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Best answer by Werner_E

You have to write S1:=F1(10,10) and NOT S1(u):=F1(10,10)

Werner_E_0-1657153915172.png

 

1 reply

25-Diamond I
July 6, 2022

Two errors:

1) you define a function Theta(...) in front of the solve block, but use an unknown function Thetatest(...) in the solve block equation

2) wrong syntax for odesolve (the function name Phi is NOT an argument of odesolve)

Werner_E_0-1657125759905.png

BTW, your "manual" calculations" below the solve block fail because they use a function Thetatest with just two arguments which isn't defined anywhere.

15-Moonstone
July 6, 2022

Thanks, but, sorry ----I posted the wrong worksheet. I corrected those errors you pointed out, but I still get an error when I try to plot the solution using Theta specialized to equal Thetatest. I have posted the correct worksheet this time.

Werner_E25-Diamond IAnswer
25-Diamond I
July 7, 2022

You have to write S1:=F1(10,10) and NOT S1(u):=F1(10,10)

Werner_E_0-1657153915172.png