[Dplr-commits] r788 - in pkg/dplR: . vignettes

[noreply at r-forge.r-project.org]

Author: andybunn
Date: 2014-04-08 17:30:28 +0200 (Tue, 08 Apr 2014)
New Revision: 788

Modified:
   pkg/dplR/TODO
   pkg/dplR/vignettes/intro-dplR.Rnw
Log:
Edited the vignette section on indexing to make more sense. I hope.

Modified: pkg/dplR/TODO
===================================================================
--- pkg/dplR/TODO	2014-04-08 15:06:21 UTC (rev 787)
+++ pkg/dplR/TODO	2014-04-08 15:30:28 UTC (rev 788)
@@ -42,8 +42,3 @@
     y <- ar.func(y)
     return(y)
 
-o [andybunn] Clarify "each series has a mean of one" in the vignette.
-  Expected value (probability and statistics) vs. arithmetic mean of a
-  discrete set of numbers.  This is of the first kind.  Andy: as a
-  native English speaker, I'm sure you can formulate this better.
-

Modified: pkg/dplR/vignettes/intro-dplR.Rnw
===================================================================
--- pkg/dplR/vignettes/intro-dplR.Rnw	2014-04-08 15:06:21 UTC (rev 787)
+++ pkg/dplR/vignettes/intro-dplR.Rnw	2014-04-08 15:30:28 UTC (rev 788)
@@ -114,9 +114,12 @@
 
 A rwi object has the same basic properties as the rwl object from which it is 
 made. I.e., it has the same number of rows and columns, the same names, and so 
-on. The difference is that each series has a mean of one (each series is 
-indexed). As read.rwl is the primary function for getting data into R, detrend
-is the primary function for standardizing rwl objects.
+on. The difference is that each series has been standardized by dividing the
+ringwidths against a growth model (e.g., a stiff spline, a negative 
+expontential, etc.). This give each series a mean of one (thus referred to 
+as ``indexed'') and allows a chronology to be built (next section). As read.rwl 
+is the primary function for getting data into R, detrend is the primary 
+function for standardizing rwl objects (but see cms, rcs, as well).
 
 \subsection{Common Detrending Methods}
 As any dendrochronologist will tell you, detrending is a dark art. In dplR we