tikz

By Sigmund Tzeng

1 babel

1.1 tikz 設定，記得 exports both才能圖碼俱現

參 Exporting Code Blocks (The Org Manual) ，其它選項有 code, results, none 

\begin{tikzpicture}[domain=-2:2,samples=100,scale=1.0,>=latex]
\tikzset{bgrid/.style={help lines,color=blue!10,very thin}}
\draw[bgrid] (-1.5,-3.5) grid (7.5,3.5);
\draw[<->, color=black] (-1.5,0) -- (7.5,0) node[right] {$x$};
\draw[<->, color=black] (0,-3.5) -- (0,3.5) node[above] {$y$};
\foreach \x/\xtext in {-1,1,2,3,4,5,6,7}
\draw (\x cm,1pt) -- (\x cm,-1pt) node[anchor=north] {$\xtext$};
\foreach \y/\ytext in {-3,-2,-1,1,2,3}
\draw (1pt,\y cm) -- (-1pt,\y cm) node[anchor=east] {$\ytext$};
\draw[thick,color=black,domain=0:7.5,smooth]plot (\x,{sqrt(\x)}) node[anchor=south] {$y = \sqrt{x}$};
\draw[dashed,color=black,domain=0:7.5,smooth]plot (\x,{(-1)*(sqrt(\x))}) node[anchor=north] {$y = -\sqrt{x}$};
%\draw[thick,color=black,domain=-1.5:5.5,samples=3]plot (\****)-2}) node[anchor=south] {$y = {x} - 2$};
\filldraw[black] (4,2) circle(2pt) node[anchor=south east] {$(4, 2)$};
\filldraw[red] (1,-1) circle(2pt);
\draw[red] (1.5,-1) node[anchor=west] {$(1, -1)$};
\end{tikzpicture}

1.2 tikz0 可預覽，亦可匯出為 pdf 或 html

Set up the TikZ in Emacs Org | MSC

1.3 tikz2

1.4 Graph Drawing - PGF/TikZ Manual

1.5 FSM

Automata Drawing Library - PGF/TikZ Manual

2 preview / export

2.1 tikz3

2.1.1 not ok

2.2 tikz4

目前預覽或匯出為pdf是ok的，指令/組合鍵為：C-c C-e C-s l o。匯出 html 則只有單行的 latex 能成功

2.3 tikz5

For MiKTEX, use the update wizard to install the (latest versions of the) packages called pgf, xcolor, and xkeyval. 但是預設已經都安裝了

(org-babel-do-load-languages ‘org-babel-load-languages ‘((latex . t))) ;手動加在設定檔中，這使得 babel 可以執行，但仍無正確出圖

(add-to-list ‘org-latex-packages-alist ‘("" “tikz” t)) ;這個部分檔頭已經有宣告，沒有必要了 org-latex-default-packages-alist org-format-latex-header

(setq org-latex-create-formula-image-program ‘imagemagick) ;dvipng? 目前未安裝 imagemagick

tikz pgf - Why are my characters overlapping? - TeX - LaTeX Stack Exchange dvipng 輸出的圖會纏在一起

Using the tex:dvipng option - exporter does not find tikz package : orgmode

(setq org-latex-create-formula-image-program ‘dvisvgm) (setq org-preview-latex-default-process ‘dvisvgm) ;dvipng

但是檔名必需設為 png ??? 設為 svg 完全無法產生圖檔，是為何??? 可能的說明在以下連結

latex block tikz to svg 原作者應為 Edouard Debry，簡單來說就是要改 ob-latex.el

subject:“Re\: latex block tikz to svg”

Pdftex: Inkscape svg to pdflatex code example 這篇寫得亂七八糟，感覺是 ai 寫的

2.3.1 改 ob-latex.el 把 png 改成 svg

     ((and (string-suffix-p ".png" out-file) (not imagemagick)) <br/>

改成 ((and (string-suffix-p “.svg” out-file) (not imagemagick))

2.3.2 set git bash as shell in emacs 似乎沒有影響

(setq binary-process-input t) ;??? (setq w32-quote-process-args ?\") ;??? (setenv “SHELL” shell-file-name) ;這好像要設? (setq explicit-shell-file-name “C:/Program Files/Git/git-bash.exe”) ;原值為nil (setq explicit-sh-args ‘("-login" “-i”)) ;???

2.4 tikz6 預覽時 chemfig 不行，但匯出可

3 Plots of Functions - PGF/TikZ Manual

TikZ and pgf Manual for version 1.18