General
PromptBeginner5 minmarkdownQuality: 24
- lowess parameter is f (span
default 2/3); loess parameter is span (default 0.75).
0
Explore
Find agent skills by outcome
115,560 skills indexed with the new KISS metadata standard.
Showing 24 of 115,560Categories: General, Cursor-rules
General
PromptBeginner5 minmarkdownQuality: 24
- lowess is the older function; returns `list(x
y)` — cannot predict at new points.
0
General
PromptBeginner5 minmarkdownQuality: 24
- Direction: direction = both (default)
forward
0
General
PromptBeginner5 minmarkdownQuality: 24
- For Type III SS
use car::Anova() or set contrasts to contr.sum/contr.helmert.
0
General
PromptBeginner5 minmarkdownQuality: 24
- Quasi-families (quasibinomial
quasipoisson) allow overdispersion — no AIC is computed.
0
General
PromptBeginner5 minmarkdownQuality: 24
- binomial accepts response as: 0/1 vector
logical
0
General
PromptBeginner5 minmarkdownQuality: 28
- `anova(glm_obj
test = Chisq) for deviance-based tests; F` is invalid for non-Gaussian families.
0
General
PromptBeginner5 minmarkdownQuality: 28
- weights in glm means prior weights (not frequency weights) — for frequency weights
use the cbind trick or offset.
0
General
PromptBeginner5 minmarkdownQuality: 24
- Column names from model.matrix can be surprising: e.g.
factorLevelName concatenation.
0
General
PromptBeginner5 minmarkdownQuality: 24
- Common families: binomial(link = logit)
poisson(link = log)
0
General
PromptBeginner5 minmarkdownQuality: 28
- Default family = gaussian(link = identity) — glm() with no family silently fits OLS (same as lm
but slower and with deviance-based output).
0
General
PromptBeginner5 minmarkdownQuality: 28
- I() is required to use arithmetic operators literally: y ~ x + I(x^2). Without I()
^ means interaction crossing.
0
General
PromptBeginner5 minmarkdownQuality: 24
- terms object attributes: order (interaction order per term)
intercept
0
General
PromptBeginner5 minmarkdownQuality: 24
- Captures output from cat
0
General
PromptBeginner5 minmarkdownQuality: 24
Non-obvious behaviors
gotchas
0
General
PromptBeginner5 minmarkdownQuality: 24
- Converts character vectors to appropriate types (logical
integer
0
General
PromptBeginner5 minmarkdownQuality: 24
- as.is = TRUE (recommended): keeps characters as character
not factor.
0
General
PromptBeginner5 minmarkdownQuality: 24
- `formatC(x
format = f
0
General
PromptBeginner5 minmarkdownQuality: 24
- Assignment form: `substr(x
1
0
General
PromptBeginner5 minmarkdownQuality: 24
- `format(x
digits
0
General
PromptBeginner5 minmarkdownQuality: 24
- which = both (default)
left
0
General
PromptBeginner5 minmarkdownQuality: 24
- `substring(x
first
0
General
PromptBeginner5 minmarkdownQuality: 24
- Common mistake: unnamed arguments silently match fixed
perl
0
General
PromptBeginner5 minmarkdownQuality: 24
- Three regex modes: POSIX extended (default)
perl = TRUE
0