{"id":2307,"date":"2018-04-04T23:10:56","date_gmt":"2018-04-04T22:10:56","guid":{"rendered":"http:\/\/pcool.dyndns.org:8080\/statsbook\/?page_id=2307"},"modified":"2025-06-28T15:58:35","modified_gmt":"2025-06-28T14:58:35","slug":"bird-migration","status":"publish","type":"page","link":"https:\/\/pcool.dyndns.org\/index.php\/bird-migration\/","title":{"rendered":"Bird Migration"},"content":{"rendered":"\n<p>&nbsp;<\/p>\n\n\n\n<p>Please refer to the this article in significance <sup class='sup-ref-note' id='note-zotero-ref-p2307-r1-o1'><a class='sup-ref-note' href='#zotero-ref-p2307-r1'>1<\/a><\/sup><\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-wp-embed is-provider-significance-magazine wp-block-embed-significance-magazine\"><div class=\"wp-block-embed__wrapper\">\n<blockquote class=\"wp-embedded-content\" data-secret=\"itvfzgwvsH\"><a href=\"https:\/\/significancemagazine.com\/graphical-interpretations-of-data-walking-the-line\/\">Graphical interpretations of data: Walking the line<\/a><\/blockquote><iframe loading=\"lazy\" class=\"wp-embedded-content\" sandbox=\"allow-scripts\" security=\"restricted\" style=\"position: absolute; visibility: hidden;\" title=\"&#8220;Graphical interpretations of data: Walking the line&#8221; &#8212; Significance magazine\" src=\"https:\/\/significancemagazine.com\/graphical-interpretations-of-data-walking-the-line\/embed\/#?secret=Kci0WlLmsb#?secret=itvfzgwvsH\" data-secret=\"itvfzgwvsH\" width=\"500\" height=\"282\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\"><\/iframe>\n<\/div><\/figure>\n\n\n\n<p>Oldest database<sup class='sup-ref-note' id='note-zotero-ref-p2307-r2-o1'><a class='sup-ref-note' href='#zotero-ref-p2307-r2'>2<\/a><\/sup><\/p>\n\n\n\n<p>Taken from website:<\/p>\n\n\n\n<p>This data set, one of the longest of its kind in the country, lists all known county first arrival dates for 32 species of migrant, 29 summer and three winter, from 1886 onwards. Dates are converted to consecutive days of the year for analysis.<\/p>\n\n\n\n<p><a href=\"https:\/\/www.lanius.org.uk\/\" target=\"_blank\" rel=\"noreferrer noopener\">https:\/\/www.lanius.org.uk\/<\/a><\/p>\n\n\n\n<p>Download R file:<\/p>\n\n\n\n<p><a href=\"https:\/\/pcool.dyndns.org:\/wp-content\/data_files\/birds.rda\" target=\"_blank\" rel=\"noreferrer noopener\">Birds<\/a><\/p>\n\n\n\n<p>To allow visualisation in R, the&nbsp;following packages should be<a href=\"https:\/\/pcool.dyndns.org\/index.php\/packages\/\" data-type=\"page\" data-id=\"22\" target=\"_blank\" rel=\"noreferrer noopener\">&nbsp;installed as described<\/a>: <\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>dplyR package<sup class='sup-ref-note' id='note-zotero-ref-p2307-r3-o1'><a class='sup-ref-note' href='#zotero-ref-p2307-r3'>3<\/a><\/sup><em>, to manipulate data frames<\/em><\/li>\n\n\n\n<li>ggplot2 package<sup class='sup-ref-note' id='note-zotero-ref-p2307-r4-o1'><a class='sup-ref-note' href='#zotero-ref-p2307-r4'>4<\/a><\/sup><em>, to create plots<\/em><\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>lubridate package<sup class='sup-ref-note' id='note-zotero-ref-p2307-r5-o1'><a class='sup-ref-note' href='#zotero-ref-p2307-r5'>5<\/a><\/sup><em>, to work with dates<\/em><\/li>\n\n\n\n<li>timeDate package<sup class='sup-ref-note' id='note-zotero-ref-p2307-r6-o1'><a class='sup-ref-note' href='#zotero-ref-p2307-r6'>6<\/a><\/sup><em>, to extract Easter dates<\/em><\/li>\n\n\n\n<li>lunar package<sup class='sup-ref-note' id='note-zotero-ref-p2307-r7-o1'><a class='sup-ref-note' href='#zotero-ref-p2307-r7'>7<\/a><\/sup><em>, another package to calculate full moon<\/em><\/li>\n\n\n\n<li>rwunderground<sup class='sup-ref-note' id='note-zotero-ref-p2307-r8-o1'><a class='sup-ref-note' href='#zotero-ref-p2307-r8'>8<\/a><\/sup>, package to download weather data*<\/li>\n\n\n\n<li>oce package<sup class='sup-ref-note' id='note-zotero-ref-p2307-r9-o1'><a class='sup-ref-note' href='#zotero-ref-p2307-r9'>9<\/a><\/sup>, <em>package with oceanographic data; including magnetism data of the earth<\/em><\/li>\n<\/ul>\n\n\n\n<p>* An API (Application Programming Interface) number is required for the rwunderground package. To obtain an API, register a free account at&nbsp;<a href=\"http:\/\/www.wunderground.com\" target=\"_blank\" rel=\"noopener\">http:\/\/www.wunderground.com<\/a>. Once registered, request a free API from&nbsp;<a href=\"https:\/\/www.wunderground.com\/weather\/api\/\" target=\"_blank\" rel=\"noopener\">https:\/\/www.wunderground.com\/weather\/api\/<\/a>&nbsp;and select the pricing tab.&nbsp;The free developer code codes allow you to download 500 API calls per day and 10 calls per minute.<\/p>\n\n\n\n<p>Latitude and longitude are used to describe a location on earth. They can be expressed in degrees, minutes and seconds (DMS notation) or in digital degrees (DD notation). In software programs, it is easiest to use the DD notation. It is however straight forward to convert from one format to the other using the following functions:<\/p>\n\n\n\n<p>R download:&nbsp;<a href=\"https:\/\/pcool.dyndns.org:\/wp-content\/R_functions\/convert_dms_dd.txt\" target=\"_blank\" rel=\"noreferrer noopener\">convert_dms_dd<\/a><\/p>\n\n\n\n<p>R download:&nbsp;<a href=\"https:\/\/pcool.dyndns.org:\/wp-content\/R_functions\/convert_dd_dms.txt\" target=\"_blank\" rel=\"noreferrer noopener\">convert_dd_dms<\/a><\/p>\n\n\n\n<p>The&nbsp;following functions should be copied and pasted into R&nbsp;and executed&nbsp;<a href=\"https:\/\/pcool.dyndns.org\/index.php\/functions\/\" data-type=\"page\" data-id=\"24\" target=\"_blank\" rel=\"noreferrer noopener\">as described<\/a>&nbsp;to convert between the different formats.<\/p>\n\n\n\n<p>&nbsp;<\/p>\n\n\n\n<p>&nbsp;<\/p>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>&nbsp; Please refer to the this article in significance Oldest database Taken from website: This data set, one of the longest of its kind in the country, lists all known county first arrival dates for 32 species of migrant, 29 summer and three winter, from 1886 onwards. Dates are converted to consecutive days of the [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"inline_featured_image":false,"footnotes":""},"class_list":["post-2307","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/pcool.dyndns.org\/index.php\/wp-json\/wp\/v2\/pages\/2307","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pcool.dyndns.org\/index.php\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/pcool.dyndns.org\/index.php\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/pcool.dyndns.org\/index.php\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/pcool.dyndns.org\/index.php\/wp-json\/wp\/v2\/comments?post=2307"}],"version-history":[{"count":9,"href":"https:\/\/pcool.dyndns.org\/index.php\/wp-json\/wp\/v2\/pages\/2307\/revisions"}],"predecessor-version":[{"id":4547,"href":"https:\/\/pcool.dyndns.org\/index.php\/wp-json\/wp\/v2\/pages\/2307\/revisions\/4547"}],"wp:attachment":[{"href":"https:\/\/pcool.dyndns.org\/index.php\/wp-json\/wp\/v2\/media?parent=2307"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}