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- Path: sparky!uunet!nestroy.wu-wien.ac.at!exaib!bruhn
- From: bruhn@exaib (Peter Bruhn )
- Newsgroups: comp.sys.hp48
- Subject: beginner's questions
- Date: Mon, 28 Dec 92 11:04:37 MESZ
- Organization: WU-Wien
- Lines: 57
- Distribution: world
- Message-ID: <7255370768-317456@exaib>
- NNTP-Posting-Host: exaib.wu-wien.ac.at
-
- I got my HP48SX two days ago and have already a number of
- questions. I hope that some kind soul will answer some of them.
-
- 1. I would like to write some functions that are available in
- all (sub)directories. But I really don't want to put these functions
- into the HOME directory. Is there some way around?
-
- 2. The HP48SX is able to calculate the probability that a CHI-2
- random variable is greater than a given number (x). What I need
- is the inverse of this function: given a probability, calculate x.
- The only solution I see is something like:
-
- << -> F P
- <<
- << F UTP UTPC P - >>
- 'UTP' 2 ROOT
- >>
- >>
-
- But this is really sloooow. Is there a better way?
-
- 3. What does "HALT" in the status line mean?
-
- 4. I intend to write some econometric tools, so my questions are:
-
- 4a. Has someone already done so?
-
- 4b. How good is the INV-function (I have to use it often in
- econometrics)? My manuals include an additional sheet
- that advises me to use << DUP SIZE 1 GET IDN SWAP / >>
- instead of INV if the dimension of the Matrix is greater
- than 7. What do you think about it?
-
- 4c. Are there programs available to facilitate matrix-algebra?
-
- 5. Are there any OR tools available (LP, ILP, MILP, queing theory,...)?
-
- 6. What do the following cards do in detail:
-
- Statistik ROM (SESCO)
- Advanced math card (SRS Software)
-
- 7. What do you think about the following books, are the worth buying:
-
- Mastering yout HP48
- HP 48 insights
-
- 8. Are the following books for the HP28S useful for HP48 programming:
-
- Probability and Statistics
- Vectors and Matrices
- Mathematical Applications
-
- Thanks a lot
-
- Peter (bruhn AT uxe.wu-wien.ac.at)
-
-