This video was mentioned on highscalability.com, so I thought I’d have a look. Knowning this stuff is useful when you’re in the business of delivering large amounts of geographical data to a large amount of clients. C10M = 10 million…
This is work in progress…
This post is very Denmark-specific. I was annoyed that downloading environmental data from the ministry of the environment was so cumbersome. Long story made short, here are download URLs for environmental data: Dataset URL Kirkebyggelinjer KIRKEBYGGELINJER_SHAPE.zip Skovbyggelinjer SKOVBYGGELINJER_SHAPE.zip Åbeskyttelseslinjer AA_BES_LINJER_SHAPE.zip…
Non-strict orders: ≤ The symbol ≤ denotes a generalization of “less than or equal”, and it defines either a partial or total ordering over a set P (in the table below a,b ∈ P): Constraint (Non-strict) partial order (Non-strict) total…
Simple. This works.
This is how I use the Mendeley system for managing my phd. Mendeley has the ability to full-text search downloaded academic papers, and features for adding notes, tags, keywords and more. The advantage is that I can quickly retrieve a…
Adapted from an article I found by Googlin’. There are many ways to define this, but simply put: Task parallelism is the simultaneous execution on multiple cores of many different functions across the same or different datasets. Data parallelism (aka…
A few days ago I found out that using the Python debugger is so easy, I can’t believe I haven’t used it before. Import the module: import pdb Set a breakpoint somewhere in your code: def some_function(self, x, y, z):…
OK, calling it a benchmark is a bit of an overstatement. It’s taking two different database libraries for a quick spin, and seeing how fast they can write a bunch of integers to disk. A second benchmark checks how fast…
In a project I’m going to use clustering algorithms implemented in Python, such as k-means. Clustering scipy.cluster has been reported to have some problems, so for now I’ll use PyCluster (following advice given on stackoverflow). Install PyCluster: pip install…