2244 search results for "MAP"

Probability of hypercubes…

November 28, 2009
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Probability of hypercubes…

…in R of course! There is a handy function to do those calculations. Normally (ahh!) you might resolve to a symbolic calculation package (Maple,Mathematica etc.)  but that is not the situation any more. The calculations are done with the mnormt package. Relevant functions exist in other packages as well (R : Distributions) x <- seq(-2,4,length=21) y <- 2*x+10 z

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Export Trade Clusters

November 24, 2009
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Export Trade Clusters

This post, as with the prior ones on trade clusters, aims to help visualize patterns of trade in the OECD from 50 years of partner trade statistics. The data is rich, meaning we should be able to develop rich intuition by exploring it visually. These slides follow the method laid out in Jong-Eun Lee, “Two

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Tactical asset allocation using blotter

November 18, 2009
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Tactical asset allocation using blotter

blotter is an R package that tracks the P&L of your trading systems (or simulations), even if your portfolio spans many security types and/or currencies. This post uses blotter to track a simple two-ETF trading system. The contents of this post b...

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opentick alternatives

November 5, 2009
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opentick alternatives

I've been getting a bit of traffic from people searching for opentick (the defunct company), so I've started a list of similar (but non-free) data providers. I'm not affiliated with any of these vendors, and the list is in no particular order. I'll u...

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R graphics

October 30, 2009
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R graphics

I just finished reading Paul Murrel's book, "R graphics". There are two graphical systems in R: the old ("classical" -- in the "graphics" package) one, and the new ("trellis", "lattice", "grid" -- in the "lattice" and "grid" packages) one. The first...

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Xasax closes shop

October 18, 2009
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Xasax closes shop

Six months after shutting down opentick completely Xasax (opentick's parent company) has followed suit.It looks like Xasax hit funding problems in August... Inside Market Data mentions the above in this story. Here is the full story (subscription requ...

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Factor Analysis in R

October 7, 2009
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Factor Analysis in R

This post shows an example of running a basic factor analysis in R.Additional Resources:Quick-Rpsych packageJame's Steiger's exampleFactoMineR packageThe Example:The example is based on responses by 117 university students to a 50 item version of the I...

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R Object Tooltips in ESS

October 1, 2009
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This post originally appeared on my Wordpress blog on October 1, 2009. I present it here in its original form. Whether at work or for personal projects, I use ESS a lot to perform interactive data analyses. The ability to write, edit, and su...

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R Object Tooltips in ESS

October 1, 2009
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This post originally appeared on my Wordpress blog on October 1, 2009. I present it here in its original form. Whether at work or for personal projects, I use ESS a lot to perform interactive data analyses. The ability to write, edit, and su...

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R Object Tooltips in ESS

October 1, 2009
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R Object Tooltips in ESS

Whether at work or for personal projects, I use ESS a lot to perform interactive data analyses. The ability to write, edit, and submit R commands to an interactive R process is simply something I cannot imagine analyzing data without. An example One thing that I end up having to do a lot is inspect

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