First: excuse for my english My opinion: a useful font for measuring "popoularity" can be Google Insights for Search - http://www.google.com/insights/search/#
Every person using a software like R, SAS, SPSS needs first to learn it. So probably he make a web-search for a manual, a tutorial, a guide. One can measure the share of this kind of serach query. This kind of results can be useful to determine trends of "popularity". Example 1: "R tutorial/manual/guide", "SAS tutorial/manual/guide", "SPSS tutorial/manual/guide" http://www.google.com/insights/search/#q=%22r%20tutorial%22%2B%22r%20manual%22%2B%22r%20guide%22%2B%22r%20vignette%22%2C%22spss%20tutorial%22%2B%22spss%20manual%22%2B%22spss%20guide%22%2C%22sas%20tutorial%22%2B%22sas%20manual%22%2B%22sas%20guide%22&cmpt=q Example 2: "R software", "SAS software", "SPSS software" http://www.google.com/insights/search/#q=%22r%20software%22%2C%22spss%20software%22%2C%22sas%20software%22&cmpt=q Example 3: "R code", "SAS code", "SPSS code" http://www.google.com/insights/search/#q=%22r%20code%22%2C%22spss%20code%22%2C%22sas%20code%22&cmpt=q Example 4: "R graph", "SAS graph", "SPSS graph" http://www.google.com/insights/search/#q=%22r%20graph%22%2C%22spss%20graph%22%2C%22sas%20graph%22&cmpt=q Example 5: "R regression", "SAS regression", "SPSS regression" http://www.google.com/insights/search/#q=%22r%20regression%22%2C%22spss%20regression%22%2C%22sas%20regression%22&cmpt=q Some example are cross-software (learning needs - Example1), other can be biased by the tarditional use of that software (in SPSS usually you don't manipulate graph, i think) ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
