+- HP Forums (https://www.hpmuseum.org/forum)
+-- Forum: HP Calculators (and very old HP Computers) (/forum-3.html)
+--- Forum: General Forum (/forum-4.html)
+--- Thread: HP49-50G Solving by root or SYSEVAL (/thread-20849.html)
HP49-50G Solving by root or SYSEVAL - Gil - 11-16-2023 04:17 PM
I have the following program
on the HP50G :
P0
\\<< NOVAL \\-> p A
\\<< 'p-\\.S(-A,A,e^-X^2.,X)/\\v/\\pi' 'A' 2. # 2F12Ch SYSEVAL 'IERR' PURGE
\\>>
\\>>
Or
« NOVAL p A
« 'p-(-A,A,e^-X^2.,X)/' 'A' 2. # 2F12Ch SYSEVAL 'IERR' PURGE
»
I introduce a p value and find the A value by the solver.
Instead of ROOT, I use # 2F12Ch SYSEVAL, in order not to have to create and delete the unknown variable /value A.
But a 'iERF' variable is created to evaluate the accuracy.
How should I proceed for not having appear that 'iERF'?
Another question:
Suppose the function to be integrated and solved is almost all written in RPN mode:
\<< .8 0. \-> p A
\<<
\<< p A NEG DUP NEG 'e^-X^2.' \pi \v/ \->NUM / X \.S
\>> 'A' 2. # 2F12Ch SYSEVAL
\>>
\>>
What is here to be corrected?
If easier, suppose I use the ROOT command
and not # 2F12Ch SYSEVAL?
Thanks for your help.