Highlight epidatr readiness

docs/api/client_libraries.md

@@ -8,39 +8,39 @@ nav_order: 1
 
 For anyone looking for COVIDCast data, please visit our [COVIDCast Libraries](covidcast_clients.md).
 
-We are currently working on fully-featured Epidata clients for R and Python. They are not ready
-for release yet, but you can track our development progress and help us test them out at:
+A full-featured Epidata client for R is available at
+[epidatr](https://github.com/cmu-delphi/epidatr) and
+[also on CRAN](https://cran.r-project.org/web/packages/epidatr/index.html).
 
-* [epidatr](https://github.com/cmu-delphi/epidatr)
-* [epidatpy](https://github.com/cmu-delphi/epidatpy)
+We are currently working on a new full-featured Epidata client for Python. It is not ready
+for release yet, but you can track our development progress and help us test it out at
+[epidatpy](https://github.com/cmu-delphi/epidatpy).
 
 In the meantime, minimalist Epidata clients remain available for
-[JavaScript](https://github.com/cmu-delphi/delphi-epidata/blob/master/src/client/delphi_epidata.js),
 [Python](https://github.com/cmu-delphi/delphi-epidata/blob/master/src/client/delphi_epidata.py),
+[JavaScript](https://github.com/cmu-delphi/delphi-epidata/blob/master/src/client/delphi_epidata.js),
 and
-[R](https://github.com/cmu-delphi/delphi-epidata/blob/master/src/client/delphi_epidata.R).
+[R (legacy)](https://github.com/cmu-delphi/delphi-epidata/blob/master/src/client/delphi_epidata.R).
 The following samples show how to import the library and fetch Delphi's COVID-19
-Surveillance Streams from Facebook Survey CLI for county 06001 and days
+Surveillance Streams from Facebook Survey CLI for county 06001, and days
 `20200401` and `20200405-20200414` (11 days total).
 
-### JavaScript (in a web browser)
-
-The minimalist JavaScript client does not currently support API keys. If you need API key support in JavaScript, contact [email protected].
+### R
 
-````html
-<!-- Imports -->
-<script src="delphi_epidata.js"></script>
-<!-- Fetch data -->
-<script>
-  EpidataAsync.covidcast('fb-survey', 'smoothed_cli', 'day', 'county', [20200401, EpidataAsync.range(20200405, 20200414)], '06001').then((res) => {
-    console.log(res.result, res.message, res.epidata != null ? res.epidata.length : 0);
-  });
-</script>
+````R
+# [Optional] configure your API key, if desired
+# Interactive. See https://cmu-delphi.github.io/epidatr/articles/epidatr.html#api-keys for details.
+#save_api_key()
+# Import
+library(epidatr)
+# Fetch data
+res <- pub_covidcast('fb-survey', 'smoothed_cli', 'county', 'day', geo_values = '06001',
+                     time_values = c(20200401, 20200405:20200414))
+cat(res)
 ````
 
 ### Python
 
-
 Optionally install the [package from PyPI](https://pypi.org/project/delphi-epidata/) using pip(env):
 ````bash
 pip install delphi-epidata
@@ -60,15 +60,29 @@ res = Epidata.covidcast('fb-survey', 'smoothed_cli', 'day', 'county', [20200401,
 print(res['result'], res['message'], len(res['epidata']))
 ````
 
-### R
+### JavaScript (in a web browser)
 
+The minimalist JavaScript client does not currently support API keys. If you need API key support in JavaScript, contact [email protected].
 
-````R
+````html
+<!-- Imports -->
+<script src="delphi_epidata.js"></script>
+<!-- Fetch data -->
+<script>
+  EpidataAsync.covidcast('fb-survey', 'smoothed_cli', 'day', 'county', [20200401, EpidataAsync.range(20200405, 20200414)], '06001').then((res) => {
+    console.log(res.result, res.message, res.epidata != null ? res.epidata.length : 0);
+  });
+</script>
+````
+
+### R (legacy)
+
+```R
 # [Optional] configure your API key, if desired
 #option('epidata.auth', <your API key>)
 # Import
 source('delphi_epidata.R')
 # Fetch data
 res <- Epidata$covidcast('fb-survey', 'smoothed_cli', 'day', 'county', list(20200401, Epidata$range(20200405, 20200414)), '06001')
 cat(paste(res$result, res$message, length(res$epidata), "\n"))
-````
+```