User-Defined function to add polynomials

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Jose De La Pena
Jose De La Pena 2019-12-14
评论： Walter Roberson 2019-12-14
function p= polyno(p1,p2,operation)
%Write a user-defined function that adds are substract polynomials of any two orders
len_p1=length(p1);
len_p2=length(p2);
if len_p1 > len_p2
tmp=[zeros(1:len_p1-len_p2),p2];
p2=tmp;
elseif len_p1 < len_p2
tmp=[zeros(1:len_p2-len_p1),p1];
p1=tmp;
end
if operation == 'Add'
p = p1 + p1;
elseif operation == 'Subtract'
p = p1 - p2;
else
error('Must enter "Add" or "Subtract" to complete operation')
end
end
I know there is a lot of problems witht the code, but the main problems is that it wont add diffrent ordered polynomials correctly, and also it doesnt let me subtract polynomials, it tells me theres an error with the line of the code that tells it to add. How would I go about fixing this?
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Jose De La Pena
Jose De La Pena 2019-12-14
Additionally, I thought I already encounted for the zeroes with adding extra ones for the difference between the length of the two polynomials.
Walter Roberson
Walter Roberson 2019-12-14
Remember that zeros(1:5) is the same as zeros([1,2,3,4,5]) which creates a n array that is 1 * 2 * 3 * 4 * 5

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