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I have a syntax error with Fcn

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Quy Long Vu
Quy Long Vu 2020-9-28
评论： Ameer Hamza 2020-9-28
I want to give a formula is sign(u(2)-u(3)) into Fcn, but I got a message is
The expression: sign(u(2)-u(3))
in 'hebonnuoc/He bon nuoc /h1dot'
has a syntax error

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Ameer Hamza
Ameer Hamza 2020-9-28
编辑：Ameer Hamza 2020-9-28
The documentation page shows that you should use sgn instead of sign: https://www.mathworks.com/help/simulink/ref_obsolete_blocks/fcn.html
sgn(u(2)-u(3))
Also, this block is obsolete; consider using a better alternative: https://www.mathworks.com/help/simulink/slref/matlabfunction.html

更多回答（1 个）

Fangjun Jiang
Fangjun Jiang 2020-9-28
Use "sgn" instead of "sign". It is in the document. Click "Help" after double click the block.

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