Maxflat function generates error message for certain condition.

Question

Keonwook Kim 2017-8-6

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/351707-maxflat-function-generates-error-message-for-certain-condition

回答： Jan 2017-8-9

In the following situation, the maxflat function has error. Does any one have same problem? How can I fix that? Thank you.

>> [b,a] = maxflat(9,3,0.5,'trace'); Table:

    L         M         N         wo_min/pi wo_max/pi
0000         0    3.0000         0    0.2707
0000    1.0000    3.0000    0.2707    0.3710
0000    2.0000    3.0000    0.3710    0.4581
0000    3.0000    3.0000    0.4581    0.5419
0000    4.0000    3.0000    0.5419    0.6290
0000    5.0000    3.0000    0.6290    0.7293
0000    6.0000    3.0000    0.7293    1.0000

Error using cplxpair (line 67) Complex numbers can't be paired.

Error in zp2sos>orderzp (line 206) p = cplxpair(p);

Error in zp2sos (line 85) [z,p,lz,lp,L] = orderzp(z,p);

Error in maxflat>buildsos (line 506) [sosden,gden] = zp2sos(zeros(size(ar)),ar,1); %#ok

Error in maxflat (line 213) [sos,g] = buildsos(br,L,ar,a,b2);

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Answer 1

Sindhu Yerragunta 2017-8-9

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/351707-maxflat-function-generates-error-message-for-certain-condition#answer_277336

Hi Keonwook,

Please refer diagnostics section for why this error occurs:

https://in.mathworks.com/help/matlab/ref/cplxpair.html

Hope this helps you.

-Sindhu

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Keonwook Kim 2017-8-9

Thank you for the reply. The 'maxflat' is the genuine matlab toolbox function. I did not make it. I think that the Mathworks should aware this problem.

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