Gaussian integration for the HP-11C/15C

[Gerson W. Barbosa]

(11-30-2016 03:18 PM)Marcio Wrote:  I can not figure out why it won't work on the 15c. I thought it was because DSE (step 39) requires a pointer (I) on the 15C. Well, it is not.

No problem here. Probably you forgot to store the number of intervals in register I (see SlideRule's post above). Alternatively, you can do that programmatically:

    01 LBL A     16 CLX       31 RCL 1     
    02 STO I     17 STO 2     32 GSB E    
    03 Rv        18 LBL 0     33  8       
    04 STO 1     19 RCL 1     34  *
    05  -        20 RCL+3     35 STO-2
    06 RCL/I     21 GSB E     36 RCL 0
    07 STO 0     22  5        37 STO+1
    08  2        23  *        38 DSE I
    09  /        24 STO-2     39 GTO 0 
    10 STO+1     25 RCL 1     40 RCL*2 
    11  .        26 RCL-3     41  1
    12  6        27 GSB E     42  8
    13 SQRT      28  5        43  /
    14  *        29  *        44 RTN
    15 STO 3     30 STO-2     45 LBL E


Usage:

a ENTER b ENTER n ENTER GSB A

Example:

    47 LBL E         
    48 LN   
    49 RTN    

1 ENTER 2 ENTER 3 GSB A --> 0.386294376

Gerson.