misc

tikz/lda-gauss-1/lda-gauss-1.tex

@@ -1,4 +1,4 @@
-\documentclass[varwidth=true, border=4pt]{article}
+\documentclass[varwidth=true, border=5pt]{article}
 \usepackage[active,tightpage]{preview}
 \usepackage[latin1]{inputenc}
 \usepackage{amsmath}
@@ -18,16 +18,18 @@ every axis label/.append style={font=\sffamily\footnotesize},
 
 \begin{document}
 \begin{preview}
+\tikzstyle{plotA}=[ultra thick,red!90!black]
+\tikzstyle{plotB}=[ultra thick,cyan!50!black]
 \begin{tikzpicture}
     \begin{axis}[
         width=13.5cm,
         height=8.625cm,
         % Grid
         grid = major,
-        grid style={black, thin},
+        %grid style={thin, dashed},
         % size
         xmin= 0,     % start the diagram at this x-coordinate
-        xmax= 120,   % end   the diagram at this x-coordinate
+        xmax= 125,   % end   the diagram at this x-coordinate
         ymin= 0,     % start the diagram at this y-coordinate
         ymax= 0.045, % end   the diagram at this y-coordinate
         % Legende
@@ -41,30 +43,53 @@ every axis label/.append style={font=\sffamily\footnotesize},
         },
         % Ticks
         tick align=inside,
-        minor tick num=3,
+        %minor tick num=3,
         minor tick style={thick},
         scaled y ticks = false,
-        yticklabel={\pgfmathparse{\tick*100}\pgfmathprintnumber{\pgfmathresult}\%},
-        yticklabel style={
-            %/pgf/number format/precision=2,
-            /pgf/number format/fixed,
-            %/pgf/number format/fixed zerofill
-            },
+        xtick={40,70,80},
+        ytick=\empty,
+        % yticklabel={\pgfmathparse{\tick}\pgfmathprintnumber{\pgfmathresult}},
+        % yticklabel style={
+        %     %/pgf/number format/precision=2,
+        %     /pgf/number format/fixed,
+        %     %/pgf/number format/fixed zerofill
+        %     },
         % Axis
+        axis lines = middle,
         axis line style = very thick,
         xlabel=$x$,
         x label style={at={(axis description cs:0.5,0)},
                        anchor=north,
                        font=\boldmath\Large},
-        ylabel=$\mathcal{N}_{\mu, \sigma^2}(x)$,
-        y label style={at={(axis description cs:0.05,0.5)},
+        ylabel=$f(x)$,
+        y label style={at={(axis description cs:0,0.5)},
                        anchor=south,
+                       rotate=90,
                        font=\boldmath\Large},
         ]
-        \addplot [domain=0:120,ultra thick,red!90!black,samples=200,] {gauss(80,100)};
-        \addplot [domain=0:120,ultra thick,cyan!50!black,samples=200] {gauss(40,100)};
-      \addlegendentry{$\mu=80,\enskip \sigma^2 = 100$}
-      \addlegendentry{$\mu=40,\enskip \sigma^2 = 100$}
+        % Plots of the distributions
+        \addplot [domain=0:120,samples=200,plotA] {gauss(80,100)};
+        \addplot [domain=0:120,samples=200,plotB] {gauss(40,100)};
+
+        % Mark points
+        \addplot+[plotA,
+                  samples at={70},
+                  mark=*,
+                  mark options={scale=1, fill=red!90!black}] {gauss(80,100)}
+            node[pin={95:\large$f_I(x_0) = 70$}] {};
+        \addplot+[plotB,
+                  samples at={70},
+                  mark=*,
+                  mark options={scale=1, fill=cyan!50!black}] {gauss(40,100)}
+            node[pin={10:\large$f_{II}(x_0) = 70$}] {};
+        \coordinate (a) at (axis cs:70,0.024);
+        \draw[black,thick](a |- current plot begin) -- (a);
+
+        % Add labels
+        \node[plotA,above] at (axis cs:100,0.03){\Large $\mathcal{N}(80, 100)$};
+        \node[plotB,above] at (axis cs:20,0.03){\Large $\mathcal{N}(40, 100)$};
+      % \addlegendentry{$\mu=80,\enskip \sigma^2 = 100$}
+      % \addlegendentry{$\mu=40,\enskip \sigma^2 = 100$}
     \end{axis} 
 \end{tikzpicture}
 \end{preview}