Can anyone please tell me why I am getting this error?
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A =
2 4 1
3 1 4
5 6 0
>> A=finverse(A) Undefined function 'finverse' for input arguments of type 'double'.
>>
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回答 (3 件)
Star Strider
2014 年 8 月 27 日
編集済み: Star Strider
2014 年 8 月 27 日
The finverse function is in the Symbolic Math Toolbox, and creates the inverse of a symbolic function.
You likely want the inv function for your matrix. If you are doing matrix calculations, it is preferable to use the mldivide function, or more directly the (\) (backslant) operator (if possible in your calculations).
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Christopher Creutzig
2014 年 8 月 29 日
Your sequence of commands does not create a symbolic matrix. The assignment to A discards the previous symbolic variable A.
A = sym([2 4 1
3 1 4
5 6 0])
inv(A)
ans =
[ -8/15, 2/15, 1/3]
[ 4/9, -1/9, -1/9]
[ 13/45, 8/45, -2/9]
Image Analyst
2014 年 8 月 27 日
finverse() is not in base MATLAB. Do you think it is suppose to be in one of your toolboxes? If so, which one? List in in the products drops down list below this comment. Or is it a custom function you wrote but did not include here?
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