HP 48gII Graphing Calculator Manual de usuario descargar pdf (Pagina 631)

100

101

Page 18-60

Here is the translation of the algorithm

to a program in User RPL language.

(See Chapter 21 for additional information on programming):

« Open program

 x y p Enter lists x and y, and p (levels 3,2,1)

« Open subprogram 1

x SIZE  n Determine size of x list

« Open subprogram 2

x VANDERMONDE Place x in stack, obtain V

IF ‘p<n-1’ THEN This IF implements step 3 in algorithm

n Place n in stack

p 2 + Calculate p+1

FOR j Start loop j = n-1, n-2, …, p+1, step = -1

j COL− DROP Remove column and drop it from stack

-1 STEP Close FOR-STEP loop

ELSE

IF ‘p>n-1’ THEN

n 1 + Calculate n+1

p 1 + Calculate p+1

FOR j Start a loop with j = n, n+1, …, p+1.

x j ^ Calculate x

, as a list

OBJ ARRY Convert list to array

j COL+ Add column to matrix

NEXT Close FOR-NEXT loop

END Ends second IF clause.

END Ends first IF clause. Its result is X

y OBJ ARRY Convert list y to an array

MTREG X and y used by program MTREG

NUM Convert to decimal format

» Close sub-program 2

» Close sub-program 1

» Close main program

Save it into a variable called POLY (POLYnomial fitting).

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HP 48gII Graphing Calculator Manual de usuario Pagina 631

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