is necessary … Continue reading
Fourth and final post on coastal habitat characterization for the Northwest Atlantic: salt marshes. Provides a starting point for a more detailed narrative and application of modifiers. All factors used here are after Knox (2001) and Bertness (2007): 1) Marsh maturity young … Continue reading
After successful installation of rgdal on a Mac, trying again on an older MacBook Pro running OS X 10.5 (Leopard). Upgraded to the latest R (2.13.1), and followed all of my previous steps. But on “R CMD INSTALL…” got an … Continue reading
Apart from artificial reefs, could not find substantive information on other types of infrastructure in general texts on coastal ecology; so for this post relying on a recent review paper, and the perspectives of contributers to Sea Grant databases. Characterization … Continue reading