to your HTML Add class="sortable" to any table you'd like to make sortable Click on the headers to sort Thanks to many, many people for contributions and suggestions. Licenced as X11: http://www.kryogenix.org/code/browser/licence.html This basically means: do what you want with it. */ var stIsIE = /*@cc_on!@*/false; sorttable = { init: function() { // quit if this function has already been called if (arguments.callee.done) return; // flag this function so we don't do the same thing twice arguments.callee.done = true; // kill the timer if (_timer) clearInterval(_timer); if (!document.createElement || !document.getElementsByTagName) return; sorttable.DATE_RE = /^(\d\d?)[\/\.-](\d\d?)[\/\.-]((\d\d)?\d\d)$/; forEach(document.getElementsByTagName('table'), function(table) { if (table.className.search(/\bsortable\b/) != -1) { sorttable.makeSortable(table); } }); }, makeSortable: function(table) { if (table.getElementsByTagName('thead').length == 0) { // table doesn't have a tHead. Since it should have, create one and // put the first table row in it. the = document.createElement('thead'); the.appendChild(table.rows[0]); table.insertBefore(the,table.firstChild); } // Safari doesn't support table.tHead, sigh if (table.tHead == null) table.tHead = table.getElementsByTagName('thead')[0]; if (table.tHead.rows.length != 1) return; // can't cope with two header rows // Sorttable v1 put rows with a class of "sortbottom" at the bottom (as // "total" rows, for example). This is B&R, since what you're supposed // to do is put them in a tfoot. So, if there are sortbottom rows, // for backwards compatibility, move them to tfoot (creating it if needed). sortbottomrows = []; for (var i=0; i
When Robert Lawson of Division of Labour (one of my favorite econ-blogs, by the way) recently participated in a marathon in Ohio, he was possessed to perform a regression analysis using data from the previous year's race, and posted the resulting formula derived from that race's data in "The Laffer Curve of Life". Using this data, Robert was able to demonstrate a positive correlation between a runner's age, gender and residency (in-state vs. out-of-state for where the marathon is held) in their average time to complete the race.
Now, ordinarily I would let this go, but Robert may have kicked off a trend in the blogosphere, since a reader of his original post was inspired enough to perform the same exercise for the 2004 Chicago Marathon. Not being one to buck a trend, if multivariate marathon regression analysis is one, Political Calculations(TM) is ready to leap in with a tool to do the math in the resulting formulas. Enter the appropriate data in the table below, and click the "Just Do It" button for the estimate of average time results:
While modeling marathon race results this way may not be the most useful of pastimes, the exercise undertaken by Robert Lawson does underscore that it's possible to analyze reams of data and to extract meaningful relationships from it. These relationships, described as mathematical formulas, may then be used to estimate results in the future or to fill in missing segments of data, should there be any. Properly done, regression analysis is a powerful tool for representing how certain individual factors may influence overall results.
Labels: none really, tool
Welcome to the blogosphere's toolchest! Here, unlike other blogs dedicated to analyzing current events, we create easy-to-use, simple tools to do the math related to them so you can get in on the action too! If you would like to learn more about these tools, or if you would like to contribute ideas to develop for this blog, please e-mail us at:
ironman at politicalcalculations
Thanks in advance!
Closing values for previous trading day.
This site is primarily powered by:
The tools on this site are built using JavaScript. If you would like to learn more, one of the best free resources on the web is available at W3Schools.com.