# [Tex/LaTex] Beginner: Drawing using Tikz

technical-drawingtikz-pgf

I was quite impressed by the figures generated by TikZ and wanted to try TikZ to generate a few figures (please see the attached image drawn using an external WYSWYG program). When I tried to reproduce the figures myself using TikZ I found it very difficult to control the shapes in required positions. What is the simplest method to draw!these figures using TikZ?

With next code you can obtain first example. All others can be easily done after reading first tutorial in TiKZ documentation (pgfmanual).

\documentclass[tikz,border=3mm]{standalone}
\begin{document}
\begin{tikzpicture}
\draw [->] (-1.5,0)--(3,0);
\draw [->] (0,-1.5)--(0,3);
\draw[dashed] (-1,0)--(0,1)--(1,0)--(0,-1)--cycle;
\node[below left] at (0,0) {$x$};
\draw[shorten <=-1cm, shorten >=-3mm] (0,1)--(2,0) node [midway, above] {$A$};
\node[above right] at (0,1) {$\hat{x}$};
\end{tikzpicture}
\end{document}