Programming advice needed.


Ive been trying to write a program to calculate the radius of curvature for a fuction in terms of x at a specific value of x. What I want to do is put the function on level two and the value for x on level one and then execute.

fX '((1+f'X)^3/2)/f''X 'EVAL EVAL EVAL

This works but only if Ive got the X value stored as a VAR. I dont want that.

I want to do it all in one step without extra variables in the directory or calling another program.

X fX 'rad(X)=((1+f'X... is what Im trying to do but I cant find anything that deals with this. Im not sure if it can even be done. Any help would be appreciated. Oh yea, is there any other way of taking a second derivitive of fx without parenthasizing it twice? Tod Lewis



Please see my response sent in e-mail. This board unfortunately doesn't allow the use of characters like greater-than or less-than, making it very difficult to post User RPL solutions.


Possibly Related Threads...
Thread Author Replies Views Last Post
  [OT?]Orthography corrector needed. Diego Diaz 8 2,116 06-22-2013, 04:31 PM
Last Post: Andrew Nikitin
  HP-50g How to store many equations - help needed Timo Labrenz 5 1,733 03-03-2013, 12:22 PM
Last Post: Timo Labrenz
  Disaster: help for a couple of HP97 needed! Jose Gonzalez Divasson 10 2,443 01-21-2013, 04:45 PM
Last Post: aurelio
  HP41 emulator for HP48sx - keyboard overlay needed Doug (NYC) 3 1,305 12-31-2012, 03:11 PM
Last Post: Allen
  HP 50g advice Chris Smith 17 3,566 12-04-2012, 11:47 AM
Last Post: Peter Murphy (Livermore)
  restoring HP29C - help needed Alberto Fenini 9 2,059 11-25-2012, 07:56 AM
Last Post: Alberto Fenini
  New owner of 41c seeks advice mbrethen 46 8,528 09-16-2012, 10:09 AM
Last Post: mbrethen
  Advice on using the HP-50G Matt Agajanian 22 4,435 05-19-2012, 01:52 PM
Last Post: Matt Agajanian
  Restoring an HP-55, advice appreciated ! Alberto Fenini 4 1,398 05-15-2012, 03:43 AM
Last Post: Alberto Fenini
  aOT--Battery/battery contact care advice needed Matt Agajanian 0 933 04-24-2012, 07:35 PM
Last Post: Matt Agajanian

Forum Jump: