How do I ensure the user inputs a minimum x value that's actually smaller than the maximum x value?

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Alexis Williams
Alexis Williams 2021-4-18
评论： Alexis Williams 2021-4-18
I am trying to get the user's minimum and maximum x values for the quadratic equation, but I don't know how to code to make sure that the minimum value doesn't equal or exceed the maximum value. Please help.
% Plotting a User-Entered Quadratic Function %
user_input = input(['Enter a, b, and c values for the quadratic equation',...
'\nax^2 + bx + c = 0. Input all three values in this form [a b c].',...
'\nInput values (including brackets): ']);
user_input1 = input(['Enter the minimum and maximum values of x in',...
'\nthe form [a b]: ']);

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采纳的回答

David Fletcher
David Fletcher 2021-4-18
isError = 1;
while isError
user_input1 = input(['Enter the minimum and maximum values of x in',...
'\nthe form [a b]: ']);
isError = ~(user_input1(1)<user_input1(2));
end

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