General
PromptBeginner5 minmarkdownQuality: 28
- Setting mfrow/mfcol resets cex to 1 and mex to 1. With 2x2 layout
base cex is multiplied by 0.83; with 3+ rows/columns
0
Explore
Find agent skills by outcome
129,145 skills indexed with the new KISS metadata standard.
Showing 24 of 129,145Categories: Creative, Data, General
General
PromptBeginner5 minmarkdownQuality: 28
- Lognormal: meanlog and sdlog are mean/sd of the log
not of the distribution itself.
0
Data
PromptBeginner5 minmarkdownQuality: 24
- Formula interface: `cor.test(~ x + y
data = df) — note the ~` with no LHS.
0
General
PromptBeginner5 minmarkdownQuality: 24
- Returns $estimate
$p.value
0
General
PromptBeginner5 minmarkdownQuality: 24
- n argument in r*() functions: if length(n) > 1
uses length(n) as the count
0
General
PromptBeginner5 minmarkdownQuality: 24
- Beta: shape1 (alpha)
shape2 (beta) — no mean/sd parameterization.
0
General
PromptBeginner5 minmarkdownQuality: 24
- names = TRUE by default
adding 0%
0
Data
PromptBeginner5 minmarkdownQuality: 28
- Default bandwidth: bw = nrd0 (Silverman's rule of thumb). For multimodal data
consider SJ or bcv.
0
General
PromptBeginner5 minmarkdownQuality: 28
- Nine type options (1-9). Default type = 7 (R default
linear interpolation). Type 1 = inverse of empirical CDF (SAS default). Types 4-9 are continuous; 1-3 are discontinuous.
0
Data
PromptBeginner5 minmarkdownQuality: 28
- Default kernel: gaussian. Range of density extends beyond data range (controlled by cut
default 3 bandwidths).
0
General
PromptBeginner5 minmarkdownQuality: 24
- method = euclidean (default). Other options: manhattan
maximum
0
General
PromptBeginner5 minmarkdownQuality: 28
- prcomp uses SVD (numerically superior); princomp uses eigen on covariance (less stable
N-1 vs N scaling).
0
Creative
PromptBeginner5 minmarkdownQuality: 24
- nstart > 1 recommended (e.g.
nstart = 25): runs algorithm from multiple random starts
0
General
PromptBeginner5 minmarkdownQuality: 24
- Methods: holm (default)
BH (Benjamini-Hochberg FDR)
0
Data
PromptBeginner5 minmarkdownQuality: 24
- Returns a matrix of p-values
not test statistics.
0
Data
PromptBeginner5 minmarkdownQuality: 28
- For composite hypotheses (parameters estimated from data)
p-values are conservative (too large). Use dgof or ks.test with exact = NULL for discrete distributions.
0
General
PromptBeginner5 minmarkdownQuality: 24
- Paired test: paired = TRUE uses signed-rank test (Wilcoxon)
not rank-sum (Mann-Whitney).
0
General
PromptBeginner5 minmarkdownQuality: 24
- For tables larger than 2x2
uses simulation (simulate.p.value = TRUE) or network algorithm.
0
General
PromptBeginner5 minmarkdownQuality: 24
- exact = TRUE by default for small samples with no ties. With ties
normal approximation used.
0
General
PromptBeginner5 minmarkdownQuality: 28
- simulate.p.value = TRUE: Monte Carlo with B = 2000 replicates (min p ~ 0.0005). Simulation assumes...
not the chi-sq assumption).
0
General
PromptBeginner5 minmarkdownQuality: 24
- Return object includes $expected
$residuals (Pearson)
0
General
PromptBeginner5 minmarkdownQuality: 28
- For goodness-of-fit: pass a vector
not a matrix. p must sum to 1 (or set rescale.p = TRUE).
0
General
PromptBeginner5 minmarkdownQuality: 28
- uniroot: finds a root of f in `[lower
upper]. Requires f(lower) and f(upper)` to have opposite signs.
0
General
PromptBeginner5 minmarkdownQuality: 24
Non-obvious behaviors
gotchas
0