Problem 1057. Given a matrix, return the last eigen value

Solution 171844

Submitted on 3 Dec 2012 by James

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Test	Status	Code Input and Output
1	Pass	%% x = [1 2 3 0 4 3 2 5 -1 0 0 0 2 3 4 3 2 5 4 0 -9 0 0 -2 -3]; k = eig(x); y_correct = k(end); assert(isequal(last_eig(x),y_correct)) ans = 6.7330
2	Pass	%% x = [1 2 3 6 4 -1 -9 1 3]; k = eig(x); y_correct = k(end); assert(isequal(last_eig(x),y_correct)) ans = 5.6067
3	Pass	%% x = magic(6); k = eig(x); y_correct = k(end); assert(isequal(last_eig(x),y_correct)) ans = -9.7980

Test

Status

Code Input and Output

Pass

%% x = [1 2 3 0 4 3 2 5 -1 0 0 0 2 3 4 3 2 5 4 0 -9 0 0 -2 -3]; k = eig(x); y_correct = k(end); assert(isequal(last_eig(x),y_correct))

ans = 6.7330

Pass

%% x = [1 2 3 6 4 -1 -9 1 3]; k = eig(x); y_correct = k(end); assert(isequal(last_eig(x),y_correct))

ans = 5.6067

Pass

%% x = magic(6); k = eig(x); y_correct = k(end); assert(isequal(last_eig(x),y_correct))

ans = -9.7980

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