2D field visualisation

Gradient vector ▽f = (∂f/∂x, ∂f/∂y)

A z-dimension of zero is added for plotting

運算式 11: "G" Subscript, "r" "a" "d" "i" "e" "n" "t" , Baseline equals left parenthesis, 2 "a" , 2 "b" , 0 , right parenthesis

equals

left parenthesis, 2.8 , 1.6 , 0 , right parenthesis

運算式 12:

Vector field representation

運算式 14: vector left parenthesis, "P" Subscript, "o" "i" "n" "t" , Baseline , "P" Subscript, "o" "i" "n" "t" , Baseline plus "G" Subscript, "r" "a" "d" "i" "e" "n" "t" , Baseline times "S" Subscript, "i" "z" "e" , Baseline , right parenthesis

運算式 15:

Adjust arrow size

運算式 17: "S" Subscript, "i" "z" "e" , Baseline equals 0.1 9

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