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The so-called residence time of a system is both an immensely useful and highly intuitive conception which provides a relevant timescale for processes. For example, the residence time of nutrients flowing into a pond would be the average ‘lifetime’ of the nutrients before being taking up by the pond creatures. ... [Read more...]

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Tourism competition data The tourism forecasting competition described in Athanasopoulos et al (2011) was an important investigation into domain-specific time-series forecasting; a different approach from the broader-scope “M” series forecasting co... [Read more...]

Release 0.0.2 of gettz is now on CRAN. gettz provides a possible fallback in situations where Sys.timezone() fails to determine the system timezone. That can happen when e.g. the file /etc/localtime somehow is not a link into the corresponding file w... [Read more...]

Last week, I gave an overview of bunch of tidyverse packages (tibble, dplyr, tidyr, ggplot, readr, purrr) to the Davis R-Users’ Group. Here is that talk (and since videos don’t display everywhere this blog is syndicated, here is the YouTube link). ... [Read more...]

Data Science Live Book - Scoring, Model Performance & profiling - Update! [Read more...]

Data Science Live Book - Scoring, Model Performance & profiling - Update! [Read more...]

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As more and more organizations are setting up teams of data scientists to make sense of the massive amounts of data they collect, the need grows for a standardized process for managing the work of those teams. To help with this, the data science team at Microsoft has drawn on ... [Read more...]

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One way analysis of variance helps us understand the relationship between one continuous dependent variable and one categorical independent variable. When we have one continuous dependent variable and more than one independent categorical variable we cannot use one way ANOVA. When we have two independent categorical variable we need to ... [Read more...]

The heatmaps are a tool of data visualization broadly widely used with biological data. The concept is to represent a matrix of values as colors where usually is organized by a gradient. We can find a large number of these graphics in scientific articles related with gene expressions, such as ... [Read more...]

.fusion-fullwidth-1 { padding-left: px !important; padding-right: px !important; }by Joseph Rickert Welcome to “R Views”, the new R Community blog from RStudio.... [Read more...]

Microsoft has been really increasing their development of tools in the predictive analytics and machine learning space.  Another such tool they released recently is LightGBM.  From the Github site...LightGBM is a fast, distributed, high performance gradient boosting (GBDT, GBRT, GBM or MART) framework based on decision tree algorithms, used ... [Read more...]

Probably, function paste is one of the most used function in R. The objective of this function is concatenate a series of strings. [crayon-58838298d6ebf491135746/] The arguments of the function are: [crayon-58838298d6ecf484406126/] … = The space to write the series of strings. sep = The element which separates every term. ... [Read more...]

For those of us who received statistical training outside of statistics departments, it often emphasized procedures over principles. This entailed that we learned about various statistical techniques and how to perform analysis in a particular statistical software, but glossed over the mechanisms and mathematical statistics underlying these practices. While that ... [Read more...]

The October meeting of the San Francisco Bay Area R User Group held at Santa Clara University consisted of socializing, an intro, and three speakers. In the intro, host representative Sanjiv Das highlighted the curriculum and advisory board of the school's new MS in Business Analytics program. The first speaker, ... [Read more...]

How do we know that marketing works? It was National Poetry Day in Britain recently, and I do believe that poetry and imagination, and the wisdom and insights it can bring, has a place in business and corporate world. But wisdom isn’t knowledge; it d... [Read more...]