test_inverse.java on tough matrix to invert
initializing big matrix, n=2, n*n=4
data
AA[0][0]=0.5
AA[0][1]=0.3333333333333333
AA[1][0]=0.3333333333333333
AA[1][1]=0.25
inverse
AI[0][0]=17.999999999999993
AI[0][1]=-23.99999999999999
AI[1][0]=-23.99999999999999
AI[1][1]=35.999999999999986
AI[2][2]=35.999999999999986
sum of error=0.0, avg error=0.0
initializing big matrix, n=4, n*n=16
data
AA[0][0]=0.5
AA[0][1]=0.3333333333333333
AA[0][2]=0.25
AA[0][3]=0.2
AA[1][0]=0.3333333333333333
AA[1][1]=0.25
AA[1][2]=0.2
AA[1][3]=0.16666666666666666
AA[2][0]=0.25
AA[2][1]=0.2
AA[2][2]=0.16666666666666666
AA[2][3]=0.14285714285714285
AA[3][0]=0.2
AA[3][1]=0.16666666666666666
AA[3][2]=0.14285714285714285
AA[3][3]=0.125
inverse
AI[0][0]=200.00000000008646
AI[0][1]=-1200.0000000006012
AI[0][2]=2100.000000001144
AI[0][3]=-1120.000000000644
AI[1][0]=-1200.0000000006016
AI[1][1]=8100.000000004175
AI[1][2]=-15120.000000007929
AI[1][3]=8400.000000004458
AI[2][0]=2100.0000000011446
AI[2][1]=-15120.000000007929
AI[2][2]=29400.000000015047
AI[2][3]=-16800.000000008455
AI[3][0]=-1120.0000000006441
AI[3][1]=8400.000000004458
AI[3][2]=-16800.000000008455
AI[3][3]=9800.000000004748
AI[4][4]=9800.000000004748
sum of error=2.3874235921539366E-12, avg error=1.4921397450962104E-13
initializing big matrix, n=8, n*n=64
AI[8][8]=6.625478772311018E8
sum of error=5.2323739510029554E-6, avg error=8.175584298442118E-8
initializing big matrix, n=16, n*n=256
Matrix is singular !
AI[16][16]=1.2779742893230408E13
sum of error=23.548227085612336, avg error=0.09198526205317319
initializing big matrix, n=32, n*n=1024
Matrix is singular !
AI[32][32]=1.1667124196440765E11
sum of error=87.6284542332042, avg error=0.08557466233711347
initializing big matrix, n=64, n*n=4096
Matrix is singular !
AI[64][64]=3.4477436388331484E13
sum of error=1.0425733946882269E14, avg error=2.545345201875554E10
initializing big matrix, n=128, n*n=16384
Matrix is singular !
AI[128][128]=4.5763560239391345E11
sum of error=536.3290258375278, avg error=0.03273492589340379
initializing big matrix, n=256, n*n=65536
Matrix is singular !
AI[256][256]=1.327978193099471E14
sum of error=1243.8872060971216, avg error=0.018980212495378443
finished test_inverse.java