quad8 in matlab 7

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Ana Royce 2016-8-28

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https://ww2.mathworks.cn/matlabcentral/answers/301131-quad8-in-matlab-7

编辑： Walter Roberson 2022-2-12

quad8 is higher-order terms and this function available in matlab 6.5 however, not in matlab 7. Gone through your side side and found the following : quad8, a higher-order method, has the same calling sequence as quad.

1) Can i replace my quad8 function to quad and will that work as higher order term as quad8?

Please assist.

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Answer 1

Walter Roberson 2016-8-28

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https://ww2.mathworks.cn/matlabcentral/answers/301131-quad8-in-matlab-7#answer_232947

No. As I already indicated https://www.mathworks.com/matlabcentral/answers/299771-undefined-function-or-method-quad8-for-input-arguments-of-type-char#comment_385612 the replacement was quadl not quad. In turn, quadl is being replaced by integral in current versions (R2012a and later.)

If you specifically need Newton-Cotes 8 Panel (quad8) then use https://www.mathworks.com/matlabcentral/fileexchange/8999-summed-newton-cotes-rules with nodes set to 8.

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Ana Royce 2016-8-30

Hi Walter , Many thanks for your kind help on fsolve , quad8 and etc.. Manage to solve issues that persists matlab7 during conversion from old code version (matlab6.5).

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