Tag Archives: R functions

Stratified random sampling in R from a data frame

By Ananda | Published: May 20, 2011

After a little bit more work, there’s a new stratified random sampling function, this one letting you sample from a data frame, returning all the variables for each of your samples as a nice data frame that you can continue working on as usual. Get the function at http://news.mrdwab.com/stratified. Usage notes in the head of [...]

Posted in Geekiness, Useless Knowledge | Also tagged , , , , | 4 Comments

Stratified Random Sampling in R–A Function in Progress

By Ananda | Published: May 15, 2011

IMPORTANT: This is here mostly to remind me of how I solved my problem. You should read Stratified random sampling in R from a data frame if you really want to use this function. I know that sampling is quite complex, and I will admit that I know very little about its complexities. Fortunately, software [...]

Posted in (all categories), Geekiness, Useless Knowledge | Also tagged , , , , , | Leave a comment

The new sample size calculator for R (already)

By Ananda | Published: September 10, 2010

aka “Maybe I shouldn’t post so quickly” Just hours ago, I posted my first set of functions for R to determine the sample size for a known population. Then, I had to update that post to reflect my newfound knowledge, and now, I thought I would update again, so that the best functions I came [...]

Posted in (all categories), Geekiness, Useless Knowledge | Also tagged , , , , | 7 Comments

A sample size calculator function for R

By Ananda | Published: September 10, 2010

IMPORTANT: This is here mostly to remind me of how I solved my problem. You should read The new sample size calculator for R (already) if you really want to use this function. In the research class at the Tata-Dhan Academy, students are currently getting into sampling, so I thought I would introduce them to [...]

Posted in (all categories), Geekiness, Useless Knowledge | Also tagged , , , | 2 Comments