modify code for polynomial function
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i try to modify this code but can't pass .please help with proper code function fh = poly_fun(p)
function polynomial = poly(x)
polynomial = 0;
ii = 1:length(p)
polynomial = polynomial + p(ii).*x.^(ii-1);
end
fh = @poly;
end
2 个评论
Rik
2020-9-8
Unforturnately for Mohaiminul Islam Google cache takes some time to update, so the evidence of his attempt to cheat is foiled. A permalink to what he posted can be found here (will take a few hours to become available).
Removing your question after receiving an answer and help is extremely rude. It is also pointless, because of comments like this enable your teacher to find your post, and because site admins can often restore your edit.
Rena Berman
2020-10-9
(Answers Dev) Restored edit
回答（1 个）
n = length(p)-1 ; % degree of polynomial
val = sum(p.*(x.^(n:-1:0)))
11 个评论
Walter Roberson
2020-9-7
sum(val)
Walter Roberson
2020-9-7
You do not tell us what the requirements are, so we cannot tell you whether the code is correct or not.
I would point out that you have no assignments inside your function poly(), and in particular do not assign to your left hand side, polynomial
Walter Roberson
2020-9-7
Notice that the sample code assigns to polynomial within function poly. Your code based upon KSSV's suggestion does not assign to polynomial within function poly.
Mohaiminul Islam
2020-9-7
Walter Roberson
2020-9-7
You need to assign to polynomial within the function poly
The internal function needs to accept a location to evaluate the polynomial at, and needs to return the value of the polynomial evaluated there.
Walter Roberson
2020-9-7
sum(polynomial) is not being assigned to any variable, and it has no semi-colon after the end of it. MATLAB is going to compute the value and then display it, but is not going to assign the result to anything. The effect is the same as
disp(sum(polynomial))
Mohaiminul Islam
2020-9-7
Walter Roberson
2020-9-8
You are not asked to display the sum of the polynomial. Therefore there are two possibilities that you will need to decide between:
- Delete the line sum(polynomial) as not contributing anything to what you are returning from the function; or
- Assign the result of sum(polynomial) to something.
Reminder:
The internal function needs to accept a location to evaluate the polynomial at, and needs to return the value of the polynomial evaluated there.
Mohaiminul Islam
2020-9-8
KSSV
2020-9-8
There should be sum. I missed it and Walter Roberson pointed it. Hat's off to Walter Roberson for your patience.
Mohaiminul Islam
2020-9-8
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