Ivan Idris's Blog, page 8
May 24, 2013
Retrospective of NumPy Weather 11 to 20
After extensive research (took me almost an hour), I gleaned a couple of stylized facts (trivia) about next day temperature prediction by actual meteorological offices around the world: Ninety percent of results falling within a 2 degree error margin for … Continue reading →
May 23, 2013
Moving Average Temperature Model with Lag 1
This entry is part 20 of 20 in the series NumPy WeatherThe moving average model of a time-series represents the data as oscillations around the mean of the data. It is assumed that the lag components are white noise (not … Continue reading →
May 22, 2013
Coursera Machine Learning Week 5
This week’s lecture is again about Neural Networks. As a aside, my Firefox settings seem to not work that well with the Coursera user interface. So I switched to Safari. Now the “speed up” buttons work for me. I accelerated … Continue reading →
May 21, 2013
Review of “Cryptonomicon”
“Cryptonomicon” by Neal Stephenson was written before the Baroque Cycle trilogy and is closely related to it. However, the events in this book occur after the Baroque Cycle. A lot of the action in “Cryptonomicon” takes place in World War … Continue reading →
May 20, 2013
Day of Year Temperature Fit Take 2
This entry is part 19 of 19 in the series NumPy WeatherYeah, turns out some people didn’t like the quadratic polynomial approximation for the day of the year temperature fit. So let’s try a trigonometric function and fit again using … Continue reading →
May 19, 2013
Modeling Temperature with the SciPy leastsq function
This entry is part 18 of 18 in the series NumPy WeatherSo now we have two ideas. Either the temperature today depends on the temperature yesterday and the day before yesterday. And we assume that some kind of linear combination … Continue reading →
May 18, 2013
Weekly Standup IV
First a joke. Question: why did the Scrum chicken cross the road? Answer: it was committed to Sprint! Another old classic. What did I do? This week. Added to the NumPy Weather spike – Day of the Year Temperature Model, … Continue reading →
May 17, 2013
Day of the Year Temperature Model
This entry is part 17 of 17 in the series NumPy WeatherContinuing with the amazing work we did yesterday, I would like to propose a new model, where temperature is a function of the day of the year (between 1 … Continue reading →
May 16, 2013
Intrayear Daily Average Temperatures
This entry is part 16 of 16 in the series NumPy WeatherApologies for the title, but I couldn’t come up with anything better. We are going to have a look at the temperature variation within an year by converting dates … Continue reading →
May 15, 2013
Coursera Machine Learning Week 4
I was a bit distracted when listening to the video lectures of Coursera Machine Learning week 4. Fortunately it was a short session, so hopefully I didn’t miss much. This week’s lectures were about neural networks. Neural networks are networks … Continue reading →
