Integral in solve on HP 42S?
02-26-2019, 09:29 AM
Post: #13
 Gerald H Senior Member Posts: 1,441 Joined: May 2014
RE: Integral in solve on HP 42S?
This is how I did the calculation for Normal distribution.

First set accuracy by entering number of decimal digits accuracy required, eg

4

then activate FXACC

Code:
0.     { 21-Byte Prgm } 1.    ►LBL "FXACC" 2.     FIX IND ST X 3.     +/- 4.     10^X 5.     STO "ACC" 6.     CLX 7.     LASTX 8.     +/- 9.     END

to set accuracy to 0.0001

To find probability from Z value, enter Z & activate Z→P,

& to find Z value , enter P & activate P→Z.

Code:
0.     { 26-Byte Prgm } 1.    ►LBL "ΣDPREP" 2.     STO "ULIM" 3.     CLX 4.     STO "LLIM" 5.     INTEG "x" 6.     END 0.     { 96-Byte Prgm } 1.    ►LBL "NPDF" 2.     RCL "x" 3.     X^2 4.     -2 5.     ÷ 6.     E^X 7.     RTN 8.    ►LBL "Z→P" 9.     PGMINT "NPDF" 10.    ►LBL 00 11.     XEQ "ΣDPREP" 12.     PI 13.     RCL+ ST X 14.     SQRT 15.     ÷ 16.     0.5 17.     X<>Y 18.     - 19.     RTN 20.    ►LBL "?Z" 21.     RCL "z" 22.     XEQ 00 23.     RCL- 00 24.     RTN 25.    ►LBL "P→Z" 26.     PGMINT "NPDF" 27.     STO 00 28.     PGMSLV "?Z" 29.     4 30.     STO "z" 31.     SIGN 32.     SOLVE "z" 33.     END
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 Messages In This Thread Integral in solve on HP 42S? - lrdheat - 02-24-2019, 06:29 PM RE: Integral in solve on HP 42S? - Thomas Klemm - 02-24-2019, 08:13 PM RE: Integral in solve on HP 42S? - Gerald H - 02-25-2019, 05:17 AM RE: Integral in solve on HP 42S? - Werner - 02-25-2019, 07:43 AM RE: Integral in solve on HP 42S? - lrdheat - 02-24-2019, 08:15 PM RE: Integral in solve on HP 42S? - Thomas Klemm - 02-25-2019, 07:47 AM RE: Integral in solve on HP 42S? - Thomas Klemm - 02-25-2019, 08:09 AM RE: Integral in solve on HP 42S? - Werner - 02-26-2019, 07:41 AM RE: Integral in solve on HP 42S? - ijabbott - 02-26-2019, 08:39 AM RE: Integral in solve on HP 42S? - lrdheat - 02-26-2019, 03:15 AM RE: Integral in solve on HP 42S? - Thomas Okken - 02-26-2019, 03:30 AM RE: Integral in solve on HP 42S? - Thomas Klemm - 02-26-2019, 05:30 AM RE: Integral in solve on HP 42S? - Gerald H - 02-26-2019 09:29 AM

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