R: String to Date or NA

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I’ve been trying to clean up a CSV file which contains some rows with dates and some not – I only want to keep the cells which do have dates so I’ve been trying to work out how to do that.

My first thought was that I’d try and find a function which would convert the contents of the cell into a date if it was in date format and NA if not. I could then filter out the NA values using the…

Week 1 of my Lean Consulting Startup

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Seven years ago, I decided I am going to have my own coaching and consulting company some day. I knew what interested me, and I knew that I was a natural ‘teacher’ (last three generations of teachers in my family was a reasonable hypothesis that I could do it!) and I will want to do it, but I was not sure of several things, most notably:
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Statistical Modelling and Analysis of Big Data

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There is a one day work­shop on this topic on 23 Feb­ru­ary 2015 at QUT in Bris­bane. I will be speak­ing on “Visu­al­iz­ing and fore­cast­ing big time series data”.

Big data is now endemic in busi­ness, indus­try, gov­ern­ment, envi­ron­men­tal man­age­ment, med­ical sci­ence, social research and so on. One of the com­men­su­rate chal­lenges…

Reading Excel Spreadsheets with Python and xlrd

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Previously, we looked at how to create Microsoft Excel (i.e. *.xls) files using the xlwt package. Today we will be looking at how we can read an *.xls/*.xlsx file using a package called xlrd. The xlrd package can be run on Linux and Mac as well as Windows. This is great when you need to process an Excel file on a Linux server.

We will start out by reading the first Excel file we created in our…

Am I a data scientist?

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Last night I gave a very short talk (less than 5 min­utes) at the Mel­bourne Ana­lyt­ics Char­ity Christ­mas Gala, a com­bined event of the Sta­tis­ti­cal Soci­ety of Aus­tralia, Data Sci­ence Mel­bourne, Big Data Ana­lyt­ics and&nbs
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Sta­tis­ti­cians seem to go through reg­u­lar peri­ods…

Agile Newspeak

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Every time and again, I go back to the “4 ways that agile is declining post” to see if it is still relevant. I don’t get disappointed.
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They are doing scrum, they’ll tell you. The top management who brought trainers and coaches before to introduce scrum, don’t understand why scrum doesn’t work. This is not a scrum-but….

Data Center Infrastructure Management (DCIM) for dummies

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Although there is a lot of buzz
around cloud computing, it will not solve the problems of all the IT companies.
One size fits all is not yet valid in
the information technology world, which is disparate and needs several
solutions to address its various problems. The traditional data centers that
operate in-house will continue to be relevant to certain types of
organizations. It is also a fact…

Big data – interpreting unstructured information

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One of the main points emphasized when describing big
data is that it processes large volumes of unstructured data. Some experts on this subject disagree with this. Log
files and click streams are not actually unstructured, according to them. They
lack clarity and have variable structures at times, they opine. It is a
different matter, however, that even if this data was structured and…

Promises You Can Trust

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JavaScript Promises provide a strong programming model for the future of JavaScript development.

So here I’m playing with promises.

First I need a bit of a package.json file: {
“name”: “promises”,
“scripts”: {
“test”: “node node_modules/mocha/bin/mocha”
“devDependencies”: {
“chai”: “^1.10.0”,
“mocha”: “^2.0.1”

Hadoop 101: An Explanation of the Hadoop Ecosystem

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Big data is taking off in 2014. More companies than ever are finding uses for it, both for managing everyday business routines and for finding solutions to complex business problems. It’s quickly moving away from it’s position as a hype word and establishing itself as a viable technology for businesses and entities both big and small.
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Internationalization using jquery.i18n.properties.js

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Internationalization refers to automatically showing localized text in your pages for users visiting your site from different regions in the world or localizing the site content based on the language preference chosen by the user.
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This article provides details about using jquery.i18n.properties.js plugin to localize the content at…

An Introduction to BDD Test Automation with Serenity and JUnit

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Serenity BDD (previously known as Thucydides) is an open source reporting library that helps you write better structured, more maintainable automated acceptance criteria, and also produces rich meaningful test reports (or “living documentation”) that not only report on the test results, but also what features have been tested.
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