Symbolic Matrix has extra blank row

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Carol Hurwitz 2018-9-4

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https://ww2.mathworks.cn/matlabcentral/answers/417490-symbolic-matrix-has-extra-blank-row

评论： Walter Roberson 2018-9-5

When I do this:

>> syms b
>> C = [1 b; b 2]
C =
                                     [1    b]
                                     [      ]
                                     [b    2]

The online example doesn't show this but I always get a blank row. What am I doing wrong? With all numbers, I get an ordinary matrix.

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回答（2 个）

madhan ravi 2018-9-4

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https://ww2.mathworks.cn/matlabcentral/answers/417490-symbolic-matrix-has-extra-blank-row#answer_335419

编辑：madhan ravi 2018-9-4

在 MATLAB Online 中打开

OR TRY:

C = str2sym('[1 b; b 2]')

Edited after Sir walter‘s comment.

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madhan ravi 2018-9-4

did it work @Carol Hurwitz?

madhan ravi 2018-9-5

编辑：madhan ravi 2018-9-5

If you find our (me and sir Walter‘s) answer useful please do accept my answer.

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Carol Hurwitz 2018-9-4

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https://ww2.mathworks.cn/matlabcentral/answers/417490-symbolic-matrix-has-extra-blank-row#answer_335428

I still get the same output, using your code. Is there a package I need to install?

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Carol Hurwitz 2018-9-5

编辑：Walter Roberson 2018-9-5

在 MATLAB Online 中打开

I installed MATLAB at work today, with symbolic package, and it works perfectly. I reinstalled it at home and I get the same error as before.

C = [b 1 3 6; 2 4*b b 7; 0 3 5 1]
C =
                               [b     1     3    6]
                               [                  ]
                               [2    4 b    b    7]
                               [                  ]
                               [0     3     5    1]

I am using different versions of Windows. At home I'm using 8.1, at work Win 10, both on 64 bit machines. It worked when I pulled it up on my iphone this afternoon.