Monthly Archives: October 2012

Product revenue prediction with R – part 3

October 8, 2012
By
Product revenue prediction with R – part 3

After development and improvement  of predictive model with R (as in the previous blog), I have focused here about making a prediction with the R model ( linear regression model ) and comparison with the Google prediction API model. In statistical modeling, R will calculate intercept and variable coefficients to describe the relationship between a

Read more »

Product revenue prediction with R – part 1

October 8, 2012
By
Product revenue prediction with R – part 1

In my upcoming three blogs, I am going to discuss about how Product managers, Data analyst and Data scientists can develop model for the prediction of the transactional product revenue on the basis of user actions like total numbers of time product added to the cart, total numbers of time product added to the cart,

Read more »

Two ways that correlation and stepwise regression can give different results

October 8, 2012
By

In general, a correlation test is used to test the association between two variables (y and z). However, if there is a third variable (x) that might be related to z or y, it makes...

Read more »

Summarizing Data

October 8, 2012
By
Summarizing Data

In this post, I'll go over four functions that you can use to nicely summarize your data.  Before any regression analysis, a descriptive analysis is key to understanding your variables and the relationships between them.  Next week, I'll have...

Read more »

Example 10.5: Convert a character-valued categorical variable to numeric

October 8, 2012
By
Example 10.5: Convert a character-valued categorical variable to numeric

In some settings it may be necessary to recode a categorical variable with character values into a variable with numeric values. For example, the matching macro we discussed in example 7.35 will only match on numeric variables. One way to conve...

Read more »

DIY ZeroAccess GeoIP Analysis : So What?

October 8, 2012
By
DIY ZeroAccess GeoIP Analysis : So What?

NOTE: A great deal of this post comes from @jayjacobs as he took a conversation we were having about thoughts on ways to look at the data and just ran like the Flash with it. Did you know that – if you’re a US citizen – you have approximately a 1 in 5 chance of getting the

Read more »

CrowdANALYTIX – Ideation Contest – Warranty Pricing

October 8, 2012
By

I recently completed an ideation contest on CrowdANALYTIX where the participants had to build an approach towards warranty pricing and fraud detection.Ideation contests are quite different from the usual data mining contests where the objective is...

Read more »

Functions for plotting and getting Greek in labels

October 8, 2012
By
Functions for plotting and getting Greek in labels

The problem: We often want to plot data and assign plot attributes based on characteristics of the data. For example, if we have a group of students with the following IQs, we might want to indicate who is an outlier in the statistical sense. I like...

Read more »

S&P 500 correlations up to date

October 8, 2012
By
S&P 500 correlations up to date

I haven’t heard much about correlation lately.  I was curious about what it’s been doing. Data The dataset is daily log returns on 464 large cap US stocks from the start of 2006 to 2012 October 5. The sector data were taken from Wikipedia. The correlation calculated here is the mean correlation of stocks among … Continue reading...

Read more »

GBIF biodiversity data from R – more functions

October 8, 2012
By
GBIF biodiversity data from R – more functions

We have been working on an R package to get GBIF data from R, with the stable version available through CRAN here, and the development version available on GitHub here. We had a Google Summer of code stuent work on the package this summer - you can se...

Read more »

Sponsors

Mango solutions



RStudio homepage



Zero Inflated Models and Generalized Linear Mixed Models with R

Quantide: statistical consulting and training



http://www.eoda.de







ODSC

ODSC

CRC R books series











Contact us if you wish to help support R-bloggers, and place your banner here.

Never miss an update!
Subscribe to R-bloggers to receive
e-mails with the latest R posts.
(You will not see this message again.)

Click here to close (This popup will not appear again)