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2. ggplot2 - Wikipedia

   en.wikipedia.org/wiki/Ggplot2

   ggplot2 is an open-source data visualization package for the statistical programming language R.Created by Hadley Wickham in 2005, ggplot2 is an implementation of Leland Wilkinson's Grammar of Graphics—a general scheme for data visualization which breaks up graphs into semantic components such as scales and layers. ggplot2 can serve as a replacement for the base graphics in R and contains a ...

3. Best Free PDF Editors of 2023 - AOL

   www.aol.com/best-free-pdf-editors-2023-204004606...

   Google doesn't offer a free PDF editor. But you can edit files in Google Slides or Google Docs. First, upload the file to Google Drive. Then choose to open it with Google Docs or Slides. You can ...

4. PDFedit - Wikipedia

   en.wikipedia.org/wiki/PDFedit

   PDFedit is a free PDF editor for Unix-like operating systems (including Cygwin on top of Windows). It does not support editing protected or encrypted PDF files or word processor-style text manipulation, however. [1] PDFedit GUI is based on the Qt 3 toolkit and scripting engine , so every operation is scriptable.

5. List of PSPACE-complete problems - Wikipedia

   en.wikipedia.org/wiki/List_of_PSPACE-complete...

   Word problem for context-sensitive language [35] Intersection emptiness for an unbounded number of regular languages [32] Regular Expression Star-Freeness [36] Equivalence problem for regular expressions [21] Emptiness problem for regular expressions with intersection. [21] Equivalence problem for star-free regular expressions with squaring. [21]

6. Category:Free PDF software - Wikipedia

   en.wikipedia.org/wiki/Category:Free_PDF_software

   That is, software which can be freely used, copied, studied, modified, and redistributed by everyone that obtains a copy. Typically, this means software which is distributed with a free software license, and whose source code is available to anyone who receives a copy of the software. Free and open-source software portal

7. Help:Gallery tag - Wikipedia

   en.wikipedia.org/wiki/Help:Gallery_tag

   Generally, a gallery should not be added so long as there is space for images to be effectively presented adjacent to text. A gallery displays several pictures in an array or similar layout. Galleries can display images formed into rows and columns by use of the <gallery>...</gallery> parser (conversion of Wikitext to HTML) tag.