Xah Talk Show 2025-06-09 Ep665 Wolfram Language, Trig Heat Map Art

• https://youtu.be/AEf5xZ8S3bk

• Wolfram Language Tutorial
• Wolfram: Download Wolfram Engine
• Difference Between Wolfram Language, Mathematica, WolframEngine, WolframScript
• Wolfram Language Clones and Tools
• Emacs: Xah Wolfram Mode 📦
• Emacs: Xah Fly Keys 📦

• Heatmap of Trig Expressions

(* function of 2 parameters, return 1 value *)
f[x,y] = z

(* HHHH------------------------------ *)

Plot3D[
Sin[x  y],
{x, - Pi, Pi},
{y, - Pi, Pi},
PlotPoints -> 30, MaxRecursion -> 4,
ColorFunction -> GrayLevel
]

(* HHHH------------------------------ *)

DensityPlot[
Sin[x  y],
{x, - Pi, Pi},
{y, - Pi, Pi},
PlotPoints -> 30, MaxRecursion -> 4,
ColorFunction -> GrayLevel
]