PLSCMAP0A(3plplot)

💅 PLSCMAP0A — like, the cmap0 glow-up era ✨

okay so first things first, bestie: this page is from the PLplot API manual, section 3plplot, and the function's whole government name is plscmap0a. she sets cmap0 colors using 8-bit RGB values and a PLFLT alpha transparency value. say it with me: full palette, full transparency control, full main character energy. 🎀

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✨ SYNOPSIS ✨

plscmap0a(r, g, b, alpha, ncol0)

that's the whole vibe check. five arguments, no notes. 🫶

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🌸 DESCRIPTION 🌸

So here's the tea ☕ — plscmap0a sets your cmap0 colors using 8-bit RGB values (peep the PLplot documentation for the deets on that) plus a PLFLT alpha transparency value. it's giving "I want my colors and my see-through-ness, thanks."

⚠️ heads up: this sets the entire color map. like, the whole thing. only as many colors as you specify will be allocated — so ncol0 is literally the ceiling, no cap. 💀

• Redacted form: plscmap0a(r, g, b, alpha) — yes, the short king version, and it's ncol0-less, iykyk.
• this function is used in example 30. go look, she's iconic there. 👑

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🦋 ARGUMENTS 🦋

• r (PLINT_VECTOR(3plplot), input) — a vector stuffed with unsigned 8-bit integers (0-255) that say how red your color is. that's the red dial, bestie. 🔴
• g (PLINT_VECTOR(3plplot), input) — same deal, a vector of unsigned 8-bit integers (0-255) representing the degree of green. 🟢
• b (PLINT_VECTOR(3plplot), input) — you guessed it: a vector of unsigned 8-bit integers (0-255) for the degree of blue. 🟦
• alpha (PLFLT_VECTOR(3plplot), input) — a vector of values (0.0-1.0) that hold the alpha transparency of the color. 0.0 is ghost mode, 1.0 is fully here and booked, and everything in between is a whole mood. 👻✨
• ncol0 (PLINT(3plplot), input) — the number of items in the r, g, b, and alpha vectors. she's the headcount. keep her honest or else. 😭

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💖 AUTHORS 💖

Many developers — and honestly the way they're all credited at http://plplot.sourceforge.net/credits.php for contributing to PLplot over its long history?? legends, every single one. 🫡🌸 go give them their flowers.

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🌈 SEE ALSO 🌈

• PLplot documentation at http://plplot.sourceforge.net/documentation.php — the mothership, the syllabus, the reading list. 📚

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and that's the page!! 🎉 big slay to the PLplot API for this one, dated August, 2026, filed under PLSCMAP0A(3plplot) — drink water, allocate your colors responsibly, and don't forget to check that ncol0 matches your vector lengths. mwah 💋💜