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# 如何撰寫數學式及圖表 **[:arrow_right: 看此筆記的原始碼 :arrow_left:](/MathJax-and-UML-tw?both)** 您可以在 HackMD 上撰寫出很多種圖表與數學表達式,請參考以下的範例: ## MathJax 您可以使用 **MathJax** 語法 來產生 *LaTeX* 數學表達式,如同 [math.stackexchange.com](http://math.stackexchange.com/),但是開始的 `$` 後面以及結尾的 `$` 前面不能有空白: The *Gamma function* satisfying $\Gamma(n) = (n-1)!\quad\forall n\in\mathbb N$ is via the Euler integral 使用區塊層級的數學式時,請在您的數學式之前與之後給予 `$$` 以及換行: $$ x = {-b \pm \sqrt{b^2-4ac} \over 2a}. $$ $$ \Gamma(z) = \int_0^\infty t^{z-1}e^{-t}dt\,. $$ [更多關於 **LaTeX** 數學表達式 <i class="fa fa-external-link"></i>](http://meta.math.stackexchange.com/questions/5020/mathjax-basic-tutorial-and-quick-reference) UML 圖表 --- ### 循序圖 ```sequence 艾莉絲->包柏: 哈摟,你好嗎? Note right of 包柏: 包柏思考中 包柏-->艾莉絲: 我很好,謝謝! Note left of 艾莉絲: 艾莉絲回應 艾莉絲->包柏: 最近過得怎樣? ``` [更多關於 **循序圖** 語法 <i class="fa fa-external-link"></i>](http://bramp.github.io/js-sequence-diagrams/) &nbsp; &nbsp; --- ### 流程圖 您可以像是以下使用流程圖: ```flow st=>start: 開始 e=>end: 結束 op=>operation: 我的操作 op2=>operation: 啦啦啦 cond=>condition: 是或否? st->op->op2->cond cond(yes)->e cond(no)->op2 ``` [更多關於 **流程圖** 語法 <i class="fa fa-external-link"></i>](http://adrai.github.io/flowchart.js/) &nbsp; &nbsp; --- ### Graphviz ```graphviz digraph hierarchy { nodesep=1.0 // increases the separation between nodes node [color=Red,fontname=Courier,shape=box] //All nodes will this shape and colour edge [color=Blue, style=dashed] //All the lines look like this Headteacher->{Deputy1 Deputy2 BusinessManager} Deputy1->{Teacher1 Teacher2} BusinessManager->ITManager {rank=same;ITManager Teacher1 Teacher2} // Put them on the same level } ``` [更多關於 **graphviz** 語法 <i class="fa fa-external-link"></i>](http://www.tonyballantyne.com/graphs.html) &nbsp; &nbsp; --- ### Mermaid ```mermaid gantt title A Gantt Diagram section Section A task :a1, 2014-01-01, 30d Another task :after a1 , 20d section Another Task in sec :2014-01-12 , 12d anther task : 24d ``` [更多關於 **mermaid** 語法 <i class="fa fa-external-link"></i>](http://mermaid-js.github.io/mermaid) &nbsp; &nbsp; --- ### Abc ```abc X:1 T:Speed the Plough M:4/4 C:Trad. K:G |:GABc dedB|dedB dedB|c2ec B2dB|c2A2 A2BA| GABc dedB|dedB dedB|c2ec B2dB|A2F2 G4:| |:g2gf gdBd|g2f2 e2d2|c2ec B2dB|c2A2 A2df| g2gf g2Bd|g2f2 e2d2|c2ec B2dB|A2F2 G4:| ``` [更多關於 **abc** 語法 <i class="fa fa-external-link"></i>](http://abcnotation.com/learn) &nbsp; &nbsp; --- ### 相關功能 - [基本排版](https://hackmd.io/s/B1CII--57) - [在筆記中貼入程式碼](https://hackmd.io/s/Hk8sclbq7) ### 常見功能 - [如何刪除筆記](https://hackmd.io/s/rJrvQDm97) - [儲存我的筆記](https://hackmd.io/s/HkDYdjLcX) - [幫筆記加上標籤](https://hackmd.io/s/S1wjouv5X) &nbsp; ###### tags: `tutorial`

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