Standard Deviation in IDL
The built in IDL standard deviation function in IDL, STDDEV, uses the moment function which treats the standard deviation as a sample, rather than a population. A short programme can give us both options.
Standard Deviation of Noise in TV Viewing Figures
As discussed in my last post we found that ‘the standard deviation of the noise in viewers is about 20% of the range of viewers’ for Grey’s Anatomy. I wanted to see if a similar figure was true for other TV shows.
Graphical Analysis of Grey’s Anatomy Viewing Figures
I recently started watching Grey’s Anatomy which I’ve been enjoying. However a friend of mine told me that the later episodes are not as good. So I thought I would have a look if the viewing figures reflected this.
Google Map Maker UK
Since last Thursday Google’s excellent Map Maker has been made available for UK users.
Inactive Account Manager
Are you leaving a digital will? On Thursday Google announced a new feature called ‘Inactive Account Manager‘, described first in the Google Public Policy Blog.
Newton’s Method for Solving the Inverse Geodesic Problem in IDL
There are a number of approaches to solve the inverse geodesic problem, this post provides the IDL code to use Newton’s method as described by Karney (2012) in ‘Algorithms for geodesics‘.
Velocity Required for Loop the Loop
Chris (@chris2306) got asked how fast you would need to be going to complete a loop the loop. This is what we got.
Extreme Space Weather Events
After months of hard work the Royal Academy of Engineering have published their report on the impact of extreme space weather events in the UK – the media have reported on it with varying success…
Largest Known Prime Number
We have a new largest known prime number! So here is an obligatory post about prime numbers.
It’s Snowing Outside!
I’m sitting in my office, at home, watching the snow falling outside and it got me thinking….