Blog Archives

Scaling RServe Deployments

October 20, 2016
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Scaling RServe Deployments

Tableau runs R scripts using RServe, a free, open-source R package. But if you have a large number of users on Tableau Server and use R scripts heavily, pointing Tableau to a single RServe instance may not be sufficient. Luckily you can use a load-balancer to distribute the load across multiple RServe instances without having

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Quick Tip : RServe tricks that can make your life easier

October 18, 2016
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Quick Tip : RServe tricks that can make your life easier

RServe offers a number of configuration options that can come in handy when working with R inside Tableau but they are not captured in detail in RServe’s documentation. Let’s talk about a few. How can I start RServe with a configuration file in a custom location? RServe has a default place for the placement of

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Trump vs. Clinton in N-grams

October 4, 2016
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Trump vs. Clinton in N-grams

Presidential election campaigns are heating up and you all know what that means. Word clouds? I still remember visualizations summarizing Romney-Obama debates in 2012 but one thing that slightly bothered me back then was that almost everything I saw were just counting single words so even the one of the most memorable phrases in Obama’s

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Correspondence Analysis in Tableau with R

September 23, 2016
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Correspondence Analysis in Tableau with R

Correspondence analysis is an exploratory data analysis method for discovering relationships between two or more categorical variables. It is very often used for visualizing survey data since if the matrix is large enough (which could be due to large number of variables but also possible with small number of variables with high cardinality) visual inspection

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Quick Tip : Overlaying curves on Tableau scatter plots with R

September 11, 2016
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Quick Tip : Overlaying curves on Tableau scatter plots with R

Tableau provides a good set of trend line, reference line and band options but sometimes you want to overlay curves based on a custom equation. Logistic regression curves, sine curves, quantile regression curves…. And want these overlay curves to be smooth… This is very easy to do by taking advantage of the technique I shared

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Using your R models for in-database scoring

August 11, 2016
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Using your R models for in-database scoring

Let’s say you trained a predictive model using R integration in Tableau or your favorite R authoring environment. If your data is very large you probably used a subset of your data for training and want to see how well it will do over the entire database.Or maybe you’re satisfied with the model but you want

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Multivariate Forecasting in Tableau with R

August 2, 2016
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Multivariate Forecasting in Tableau with R

Since version 8.0 it is very easy to generate forecasts in Tableau using exponential smoothing. But in some cases you may want to enrich your forecasts with external variables. For example you may have the government’s forecast for population growth, your own hiring plans, upcoming holidays*, planned marketing activities… which could all have varying levels

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Cause & Effect : A different way to explore temporal data in Tableau with R

June 24, 2016
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Cause & Effect : A different way to explore temporal data in Tableau with R

Whether it is forecasting your quarterly sales or comparing historical data, working with time series data is big part of business analytics. Sometimes patterns are easy to see, while in others they might be elusive especially when comparing different time series with short/frequent cyclical patterns. A common question could be understanding the impact of a

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Time Series Clustering in Tableau using R

May 24, 2016
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Time Series Clustering in Tableau using R

Clustering is a very common data mining task and has a wide variety of applications from customer segmentation to grouping of text documents. K-means clustering was one of the examples I used on my blog post introducing R integration back in Tableau 8.1. Many others in Tableau community wrote similar articles explaining how different clustering

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Two new great blog posts from Tableau community

January 6, 2015
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Two new great blog posts from Tableau community

Two of my favorite new Tableau blogs are “Data * Science + R” and “Data + Science”. Former is a great resource if you want to learn how to leverage R inside Tableau by walking through sample use cases. Examples are interesting and very thoroughly explained. This year’s first post was about change-point analysis in

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