>> ones(3,1)
ans =
1
1
1
>> ones(1,3)
ans =
1 1 1
>> ones(3,1)'
ans =
1 1 1
>> ones(3,3)
ans =
1 1 1
1 1 1
1 1 1
>> rand(3,3)
ans =
0.8147 0.9134 0.2785
0.9058 0.6324 0.5469
0.1270 0.0975 0.9575
>> ans'
ans =
0.8147 0.9058 0.1270
0.9134 0.6324 0.0975
0.2785 0.5469 0.9575
>> format longE
>> ans
ans =
Columns 1 through 2
8.147236863931789e-01 9.057919370756192e-01
9.133758561390194e-01 6.323592462254095e-01
2.784982188670484e-01 5.468815192049838e-01
Column 3
1.269868162935061e-01
9.754040499940952e-02
9.575068354342976e-01
>> format shortE
>> ans
ans =
8.1472e-01 9.0579e-01 1.2699e-01
9.1338e-01 6.3236e-01 9.7540e-02
2.7850e-01 5.4688e-01 9.5751e-01
>> format shortG
>> ans
ans =
0.81472 0.90579 0.12699
0.91338 0.63236 0.09754
0.2785 0.54688 0.95751
>> matrix0
n = 4 Error = 2.2e-16 Time = 4.3e-03
n = 8 Error = 4.4e-16 Time = 1.0e-04
n = 16 Error = 1.8e-15 Time = 9.5e-05
n = 32 Error = 4.9e-15 Time = 7.2e-05
n = 64 Error = 8.1e-15 Time = 1.5e-03
n = 128 Error = 1.5e-14 Time = 5.8e-03
n = 256 Error = 2.4e-14 Time = 8.2e-03
n = 512 Error = 2.2e-13 Time = 6.5e-03
n = 1024 Error = 6.1e-13 Time = 2.0e-02
n = 2048 Error = 2.3e-12 Time = 8.5e-02
>> matrix1
n = 4 Error = 2.2e-16 Time = 5.6e-05
n = 8 Error = 4.4e-16 Time = 5.0e-05
n = 16 Error = 1.8e-15 Time = 5.8e-05
n = 32 Error = 4.9e-15 Time = 8.9e-05
n = 64 Error = 8.1e-15 Time = 3.9e-04
n = 128 Error = 1.5e-14 Time = 2.9e-04
n = 256 Error = 2.4e-14 Time = 1.6e-03
n = 512 Error = 2.2e-13 Time = 8.2e-03
n = 1024 Error = 6.1e-13 Time = 2.3e-02
n = 2048 Error = 2.3e-12 Time = 1.4e-01
n = 4096 Error = 4.3e-12 Time = 4.7e-01
n = 8192 Error = 1.1e-11 Time = 3.1e+00
ans =
12
ans =
1.4439 -16.629
>> matrix1
n = 4 Error = 2.2e-16 Time = 7.4e-05
n = 8 Error = 4.4e-16 Time = 6.6e-05
n = 16 Error = 1.8e-15 Time = 6.0e-05
n = 32 Error = 4.9e-15 Time = 9.5e-05
n = 64 Error = 8.1e-15 Time = 4.2e-04
n = 128 Error = 1.5e-14 Time = 5.9e-04
n = 256 Error = 2.4e-14 Time = 1.8e-03
n = 512 Error = 2.2e-13 Time = 1.3e-02
n = 1024 Error = 6.1e-13 Time = 3.1e-02
n = 2048 Error = 2.3e-12 Time = 1.4e-01
n = 4096 Error = 4.3e-12 Time = 6.0e-01
n = 8192 Error = 1.1e-11 Time = 3.1e+00
n = 16384 Error = 1.3e-10 Time = 2.1e+01
>> van
n = 4 Error = 4.4e-16 Time = 8.5e-03
n = 8 Error = 3.8e-09 Time = 1.2e-04
Warning: Matrix is close to singular or badly scaled. Results may be
inaccurate. RCOND = 1.116062e-18.
> In van (line 25)
n = 16 Error = 1.5e+01 Time = 9.4e-03
Warning: Matrix is close to singular or badly scaled. Results may be
inaccurate. RCOND = 4.735460e-21.
> In van (line 25)
n = 32 Error = 5.1e+03 Time = 1.2e-03
Warning: Matrix is close to singular or badly scaled. Results may be
inaccurate. RCOND = 1.043691e-39.
> In van (line 25)
n = 64 Error = 2.5e+22 Time = 2.3e-03
Warning: Matrix is singular to working precision.
> In van (line 25)
n = 128 Error = NaN Time = 2.7e-03
>>