matlab中计算结果出现NAN是什么意思a=[1 -1 -2 -1;2 1 1 1;1 1 0 -3;0 1 -1 -7],b=[0;0;0;0],c=a\ba = 1 -1 -2 -1 2 1 1 1 1 1 0 -3 0 1 -1 -7b = 0 0 0 0Warning: Matrix is
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![matlab中计算结果出现NAN是什么意思a=[1 -1 -2 -1;2 1 1 1;1 1 0 -3;0 1 -1 -7],b=[0;0;0;0],c=a\ba = 1 -1 -2 -1 2 1 1 1 1 1 0 -3 0 1 -1 -7b = 0 0 0 0Warning: Matrix is](/uploads/image/z/12546745-25-5.jpg?t=matlab%E4%B8%AD%E8%AE%A1%E7%AE%97%E7%BB%93%E6%9E%9C%E5%87%BA%E7%8E%B0NAN%E6%98%AF%E4%BB%80%E4%B9%88%E6%84%8F%E6%80%9Da%3D%5B1++-1+-2+-1%3B2+1+1+1%3B1+1+0+-3%3B0+1+-1+-7%5D%2Cb%3D%5B0%3B0%3B0%3B0%5D%2Cc%3Da%5Cba+%3D+++++1++++-1++++-2++++-1+++++2+++++1+++++1+++++1+++++1+++++1+++++0++++-3+++++0+++++1++++-1++++-7b+%3D+++++0+++++0+++++0+++++0Warning%3A+Matrix+is)
matlab中计算结果出现NAN是什么意思a=[1 -1 -2 -1;2 1 1 1;1 1 0 -3;0 1 -1 -7],b=[0;0;0;0],c=a\ba = 1 -1 -2 -1 2 1 1 1 1 1 0 -3 0 1 -1 -7b = 0 0 0 0Warning: Matrix is
matlab中计算结果出现NAN是什么意思
a=[1 -1 -2 -1;2 1 1 1;1 1 0 -3;0 1 -1 -7],b=[0;0;0;0],c=a\b
a =
1 -1 -2 -1
2 1 1 1
1 1 0 -3
0 1 -1 -7
b =
0
0
0
0
Warning: Matrix is singular to working precision.
c =
NaN
NaN
NaN
NaN
我手算明明有解,但是算出来没有意义.AX=B
matlab中计算结果出现NAN是什么意思a=[1 -1 -2 -1;2 1 1 1;1 1 0 -3;0 1 -1 -7],b=[0;0;0;0],c=a\ba = 1 -1 -2 -1 2 1 1 1 1 1 0 -3 0 1 -1 -7b = 0 0 0 0Warning: Matrix is
NAN=Not a number!
而且|A|=0 ,表明A是奇异矩阵,A的逆矩阵不存在!A\b是承认A的逆矩阵存在的情况下才能使用的!所以当然解不出来.
对于该题
R(A)=R(A,b)