some latex org-bable settings

init.el

@@ -71,6 +71,15 @@
   (org-mode . visual-line-mode)
   (org-mode . org-display-inline-images)
   :config
+  (org-babel-do-load-languages
+   'org-babel-load-languages
+   '((ditaa . t)
+     (dot . t)
+     (shell . t)
+     (python . t)
+     (latex . t)
+     (gnuplot . t)))
+  (plist-put org-format-latex-options :scale 2.5)
   (setq org-startup-indented t
         org-hide-leading-stars t
         org-startup-folded 'content