Final answer:
To write the specific code in MATLAB, ask the user to enter a vector of coefficients for the polynomial model, verify that the entry has an even number of elements, and prompt the user to re-enter if an invalid vector is entered.
Step-by-step explanation:
In MATLAB, you can write the code to ask the user to enter a vector of coefficients for the polynomial model as follows:
coefficients = input('Enter the vector of coefficients: ')
To verify that the entry has an even number of elements, you can use the mod function:
if mod(length(coefficients), 2) ~= 0
For the validation and re-entering logic, you can use a while loop:
valid = false;
attempts = 0;
while ~valid && attempts <= 5
if mod(length(coefficients), 2) ~= 0
coefficients = input('Enter a valid vector of coefficients: ')
attempts = attempts + 1;
else
valid = true;
end
end
If the user does not enter an acceptable vector after 5 attempts, you can display a warning and remove the last element using:
if attempts > 5
warning('No valid vector entered after 5 attempts. Removing the last element.')
coefficients(end) = [];