search for: mloshuertos

Displaying 1 result from an estimated 1 matches for "mloshuertos".

2009 Nov 05
2
Using a by() function to process several regression (lm()) functions
Hello, Thank you very much for looking at this. I have a "seasonal" user for R. I teach my undergrads and graduates students statistics using R and often find myself trying to solve problems to process student collected data in an efficient way. In this case, I have a data.frame with multiple observations. These are gas concentrations in a chamber and are used to measure into rates,