Publications by Tal Galili
Google spreadsheets + google forms + R = Easily collecting and importing data for analysis
Someone on the R mailing list (link) asked: how can you easily (daily) collect data from many people into a spreadsheet and then analyse it using R. The answer people gave to it where on various ways of using excel. But excel files (at least for now), are not “on the cloud”. A better answer might be to create a google form that will upd...
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R: Backwards for loop
As easy as that. Related To leave a comment for the author, please follow the link and comment on their blog: Statistics Blog » r. R-bloggers.com offers daily e-mail updates about R news and tutorials about learning R and many other topics. Click here if you're looking to post or find an R/data-science job. Want to share your content on R-...
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R: remove all objects fromt he current workspace
Related To leave a comment for the author, please follow the link and comment on their blog: Statistics Blog » r. R-bloggers.com offers daily e-mail updates about R news and tutorials about learning R and many other topics. Click here if you're looking to post or find an R/data-science job. Want to share your content on R-bloggers? click he...
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R: Geometric mean
But this requires package heR.Misc so you might as well just use: Related To leave a comment for the author, please follow the link and comment on their blog: Statistics Blog » r. R-bloggers.com offers daily e-mail updates about R news and tutorials about learning R and many other topics. Click here if you're looking to post or find an R/dat...
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R: Add vertical line to a plot
If you have a plot open and want to add a vertical line to it: Related To leave a comment for the author, please follow the link and comment on their blog: Statistics Blog » r. R-bloggers.com offers daily e-mail updates about R news and tutorials about learning R and many other topics. Click here if you're looking to post or find an R/data-s...
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The “Future of Open Source” Survey – an R user’s thoughts and conclusions
Over a month ago, David Smith published a call for people to participate in the “Future of Open Source” Survey. 550 people (and me) took the survey, and today I got an e-mail with the news that the 2010 survey results are analysed and where published in the “Future.Of.Open.Source blog” In the following (38 slides) presentation: I would ...
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R plotting fun
Not easy to produce cool looking graphs in R, but it can be done. The results of some messing around are above. Here is the code I used: Related To leave a comment for the author, please follow the link and comment on their blog: Statistics Blog » r. R-bloggers.com offers daily e-mail updates about R news and tutorials about learning R and m...
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Quantile LOESS – Combining a moving quantile window with LOESS (R function)
In this post I will provide R code that implement’s the combination of repeated running quantile with the LOESS smoother to create a type of “quantile LOESS” (e.g: “Local Quantile Regression”). This method is useful when the need arise to fit robust and resistant (Need to be verified) a smoothed line for a quantile (an example for such...
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R-Node: a web front-end to R with Protovis
Update (April 6 – 2010) : R-Node now has it’s own a website, with a dedicated google group (you can join it here) * * * * The integration of R into online web services is (for me) one of the more exciting prospects in R’s future. That is way I was very excited coming across Jamie Love’s recent creation: R-Node. What is R-Node R-Node i...
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Correlation scatter-plot matrix for ordered-categorical data
When analyzing a questionnaire, one often wants to view the correlation between two or more Likert questionnaire item’s (for example: two ordered categorical vectors ranging from 1 to 5). When dealing with several such Likert variable’s, a clear presentation of all the pairwise relation’s between our variable can be achieved by inspecting t...
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