Recent content by smithosaurus

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    Calculate values for all permutations of categorical variables

    Hi all, So my particular approach may be completely wrong, so let me provide a high level goal first: The data I'm working with is visitor demographic features with a score. Currently I am using 14 demographic features, each with up to 5 levels. I want determine which partition of...
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    Help with the Beta Distribtuion

    Background: I'm currently trying to learn how to use Bayesian Analysis for split testing two sets of binomial data. (Web analytics, Multi-Armed Bandit approach, etc). The Beta distribution kept coming up in this research, so Im trying to understand and apply it better. So, the best...
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    Determining the power of a 2-Sample T-Test

    So I am running a two-sample t-test , and wanted to set some preliminary accuracy goals. Ideally, I wanted to end the test when there was a statistically significant difference, using an alpha level of 1%, and power of 90%. However, this will be my first time setting a power criteria for...
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    Unique Counts and Averages over Subgroups

    Hi all, This is kinda similar to the question I had last week, but I think its a little more complicated. Basically I have two variables, and I want to perform actions in relation to unique combinations of these variables. DATE TIME PLAYER SCORE 2012/8/1 Evening BOB...
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    Column of values of unique subgroup counts...

    Hi, So I have a data frame, and I would like to add an additional column which shows the total sum of rows within the subgroups... heres a simple example grp=c("A","A","A","A","A","B","B","B","B","C","C") hour=c(1,1,1,2,2,1,1,1,2,1,1) test=data.frame(grp,hour,score) grp hour 1 A 1...