<p>The R tag covers an enormous number of questions, many of which aren't really about R in general, but how to use a specific package.  There appear to have already been some grumblings about this in meta already:</p>

<p><a href="https://stats.meta.stackexchange.com/questions/693/syntax-highlighting-with-r-tag/695#695">Syntax highlighting with r tag</a></p>

<p><a href="https://stats.meta.stackexchange.com/questions/1525/should-tags-refer-to-the-answer-as-well-as-the-question">Should tags refer to the answer as well as the question?</a>(see comment)</p>

<p>As I see it there are broadly three types of R question</p>

<p><strong>Type A</strong></p>

<p>Some questions that validly fit into a general R tag:</p>

<p><a href="https://stats.stackexchange.com/questions/20523/difference-between-logit-and-probit-models">Difference between logit and probit models</a> (questioner request an R answer)</p>

<p><a href="https://stats.stackexchange.com/questions/138/resources-for-learning-r">Free resources for learning R</a></p>

<p><strong>Type B</strong></p>

<p>But other questions could be cut down to a more specific tag (as has been suggested at times, see meta examples above), for example:</p>

<p><a href="https://stats.stackexchange.com/questions/5135/interpretation-of-rs-lm-output">Interpretation of R&#39;s lm() output</a>
(could be tagged lm)</p>

<p><a href="https://stats.stackexchange.com/questions/48811/cost-function-for-validating-poisson-regression-models/48963#48963">Cost function for validating Poisson regression models</a>(Is also tagged cv.glm)</p>

<p><strong>Type C</strong></p>

<p>While others use R heavily in the question example, but don't actually need R</p>

<p><a href="https://stats.stackexchange.com/questions/26176/removal-of-statistically-significant-intercept-term-boosts-r2-in-linear-model">Removal of statistically significant intercept term increases $R^2$ in linear model</a></p>

<p><a href="https://stats.stackexchange.com/questions/20452/how-to-interpret-type-i-sequential-anova-and-manova">How to interpret type I, type II, and type III ANOVA and MANOVA?</a></p>

<p>Which questions should be tagged as R?</p>
