In[]:=
mb=SparseArray
Specified elements: 2432
Dimensions: {4096,8}
;
In[]:=
AbsoluteTiming[QRDecomposition[mb]]
Out[]=
0.426322,
1
10
2
,0,0,0,0,0,0,0,0,
3
40
2
,0,0,0,0,0,0,0,0,
3
40
2
,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
3
40
2
,0,0,0,0,0,0,0,0,
3
40
2
,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1
10
2
,0,-
1
20
2
,0,0,0,0,0,0,
3
40
2
,0,0,0,0,0,0,0,0,0,0,0,0,0,
⋯3924⋯
,0,0,0,
3
2
40
,0,0,0,0,0,0,0,0,0,
1
10
2
,0,0,0,0,0,0,-
1
10
2
,0,
1
10
2
,0,0,0,0,0,0,0,0,
1
40
2
,0,0,0,0,0,0,0,0,
1
40
2
,0,0,0,0,0,0,0,0,
1
10
2
,0,0,0,0,0,0,0,0,
1
40
2
,0,0,0,0,0,0,0,0,
1
40
2
,0,0,0,0,0,0,0,0,
1
10
2
,0,0,0,0,0,0,0,0,
1
10
2
,
⋯7⋯
,{
⋯1⋯
}
large output
show less
show more
show all
set size limit...