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111,173 skills indexed with the new KISS metadata standard.

Showing 24 of 111,173Categories: Data & Insights, Openclaw, Coding & Debugging, Cursor-rules, General, Data
General
PromptBeginner5 minmarkdown

# Copy this file

rename it

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General
PromptBeginner5 minmarkdown

# library(lmtest) # Breusch-Pagan

Durbin-Watson etc.

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General
PromptBeginner5 minmarkdown

- `colorRamp` returns a **function** mapping [0

1] to RGB matrix.

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General
PromptBeginner5 minmarkdown

- `adjustcolor(col

alpha.f = 0.5)`: easy way to add transparency.

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General
PromptBeginner5 minmarkdown

- `hcl(h

c

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General
PromptBeginner5 minmarkdown

- `rgb(r

g

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General
PromptBeginner5 minmarkdown

- Must call `dev.off()` to finalize the file. Without it

file may be empty/corrupt.

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General
PromptBeginner5 minmarkdown

- `dev.copy(pdf

file = plot.pdf)` followed by `dev.off()` to save current plot.

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Coding & Debugging
PromptBeginner5 minmarkdown

- `arrows`: `code = 1` (head at start)

`code = 2` (head at end

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General
PromptBeginner5 minmarkdown

- `rect(xleft

ybottom

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General
PromptBeginner5 minmarkdown

- `persp(x

y

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General
PromptBeginner5 minmarkdown

- `contour(x

y

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General
PromptBeginner5 minmarkdown

- For `image`

`x` and `y` specify **cell boundaries** or **midpoints** depending on context.

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General
PromptBeginner5 minmarkdown

- Plots columns of one matrix against columns of another. Recycles `col`

`lty`

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Data
PromptBeginner5 minmarkdown

- Formula interface: `pairs(~ var1 + var2 + var3

data = df)`.

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General
PromptBeginner5 minmarkdown

- `panel` function receives `(x

y

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General
PromptBeginner5 minmarkdown

- First argument can be an **expression** in `x` or a function: `curve(sin

0

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General
PromptBeginner5 minmarkdown

- `axis(side

at

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General
PromptBeginner5 minmarkdown

- `mtext`: `line` argument positions text in margin lines (0 = adjacent to plot

positive = outward). `adj` controls horizontal position (0-1).

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General
PromptBeginner5 minmarkdown

- Read-only parameters: `cin`

`cra`

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General
PromptBeginner5 minmarkdown

- `mgp = c(3

1

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General
PromptBeginner5 minmarkdown

- `usr` with log scale: contains **log10** of the coordinate limits

not the raw values.

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General
PromptBeginner5 minmarkdown

- `las`: 0 = parallel to axis

1 = horizontal

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General
PromptBeginner5 minmarkdown

- `mai` (inches)

`mar` (lines)

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