Posts Tagged ‘ data ’

Myths of Data Science and Analytics

April 11, 2016
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Last week, I gave some brief remarks at the INFORMS New York Metro Student-Practitioner Forum (link), attended by a large group of enthusiastic students eager to enter the field of data science and analytics. (By the way, if you are at the INFORMS Analytics Conference in Orlando, come and find me. I am speaking on Ethics on Tuesday morning.) I told the students that it is not too early to…

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First ask the right question: the data scientist edition

March 31, 2016
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First ask the right question: the data scientist edition

A reader didn't like this graphic in the Wall Street Journal: One could turn every panel into a bar chart but unfortunately, the situation does not improve much. Some charts just can't be fixed by altering the visual design. The...

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dplyr workshop

March 11, 2016
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dplyr workshop code{white-space: pre;} pre:not([class]) { background-color: white; } if (window.hljs && document.readyState && document.readyState === "complete") { window.setTimeout(function() { hljs.initHighlighting(); }, 0); } ...

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The day after the shock: pollsters, forecasters scratch their heads

March 11, 2016
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Pollsters, forecasters, and the likes were embarrassed by the Bernie Sanders upset in Michigan Tuesday night. Nate Silver called it among the greatest polling error in primary history. Now, they are struggling to explain the big miss. Recall the polls conducted close to the contest showed a Clinton lead of about 20 percent points. The actual outcome was a gap of 1.5 points, with a million votes cast. This type…

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How to get fired, the data scientist edition

March 7, 2016
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Investors of Herbalife (HLF) are owed a full explanation of the metrics disaster that the management disclosed suddenly to the SEC last week. As a regulator, the SEC should be requesting much more information about what happened. (Click on the 8K filed in March 2016. Here is the LA Times article.) On Feb 25, Herbalife management held an earnings call to discuss 2015 4th quarter and full year results. Investors…

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Know your data 18: your location is our product

February 2, 2016
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In the last post in the Know Your Data series, I discussed how Uber can use its vast database of your personal trips against your personal interests. (This does not preclude the possibility that they use the data for your benefit.) It turns out that something more ominous is at foot… a number of news outlets have just published investigative reports about a company known as Vigilant Solutions (EFF, The…

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Optimism with Data

January 21, 2016
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Optimism with Data

What will our future be like? Is there no or some hope that things evolve in a good direction? Will we make progress? Data play a crucial role in answering these questions. Steven Pinker (Harvard University, Department of Psychology) in his answer to the EDGE question of 2016 considers that Quantifying Human Progress is the most interesting recent (scientific) news: ‘But … Continue reading Optimism with Data

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Treating absolute and relative data simultaneously

January 11, 2016
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Treating absolute and relative data simultaneously

A friend asked me to comment on the following chart: Specifically, he points out the challenge of trying to convey both absolute and relative metrics for a given data series. This chart presents projections of growth in the U.S. mobile...

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Know your data 17: when other people can track your Uber location

January 8, 2016
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The news is out that Uber got fined by the New York Attorney General's office for data breaches and privacy concerns. The headline writer for ZDNet nailed this one: "Uber fined peanuts in God View surveillance" (link). And the sub-lead has the kicker: "For a company with a valuation of over $50 billion, a $20,000 fine over user data protection is laughable." This settlement tells us one of the following…

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My Poster at Rocky 2015: Estimating parameters of the Hodgkin-Huxley cardiac cell model by integrating raw data from multiple types of voltage-clamp experiments

December 18, 2015
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My Poster at Rocky 2015: Estimating parameters of the Hodgkin-Huxley cardiac cell model by integrating raw data from multiple types of voltage-clamp experiments

I'm recently returned from the 2015 Rocky Mountain Bioinformatics Conference, where I presented the above poster. This is work with a colleague, Rick Gray, at the FDA. He and I collaborate on our NIH award "Optimal Design of Challenge-Response Experiments in Cardiac Electrophysiology" (HL118392) The (original) poster abstract is below, but the poster content is … Continue reading My Poster at Rocky 2015: Estimating parameters of the Hodgkin-Huxley cardiac cell…

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