Problem 43026. Determinant of a 3x3 Matrix

Solution 1025604

Submitted on 21 Oct 2016 by Gareth Lee

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Test	Status	Code Input and Output
1	Pass	filetext = fileread('dtrmnt_3x3.m'); assert(isempty(strfind(filetext, 'det')),'det() forbidden')
2	Pass	x = [3 0 2; 2 1 -2; 0 1 1]; y_correct = 13; assert(sum(sum(abs(dtrmnt_3x3(x)-y_correct)))<1e-3)
3	Pass	x = [1 40 2; 7 -9 10; 1 0 1]; y_correct = 129; assert(sum(sum(abs(dtrmnt_3x3(x)-y_correct)))<1e-3)

Test

Status

Code Input and Output

Pass

filetext = fileread('dtrmnt_3x3.m'); assert(isempty(strfind(filetext, 'det')),'det() forbidden')

Pass

x = [3 0 2; 2 1 -2; 0 1 1]; y_correct = 13; assert(sum(sum(abs(dtrmnt_3x3(x)-y_correct)))<1e-3)

Pass

x = [1 40 2; 7 -9 10; 1 0 1]; y_correct = 129; assert(sum(sum(abs(dtrmnt_3x3(x)-y_correct)))<1e-3)