How to evaluate a function in a given point

10052019, 02:54 PM
Post: #1




How to evaluate a function in a given point
Hello everyone,
I have just acquired my HP Prime, and this weekend I decided to spend some time learning how to implement some basic numeric methods on it. While doing so with Regula Falsi, despite my code is apparently correct, I am continuously being given the message 'Incorrect argument type' when running it on my device. You can find it attached below: EXPORT REGULA_FALSI() BEGIN LOCAL n,a,b,xnew,tol,N,f; N := 100; tol := .001; IF INPUT( {{f,[8]},{a,[0]},{b,[0]},{tol,[0]},{N,[0,1]}}, "Regula falsi's method", {"f(X)=", "Left guess=", "Right guess=", "Tolerance=", "Max iter.="}, { "Enter the function surrounded by single quotes", "Enter the initial left guess", "Enter the initial right guess", "Enter the tolerance", "Enter the maximum number of iterations" }, {f,a,b,tol,N} ) THEN F0 := expr(f); L1 := {}; L1(1) := a; FOR n from 2 to N+1 DO xnew := a  F0(a)*(ba)/(F0(b)F0(a)); IF F0(a)*F0(xnew) < 0 THEN b := xnew; ELSE a := xnew; END; L1(n) := xnew; IF F0(a) < tol THEN BREAK; END; END; editlist(L1); END; END; Do you have any clue about why isn't it correct? Thank you so much in a advance, and may you have a nice day. With kind regards, Aitor 

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Messages In This Thread 
How to evaluate a function in a given point  ailoher  10052019 02:54 PM
RE: How to evaluate a function in a given point  Tyann  10062019, 06:06 AM

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