# Warning in you code [closed]

Neural Network representation

I took neural network drawing but i have an error on that:

``````\foreach \i in {1,2,3,4,5,6,7,8,9}{
\foreach \j in {1,2,3,4,5,6,7,8}{
\path[normal arrow,Cyan, draw opacity=0.2] (nx\i) -- (cl1n\j);
}
}
``````
• cl1n

is like not declared or defined can you help me?

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Welcome to TeX.SE. While code snippets are useful in explanations, it is always best to compose a fully compilable MWE that reproduces this problem. –  Peter Grill Feb 20 '13 at 2:46
I have updated the answer with a full MWE, including `xcolor` option and required TikZ libraries. Does the example work now for you (use LuaLaTeX)? –  Qrrbrbirlbel Feb 20 '13 at 3:12