Estimated area under a curve program

[Jeremy]

I wrote a TI-86 program for estimating the area under a curve using "Right Rectangular Approximation Method" (RRAM), "Left..." (LRAM), and "Trapezoid" method.

However, it refuses to work. Sometimes it works, but I have gotten answers that are way off. Once i got something that was 3x the correct answer.

InpSt "Function;",EQ
St>Eq(EQ,y9)
Input "Min=",EN
Input "Max=",EX
Input "# of intervals:",EI
(EX-EN)/EI -> LI
EN -> NN
EN -> NP
0 -> AA
For (NN,EN,EX-LI,LI)
AA+y9(EN) -> AA
End
AA(LI) -> AA
0 -> AB
For (NP,EN+LI,EX,LI)
AB+y9(NP) -> AB
End
AB(LI) -> AB
(AA+AB)/2 -> AC
Disp "LRAM",AA
Disp "RRAM",AB
Disp "Trap",AC

why doesn't this work? also, could it be streamlined?

 

[Jeremy]

for simplicities sake i used -> as an arrow. i see now that it looks like a minus greater than sign.

 

[piercas]

I would recommend troubleshooting your program to identify where the error is occurring. It is possible that there is a mistake in the code or a logic error that is causing incorrect results. You could try running the program with different functions and intervals to see if the issue persists. Additionally, you could compare your program with other similar programs to see if there are any differences that could be causing the error.

In terms of streamlining the program, you could consider using more efficient coding techniques or incorporating different methods for estimating the area under the curve. It may also be helpful to add in error handling to catch any potential issues that could arise. Overall, it is important to thoroughly test and debug your program to ensure accurate results.