In continue to the great answer provided in: Changing a tikz figure to have more blocks

I'd like to modify this figure and add an "adder" node with arrow and text, and also add a text near the entrance above the lower arrow (see "nn" text in the figure). The new figure should look like: enter image description here



  block/.style = { draw,
                   minimum height = 3em,
   wide block/.style = {
                   text width=2.5cm,
                   minimum width = 8em,

  \begin{tikzpicture}[auto, thick, node distance=2cm, >=Triangle]
    \node[wide block] (glamor) {glamor};
    \node[wide block, right = 15mm of glamor] (trainer) {trainer};
    \node[block, below=10mm of glamor.south east](M){M};
    \node[block, below=10mm of trainer.south west](L){L};
    \node[adder](A1) at (M-|glamor.south west){+};
    \draw[<-](glamor.west) --node[above]{$mm$} ++(-2,0);
    \draw[->](glamor) -- node {$mnn$} (trainer);
    \draw[->](trainer.east) -- node[name=y]{$ppx$} ++ (2,0);
    \draw[->,rounded corners](trainer.east) -- ++(1,0) |- (L);
    \draw[<-, rounded corners]([yshift=1mm]glamor.south west) 
           -- ++(-1,0) node[above right]{$nn$}  |- (A1);
    \draw (A1) -- (M);
    \draw[<-] (A1.south) -- ++ (0,-5mm) node[pos=0.7,left]{$w$};


enter image description here

| improve this answer | |
  • How can I add the "nn" text as in the question? same to the "w", thanks! – Codevan Apr 28 '19 at 12:34
  • 1
    @Codevan Added. – user121799 Apr 28 '19 at 12:38
  • When I integrate this code with another, I get the error: "Paragraph ended before \pgfkeys@addpath was complete. \node [adder]" Do you know why it happens and how I can fix that? – Codevan Apr 28 '19 at 12:51
  • @Codevan May it be you forgot to add adder/.style={draw,circle} to your style definitions? – user121799 Apr 28 '19 at 12:53

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