Newton-Raphson Method Error

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Cristian Segura Bidermann
评论： Dyuman Joshi 2025-7-6
I have an error in the following exercise, which I don't know why it happens. If you could help me I would be very grateful. The exercise is as follows:
My code corresponds to:
And the error that appears to me is the following:
I don't understand why the iteration limit is wrong.
  1 个评论
Pauli Huusari
Pauli Huusari 2025-7-6
Hi,
for me it seems that the row 15 in the function definition rfNewtonR is never reached, since the row 9 executes the command return when the for-looper i is equal to itmax. Executing the command return exits the function immediately. Therefore, the error message Iteration Limit Exceeded is not displayed/ thrown.
My suggestion is to remove the rows 8 - 10 in the function definition rfNewtonR. Then the row 15 is executed after the for-loop.
Best regards, Pauli Huusari

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回答（1 个）

Pauli Huusari
Pauli Huusari 2025-7-6
Hi,
for me it seems that the row 15 in the function definition rfNewtonR is never reached, since the row 9 executes the command return when the for-looper i is equal to itmax. Executing the command return exits the function immediately. Therefore, the error message Iteration Limit Exceeded is not displayed/ thrown.
My suggestion is to remove the rows 8 - 10 in the function definition rfNewtonR. Then the row 15 is executed after the for-loop.
Best regards, Pauli Huusari
  1 个评论
Dyuman Joshi
Dyuman Joshi 2025-7-6
"My suggestion is to remove the rows 8 - 10 in the function definition rfNewtonR."
They can not be removed as they follow the latter part of point #2 mentioned in the problem statement.
However, as per on point #3 - OP needs to modify the 1st if statment (i.e. lines 8-10) to include the error message. Then the code would be inline with the problem.

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