HP 35s and Solve button (but not in equation catalogue)

09302014, 06:27 PM
(This post was last modified: 09302014 09:27 PM by Dieter.)
Post: #9




RE: HP 35s and Solve button (but not in equation catalogue)
(09302014 11:52 AM)mcjtom Wrote: When I try to wrap function in programme, I get SOLVE ACTIVE message. What do I do from there? Simple  avoid the error. ;) The message means that you use Solve (or Integrate, for that matter) within a program that is being solved. Quote:Here is the programme: There is your error. You start the program at label A which then tries to solve itself (FN=A). This obviously makes no sense. You even want to solve for an unknown variable B which is not used anywhere. Please keep in mind: "FN=A" defines the function/program at label A as the one that is to be solved. "SOLVE B" defines variable B as the one you want to know. Here is an example for a correctly working program: A001 LBL A A002 FN=B ; solve the equation following label B A003 SOLVE N ; and solve it for variable N (or P, or V, or R, or T) A004 VIEW N ; display result (required within a program) A005 RTN B001 LBL B ; here is your program/equation B002 PxV=NxRxT ; with these five variables P, V, N, R and T B003 RTN Please note the additional VIEW N statement in A004 that displays the result obtained by Solve. Within a program it is not displayed automatically. Simply because you may want to continue with that result instead of having it displayed. Within a program, Solve also works like a test command: if there is a result, the program continues with the next statement. If no result can be calculated, the next step is skipped (!). (09302014 11:52 AM)mcjtom Wrote: Maybe SF 11 has something to do with it, but I wasn't able to successfully use it... Flag 11 does not make a difference here. It just decides whether you are prompted for the variables or not. With flag 11 cleared you can use a sequence of INPUT statements (one for each variable) at the beginning of the program defining your function, and you will be asked for the known variables – cf. chapter 15 of the 35s manual. Dieter 

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