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=={{header|J}}==
{{works with|Jsoftware|>= 9.0.1}}
{{libheader|math/calculus}}
Line 12:
ps=: 9!:11
ps 18
go=: 0.1 _1
func=: monad define
Line 18 ⟶ 19:
)
go=: 0.1 _1
shortygd =: monad define
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Revision as of 15:22, 15 January 2023
J
In earlier versions without calculus library, D. can be used instead of pderiv
load 'math/calculus'
coinsert 'jcalculus'
ps=: 9!:11
ps 18
go=: 0.1 _1
func=: monad define
'xp yp' =: y
((1-xp)*(1-xp) * ] ^-(yp)^2) + yp*(yp+2)* ] ^ _2 * xp^2
)
go=: 0.1 _1
shortygd =: monad define
go=.y
go=. go - 0.03 * func pderiv 1 ] go NB. use D. instead of pderiv for earlier versions
)
shortygd ^:_ go
- Output:
0.107626780140768125 _1.22325973233483509