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Polynomial Interpolation with R

September 10, 2011
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Polynomial Interpolation with R

As a first step to produce some useable code for spline interpolation/approximation in R, I set out to first do polynomial interpolation to see how I get along. It's not that there is no spline interpolation software for R, but I find it a bit limited. splinefun, for example, can do only 1-dimensional interpolation. interp{akima} can do bicubic splines...

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Fix missing dates with R

September 2, 2011
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Fix missing dates with R

I have data on user access to a website. This log file (helpdesk log.csv) just contains the date of access, and how many accesses were counted. It would look like this:Date hits13-07-2011 214-07-2011 116-07-2011 317-07-2011 4...As you can see, for day...

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