07.qmd (767B)
1 --- 2 title: Cohort 7 3 --- 4 {{< video https://www.youtube.com/embed/Luu7JsixQgY >}} 5 <details> 6 <summary>Meeting chat log</summary> 7 ``` 8 00:43:02 Gus Lipkin: I think I found the definition for `mean` 9 An R call goes to *a which then calls the C function *b 10 *a: https://github.com/wch/r-source/blob/trunk/src/library/base/R/mean.R 11 *b: https://github.com/wch/r-source/blob/trunk/src/library/stats/src/cov.c#L207 12 It looks like the second pass only happens if `R_FINITE(mean_from_first_pass)` which tries to call `isfinite` from C++ and if it’s not there, it’ll make sure it is a number and is not positive or negative infinity. 13 00:49:55 Gus Lipkin: I feel bad for dropping in on the last chapter and getting Collin’s thanks 😅 I wish I’d joined sooner. 14 ``` 15 </details>