digraph des { rankdir=BT;ranksep=1.0;splines=false;bgcolor=transparent;
subgraph clusterGraph { style=invis;
node [label="\n",shape=circle,style=filled,color=black,fillcolor=lightblue];
{rank=same; f1 f2 f3 f4;}
{rank=same; i1 i2 i3;}
i1 -> f1;i1 -> f2;i1 -> f3;i1 -> f4;
i2 -> f1;i2 -> f2;i2 -> f3;i2 -> f4;
i3 -> f1;i3 -> f2;i3 -> f3;i3 -> f4;
f1 -> o1;f2 -> o1;f3 -> o1;f4 -> o1;
}; subgraph clusterLabel { style=invis;
node [color=transparent,fillcolor=transparent,fontcolor=black,fontname=Arial];
edge [color=transparent,labeldistance=3.5,fontname=Arial,labelangle=0];
l1 [label="Input x"];
l2 [label="Radial basis\nfunctions"];
l3 [label="Output y"];
l1 -> l2[headlabel="Weights"];
l2 -> l3[headlabel="Linear weights Wij"];
};}