[Tex/LaTex] Color on tree using Tikz

tikz-pgftikz-trees

I want to highlight a certain path on a probability tree that I draw using tikz and forest (thanks to this source):

    \documentclass[11pt]{article}
    \usepackage{tikz}
    \usepackage{forest,nicefrac}
    \begin{document}
    % Set the overall layout of the tree
    \tikzstyle{level 1}=[level distance=3.5cm, sibling distance=3.5cm]
    \tikzstyle{level 2}=[level distance=3.5cm, sibling distance=2cm]
    % Define styles for bags and leafs
    \tikzstyle{bag} = [text width=4em, text centered]
    \tikzstyle{end} = [circle, minimum width=3pt,fill, inner sep=0pt]
    % The sloped option gives rotated edge labels. Personally
    % I find sloped labels a bit difficult to read. Remove the sloped options
    % to get horizontal labels. 
    \begin{tikzpicture}[grow=right, sloped]
\node[bag] {}
    child {
        node[bag] {II $(2R,1B)$}        
            child {
                node[end, label=right:
                    {$P(B\cap II)=\frac{1}{2}\cdot\frac{1}{3}$}] {}
                edge from parent
                node[above] {$B$}
                node[below]  {$\frac{1}{3}$}
            }
            child {
                node[end, label=right:
                    {$P(R\cap II)=\frac{1}{2}\cdot\frac{2}{3}$}] {}
                edge from parent
                node[above] {$R$}
                node[below]  {$\frac{2}{3}$}
            }
            edge from parent 
            node[above] {$II$}
            node[below]  {$\frac{1}{2}$}
    }
    child {
        node[bag] {I $(2R,4B)$}        
        child {
                node[end, label=right:
                    {$P(B\cap I)=\frac{1}{2}\cdot\frac{4}{6}$}] {}
                edge from parent
                node[above] {$B$}
                node[below]  {$\frac{4}{6}$}
            }
            child {
                node[end, label=right:
                    {$P(R\cap I)=\frac{1}{2}\cdot\frac{2}{6}$}] {}
                edge from parent
                node[above] {$R$}
                node[below]  {$\frac{2}{6}$}
            }
        edge from parent         
            node[above] {$I$}
            node[below]  {$\frac{1}{2}$}
    };
\end{tikzpicture}
    \end{document}

How can I highlight the path I,R? It can be highlight just by making the edges ticker or a different color or change the background color, whatever you think it is better practice.

Best Answer

like this?

for this you need only add option [draw=red,ultra thick] to child :

         child[draw=red,ultra thick] { % <-- added option for emphasize line R
            node[end, label=right:
                {$P(R\cap I)=\frac{1}{2}\cdot\frac{2}{6}$}] {}
            edge from parent
            node[above] {$R$}
            node[below]  {$\frac{2}{6}$}
            }

Related Solutions

[Tex/LaTex] How to define the default vertical distance between nodes

I don't really get the question so I hope this is what you wanted. If you include a full document (such that we copy paste and see the problem on our systems) things are much more easier.

Here, you can change the default setting within a scope but your block style had a node distance which was resetting every time it is issued. I've made it 2mm such that we can see the difference easier.

\documentclass[tikz]{standalone}
\usetikzlibrary{arrows,shapes.geometric,positioning}

\begin{document}
\begin{tikzpicture}[decision/.style={diamond, draw, text width=4.5em, text badly centered, node distance=3.5cm, inner sep=0pt},
                    block/.style   ={rectangle, draw, text width=6em, text centered, rounded corners, minimum height=4em, minimum height=2em},
                    cloud/.style   ={draw, ellipse, minimum height=2em},
                    line/.style    ={draw,-latex'},
                    node distance = 1cm, 
                    auto]
    \node [block] (1st) {1st};
    \node [block, right= of 1st]  (2nd1) {2nd1};
\begin{scope}[node distance=2mm and 10mm]%Here we change it for everything inside this scope
    \node [block, above= of 2nd1] (2nd2) {2nd2};
    \node [block, below= of 2nd1] (2nd3) {2nd3};
    \node [block, right= of 2nd1] (3rd1) {3rd1};
    \node [block, above= of 3rd1] (3rd2) {3rd2};
    \node [block, above= of 3rd2] (3rd3) {3rd3};
\end{scope}
    \node [block, below= of 3rd1] (3rd4) {3rd4};
    \node [block, below= of 3rd4] (3rd5) {3rd5};

    \path [line] (1st) -- (2nd1);
    \path [line] (2nd1) -- (2nd2);
    \path [line] (2nd1) -- (2nd3);
    \path [line] (2nd2) -- (3rd3);
    \path [line] (2nd1) -- (3rd1);
    \path [line] (1st) -- (2nd1);
\end{tikzpicture}
\end{document}

enter image description here

[Tex/LaTex] Mindmap level specific child distance

You can use level distance=<length> and/or sibling angle=<value> inside level <number>/.append style to customize the distance and angle for an specific level. A complete example:

\documentclass{article}
\usepackage{tikz}
\usetikzlibrary{mindmap,trees}

\begin{document}
\resizebox{!}{4 in}{%
   \begin{tikzpicture}
      \path[
         mindmap,
         concept color=black,
         text=white,
         grow cyclic,
         segment length=20cm,
level 1/.append style={level distance=8cm,sibling angle=60},
level 2/.append style={level distance=2.5cm},
      ]
      node[concept] {Main}
      [clockwise from=0]
      child[concept color=green!50!black] {%
         node[concept] {A}
         [clockwise from=30]
         child {node[concept] {A1} }
         child {node[concept] {A2} }
         child {node[concept] {A3} }
         child {node[concept] {A4} }
         child {node[concept] {A5} }
         child {node[concept] {A6} }
      }  
      child[concept color=blue] {%
         node[concept] {B}
         [clockwise from=30]
         child {node[concept] {B1} }
         child {node[concept] {B2} }
         child {node[concept] {B3} }
         child {node[concept] {B4} }
         child {node[concept] {B5} }
         child {node[concept] {B6} }
      }
      child[concept color=red] {%
         node[concept] {C}
         [clockwise from=30]
         child {node[concept] {C1} }
         child {node[concept] {C2} }
         child {node[concept] {C3} }
         child {node[concept] {C4} }
         child {node[concept] {C5} }
         child {node[concept] {C6} }
      }
      child[concept color=orange] {%
         node[concept] {D}
         [clockwise from=30]
         child {node[concept] {D1} }
         child {node[concept] {D2} }
         child {node[concept] {D3} }
         child {node[concept] {D4} }
         child {node[concept] {D5} }
         child {node[concept] {D6} }
      }
      child[concept color=magenta] {%
         node[concept] {E}
         [clockwise from=30]
         child {node[concept] {E1} }
         child {node[concept] {E2} }
         child {node[concept] {E3} }
         child {node[concept] {E4} }
         child {node[concept] {E5} }
         child {node[concept] {E6} }
      }
      child[concept color=brown] {%
         node[concept] {F}
         [clockwise from=30]
         child {node[concept] {F1} }
         child {node[concept] {F2} }
         child {node[concept] {F3} }
         child {node[concept] {F4} }
         child {node[concept] {F5} }
         child {node[concept] {F6} }
      };
   \end{tikzpicture}
}
\end{document}

enter image description here

Best Answer

Related Solutions

[Tex/LaTex] How to define the default vertical distance between nodes

[Tex/LaTex] Mindmap level specific child distance

Related Question