describe distribution of hardship values in readme

DESCRIPTION

@@ -1,6 +1,6 @@
 Package: ushardship
 Title: Hardship Index from United States Census Data
-Version: 0.0.1.020
+Version: 0.0.1.021
 Authors@R: 
     person(given = "Mark",
            family = "Padgham",

README.Rmd

@@ -59,6 +59,14 @@ https://data.cityofchicago.org/Health-Human-Services/Census-Data-Selected-socioe
 as a table of the six metrics plus their conversion to a composite hardship
 index.
 
+Note that those Chicago data are ultimately transformed into a single rank for
+each measured area, and so manifest a perfectly uniform distribution. In
+contrast, the values returned by the `hs_hardship_index()` function are not
+transformed, and so generally manifest highly skewed distributions. The
+logarithm of these values will nevertheless generally be approximately normally
+distributed. Accordingly, any statistical analyses of hardship values should
+generally be applied to log-transformed versions of the values derived here.
+
 ## Access to Census Bureau Data
 
 This package requires an API key for census.gov, which can be obtained from

README.md

@@ -37,6 +37,16 @@ Chicago](https://data.cityofchicago.org/Health-Human-Services/Census-Data-Select
 as a table of the six metrics plus their conversion to a composite
 hardship index.
 
+Note that those Chicago data are ultimately transformed into a single
+rank for each measured area, and so manifest a perfectly uniform
+distribution. In contrast, the values returned by the
+`hs_hardship_index()` function are not transformed, and so generally
+manifest highly skewed distributions. The logarithm of these values will
+nevertheless generally be approximately normally distributed.
+Accordingly, any statistical analyses of hardship values should
+generally be applied to log-transformed versions of the values derived
+here.
+
 ## Access to Census Bureau Data
 
 This package requires an API key for census.gov, which can be obtained

codemeta.json

@@ -7,7 +7,7 @@
   "codeRepository": "https://github.com/UrbanAnalyst/us-hardship-index",
   "issueTracker": "https://github.com/UrbanAnalyst/us-hardship-index/issues",
   "license": "https://spdx.org/licenses/GPL-3.0",
-  "version": "0.0.1.020",
+  "version": "0.0.1.021",
   "programmingLanguage": {
     "@type": "ComputerLanguage",
     "name": "R",