Problem 44260. Multivariate polynomials - convert monomial form to array

Solution 1846511

Submitted on 11 Jun 2019 by William

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Test	Status	Code Input and Output
1	Pass	filetext = fileread('coeffArray.m'); assert(~contains(filetext,'regexp'))
2	Pass	exponents = 0; coefficients = randi(1000); cA = coefficients; assert(isequal(coeffArray(exponents,coefficients),cA))
3	Pass	coefficients = randi(1000,[10 1]); exponents = (9:-1:0)'; cA = coefficients; assert(isequal(coeffArray(exponents,coefficients),cA))
4	Pass	a = randi(1000); b = randi(1000); exponents = [2 0; 0 1]; coefficients = [a; b]; cA = [0 a; 0 0; b 0]; assert(isequal(coeffArray(exponents,coefficients),cA))
5	Pass	a = randi(1000); b = randi(1000); c = randi(1000); d = randi(1000); exponents = [2 0 0; 0 2 0; 0 0 2; 0 0 0]; coefficients = [a; b; c; d]; cA = zeros([3 3 3]); cA(1,3,3) = a; cA(3,1,3) = b; cA(3,3,1) = c; cA(3,3,3) = d; assert(isequal(coeffArray(exponents,coefficients),cA))
6	Pass	coefficients = randi(1000); nVars = randi(20)+1; exponents = ones(1,nVars); cA = zeros(2*ones(1,nVars)); cA(1) = coefficients; assert(isequal(coeffArray(exponents,coefficients),cA))