Over the past few weeks, you may have noticed that the RCS intranet has received a facelift! In addition to restructuring content, the updated page includes several new features that we hope will streamline users’ experiences. In particular, we now offer forms that allow users to:
Based on both research computing trends and recommendations from the HBS research computing environment assessment, RCS in partnership with HBS launched the Grid 2.5 last December. This new compute grid provides a number of updates and enhancements that improve compute capacity with fewer restrictions, increased work safeguards, and both GUI and command-line programs to increase research capabilities for programming, statistics, and research data management.
How could you benefit from using the compute grid?
We are often asked about how to calculate marginal effects in R, especially from Stata users who use Stata's margins and marginsplot commands after regression models. These two packages in R have similar functions to Stata's margins and marginsplot commands, which are used to calculate marginal effects after a regression model and graph them:
Natural Language Processing (NLP) assists computers with processing and understanding natural human language, such as speeches, tweets, and newspaper articles. NLP can range from counting the number of times a word appears in text to analyses that assess attitudes (e.g., positive, negative). NLP can be conducted on a variety of platforms, including the robust NLTK package in Python and several libraries in R.
For an introduction and hands-on experience using the NLTK in Python, DataCamp provides a free module as part of their NLP fundamentals course:...
Thanks again for being an early adopter of the new compute grid. As we’re about to open officially on Monday, we would like to take this opportunity to update the central R / RStudio installation for a number of reasons. We would do this work early in the day on Monday, and it would upgrade R to 3.5.1, from 3.4.2. (Note that this update would require an update/reinstall of any R packages that had been compiled.)
Greetings! We are happy to announce the opening of HBS Compute Grid 2.5, beginning Monday, Nov 19th.
Based on both research computing trends and recommendations from the HBS research computing environment assessment, Research Computing Services (RCS) has been working closely with HBS IT to make improvements to our local compute grid. This new compute grid, v2.5, provides the following updates and...
The EXPLAIN statement is a very useful tool in SQL databases to help users better understand what's going on in queries and where to apply tweaks. For example, the output of EXPLAIN can help you decide where to add indexes and can quickly remedy slow queries by telling you the join type, the possible indexes to choose vs. the index actually chosen, the estimate of rows to be examined, etc.
How do you use EXPLAIN?
Simply put the keyword EXPLAIN in front of the query to be analyzed. EXPLAIN can be used in front of a query beginning with...