Cody

Problem 43301. Calculate inverse matrix in m by n matrix

Solution 1682518

Submitted on 28 Nov 2018
This solution is locked. To view this solution, you need to provide a solution of the same size or smaller.

Test Suite

Test Status Code Input and Output
1   Fail
x=(1:10)' y=3*x a=3 assert(abs(reginv(x,y)-a)<0.001)

x = 1 2 3 4 5 6 7 8 9 10 y = 3 6 9 12 15 18 21 24 27 30 a = 3

Error using * Incorrect dimensions for matrix multiplication. Check that the number of columns in the first matrix matches the number of rows in the second matrix. To perform elementwise multiplication, use '.*'. Error in reginv (line 2) a = x*y; Error in Test1 (line 5) assert(abs(reginv(x,y)-a)<0.001)

2   Fail
x=(1:10)' y=3*x+2 a=3.2857 assert(abs(reginv(x,y)-a)<0.001)

x = 1 2 3 4 5 6 7 8 9 10 y = 5 8 11 14 17 20 23 26 29 32 a = 3.2857

Error using * Incorrect dimensions for matrix multiplication. Check that the number of columns in the first matrix matches the number of rows in the second matrix. To perform elementwise multiplication, use '.*'. Error in reginv (line 2) a = x*y; Error in Test2 (line 5) assert(abs(reginv(x,y)-a)<0.001)