Emacs

Install org-plus-contrib

;; add this to your Emacs init file to be able to list the Org mode archives:

(require 'package)

(add-to-list 'package-archives '("org" . "http://orgmode.org/elpa/") t)

Then M-x list-packages RET will list both the latest org and
org-plus-contrib packages.

Start with an asterisk to make Headers and two asterisks for Subheaders

Example:

* Header

** Subheader

Give a title to your page using hash (#) and plus (+) symbols

Example: #+Title: Getting started with org-mode

Hide Numbers, table of contents

Example: #+Options: num:nil toc:nil

Write #+ and press Meta-<tab> to see the list of variables

Example:

#+AUTHOR: Vasilis Agiomyrgianakis

#+DATE: 120416

Use hyphen to make bullets

• bulleted

• list

• items

You can include quotations in Org mode documents like this:

#+BEGIN_QUOTE

'QUATATION'

#+END_QUOTE

QUATATION

Give emphasis to your text.

Write your text inside the below symbols:

• 2 asterics for Bold,

• 2 slashes for italics,

• 2 equals signs for verbatim,

• 2 pluses for strike through text

Bold, italics, verbatim, strikethrough

Press C-c C-l to link objects (files)

Example:

Link: https/:basmyr.net/

Then give a name to the linked text

Description: Basmyr.net

Press C-c C-o to open the linked plain text with an external program

Basmyr.net

or a video url

Granulator

Use pipes - vertical bars to make tables

Example: Start with pipes and some text:

| some | | Data |

then hit return, pipe (vertical bar), hyphen and tab to extend the table verticaly

Press tab and the arrows keys to make arrangements on the table

To insert an image with descriptions do the following:

Example-images

#+Caption: This is my image
#+Name: Fig 1
[[./images/myimage]]

#+BEGIN_SRC ditaa :file image/awesome.png

_ \_ _ _ _ _ _ __ _ //_\\ \ /\ / / _ \ _|/ _ \| ' ` _ \ / _ \ / _ \ V V / /\ \ (_) | | | | | | __/ \_/ \_/\_/\_/ \___||___/\___/|_| |_| |_|\___|

#+END_SRC

C-c C-c to evaluate lisp code inside source block

Find the path of ditaa.jar in you computer through a lisp program

(expand-file-name
             "ditaa.jar"
      (file-name-as-directory
            (expand-file-name
                "scripts"
               (file-name-as-directory
                  (expand-file-name
                      "../contrib"
                     (file-name-directory (org-find-library-dir "org")))))))

Pressing C-c C-e popups a buffer to export markups to HTML-PDF-etc.

Example: hit h and o if you want to export and open as html.

Export Beamer: C-c C-e l P (org-beamer-export-to-pdf)

Export PDF: C-c C-e l O

To export and open pdf make sure you have installed Mactex with extras no the basic version.

Export as LaTeX, and open PDF file.

Create code blocks to insert your code.

Press C-c ' inside the SRC block to edit the current code block

in the mode of the language you want. For instance:

#+BEGIN_SRC emacs-lisp

write some lisp to make your configurations in org-mode

so as to see bullets (UTF-8 characters) when you editing Headers in org-mode instead of asterisks.

Then close the source block with:

#+END_SRC

Result

     (require 'org-bullets)
(add-hook 'org-mode-hook
          (lambda () (org-bullets-mode 1)))

You can customise source blocks using M-x customize-face RET face RET

Evaluate source code. Press C-c C-c inside the block and see the results.

echo "Hello $USER! Today is `date`"

• Characters: α → β

• $O(n \log n)$

\begin{align*} q = 2 * 4 + 1 - 2 &= 7
q &=7 \end{align*}

write down <s and press tab to open src blocks,

<q tab for Quotes,

<e tab for Examples

<c tab for Center

etc.

to cooment a lisp region select a word or a region with C-M-space and then M-; to comment

For symbols such as degrees ° use the shortcut C-x 8 o

To check mapped symbols do C-x 8 C-h

For Footnotes use fn:1

##Example Footnotes##
i.e. The earth is round ...[fn:1]

[fn:1] It has actually been known that the Earth was round since the
time of the ancient Greeks. I believe that it was Pythagoras who first
proposed that the Earth was round sometime around 500 B.C.(https://starchild.gsfc.nasa.gov/docs/StarChild/questions/question54.html)

M-x toggle-read-only

type TODO to create a todo object Move the cursor one line after the TODO item and press C-c C-s (org-schedule) to schedule with agenda

TODO Call John SCHEDULED: <2016-11-09 Wed>

TODO read this and that SCHEDULED: <2016-11-10 Thu>

DONE export html minted (highlight colour - syntax source blocks) SCHEDULED: <2016-10-12 Wed>

To open week-agenda window press C-ca To schedule a TODO item press C-c C-s Use shift-arrows to change dates

Introduction to Environments (Github or Bitbucket) for organizing and sharing files-Git. Set up an account with Slack and Github.

Github

organize projects and share the individual processes using tools such as mass communication techniques Slack-Git.

Git:

• Create a Repository

• Create a Branch

• Make a Commit

• Push and Commit.

GitHub Hello world

Github example

Https://guides.github.com/activities/hello-world/, Https://gist.github.com/davfre/8313299

Magit

Download Magit

Install Magit using MELPA

Dired to the folder you want to create the .git file and press

M-x magit-init and press y

Then press M-x magit-remote-add

add remote rep to master or origin

Backup rep online on Github

First, create an ssh key to gain access into your repositories

Concatanate keys on terminal

ie. //cat id_rsa.pub | pbcopy

Press C-x m to display information about the current Git repository

Press C-x g for magit-status

s to stage files

c-c (write a comment) and then press C-c C-c to commit

The next step is to push to a remote branch on Github.

Press Shift-p p to push to a remote branch (master).

P-p to push to remote

If you use more than one computers for the same repo you need to pull first and then to push to remote repo.

On magit press F and p to pull to master. Then you are able to push into the location of this exact repository from your other computer. If later you want to upadate changes in your first computer you need to pull again and then push.

NOTE

This seems a little bit tricky but it might happen.

You might need to change the url of your repo in your first computer in case you didn't choose the same name for the folder where your project is located in your second computer. This happens, in case you first created the repo for example, in your laptop, in a folder named project1 and built your site i.e hugo, and then pull this repo into a folder with the name project2 in your other computer.

To change the repo address go to your .git folder inside your poroject and open config file. Then change the repo address to the new one.

i.e in config replace the old url with the new one:

[remote "origin"]

url = git@github.com:User/project1.git

url = git@github.com:User/project2.git

After you did this you will be able to push again from your first computer.

other issues

• Git refusing to merge unrelated histories

git cherry-pick -m 1 1234deadbeef1234deadbeef git rebase –continue

merge

Git failed…

Git refusing to merge unrelated histories

in magit press h to bring the popoup window and choose rebase -r and then -p

Install aspell with brew

$ brew install aspell --with-lang-en --with-lang-el --with-lang-de

for English, Hellenic and Deutsch languages.

if you have problems installing aspell with the above code

just do only:

$ brew install aspell

Install aspell using downloaded packages aspell-0.60.6.1

go to terminal and type:

$ cd ~/aspell path
$ ./configure
$ make
$ make install

To install additional dictionary download the language you prefer from GNU_Available Aspell Dictionaries

i.e aspell-el-0.50-3 for Hellenic language (Greek)

and go to terminal and type:

$ cd ~/dictionary path
$ ./configure
$ make
$ install

Switch dictionary

To switch between dictionaries run:

M-x: ispell-change-dictionary

and write greek for Hellenic language auto-correct

Press F6 (fn-F6) to switch between dictionaries (british, greek, german)

If you want to use the english dictionary in a particular buffer instead, put the following on the first line of the buffer:

-*- ispell-dictionary: "english" -*-

Use flyspell instead of ispell

(setq ispell-list-command "--list")

install YASnippet using MELPA

put the below into your init.el

(add-to-list 'load-path
             "~/.emacs.d/plugins/yasnippet")
(require 'yasnippet)
(yas-global-mode 1)

quit emacs and open again and type

M-x yas-new-snippet

• Give a name to your snippet

• give the abrev

• write your text or code you want to be expanted

• save file C-c C-c

• choose a table i.e prog-mode

• give a name to your snippet (I use the abrev key as the name)

try using the abrev key and press tab to expant your text.

Press C-s to search with I-search.

You can also try:

C-h f (or M-x describe-function) will show you the bindings for a command. C-h b (or M-x describe-bindings) will show you all bindings. C-h m (M-x describe-mode) is also handy to list bindings by mode. You might also try C-h k (M-x describe-key) to show what command is bound to a key.

See also helm swoop

There is also the projectile. To use projectile make sure you have created a .git repo into your project.

Press C-cpp to open projectile and search for projects

The word ,,BibTeX'' stands for a tool and a file format which are used to describe and process lists of references, mostly in conjunction with LaTeX documents_1.

Set up

First put the bellow code in your init.el ./emacs.d

;; Bibtex-latex export citation
(setq org-latex-pdf-process
      '("latexmk -pdflatex='pdflatex -interaction nonstopmode' -pdf -bibtex -f %f"))

Your next step is to create a .bib file with your citations and name it i.e: test-bib-refs

Examples of bibtex style references

[1]

@ARTICLE{2011ApJS..192....9T,
   author = {{Turk}, M.~J. and {Smith}, B.~D. and {Oishi}, J.~S. and {Skory}, S. and
     {Skillman}, S.~W. and {Abel}, T. and {Norman}, M.~L.},
    title = "{yt: A Multi-code Analysis Toolkit for Astrophysical Simulation Data}",
  journal = {The Astrophysical Journal Supplement Series},
archivePrefix = "arXiv",
   eprint = {1011.3514},
 primaryClass = "astro-ph.IM",
 keywords = {cosmology: theory, methods: data analysis, methods: numerical },
     year = 2011,
    month = jan,
   volume = 192,
      eid = {9},
    pages = {9},
      doi = {10.1088/0067-0049/192/1/9},
   adsurl = {http://adsabs.harvard.edu/abs/2011ApJS..192....9T},
  adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}

another example:

[2]

@InProceedings{ alejandro_weinstein-proc-scipy-2016,
  author    = { {A}lejandro {W}einstein and {W}ael {E}l-{D}eredy and {S}téren {C}habert and {M}yriam {F}uentes },
  title     = { {F}itting {H}uman {D}ecision {M}aking {M}odels using {P}ython },
  booktitle = { {P}roceedings of the 15th {P}ython in {S}cience {C}onference },
  pages     = { 1 - 6 },
  year      = { 2016 },
  editor    = { {S}ebastian {B}enthall and {S}cott {R}ostrup }
}

then use these latex commands inside your org file

Tests in org file

Latex

Example of citation

…this toolkit\cite{2011ApJS..192….9T}.

another example

…in python\cite{alejandro_weinstein-proc-scipy-2016}.

…

\printbibliography

*Note: put \printbibliography at the end so as to print the references section last on your text.

Then press C–c C-e to open org export dispatcher and then press l and o to export and open the pdf.

G++ Hello_World

Create a folder hello_world. cd in this folder and create a file hello_world.cpp

copy the below code and paste it into hello_world.cpp file

/*hello_world.cpp*/

#include <iostream>
using namespace std;

int main() {
    cout << "hello world!" << endl;
    return 0;
}

The next step is to create a makefile.

Use the bellow code.

=hello_world: hello_world.cpp

[TAB]g++ -Wall -g hello_world.cpp -o hello_world=

then go back (M-x b) to the hello_world.cpp and press C-x c to run the programm.

you will see a 'hello world' message.

Create and Run a programm with multiple source files

On emacs create a folder [use dired to the direction you want to create the folder and press Shift-+ and give a name] then dired to the folder and create 5 source files:

• main.cpp, which reffers to the main programm,

• Point.h, which is the header file for the Point class,

• Point.cpp, which is the implementation file for the Point class,

• Line.h, header file for the Line class,

• Line.cpp, which is the implementation file for the Line class.

Compiling source code

Compile its source code using the -c flag with the compiler.

i.e.

% g++ -c main.cpp
% g++ -c Point.cpp
% g++ -c Line.cpp

This process generates object files .o

The next step is to link the object files into an executable

% g++ -o main main.o Point.o Line.o

The makefile tells make how to compile and link a program.

A makefile consists of rules with the following shape:

target … : prerequisites …
        recipe
        …
        …

Create a makefile

open emacs and dired to the folder with the .cpp and .o files and create a makefile. This file genereates the executable main

The one part is to set the variables you need to use in a simple makefile. These are variables which specify the C++ compiler and linker, as well as, flags for the compiler, etc.

• Variables

Compiler

Comp = g++

Compiler Flags

CompFL = -Wall -g

Warnings Options

• -Wall: This enables all the warnings about constructions that some

users consider questionable, and that are easy to avoid (or modify to prevent the warning), even in conjunction with macros. This also enables some language-specific warnings described in C++ Dialect Options and Objective-C and Objective-C++ Dialect Options.

• -W or -Wextra: This enables some extra warning flags that are not enabled by Wall.

• -Werror: Make the specified warning into an error.

and the other part is to set the targets which can be files to be generated.

• Targets

  #Targets needed to bring the executable up to date

main: main.o Point.o Rectangle.o

[TAB] $(Comp) $(CompFL) -o main main.o Point.o Line.o

# If we haven't set the variables Comp and CompFL the code would be like # this: # g++ -Wall -g -o main main.o Point.o Line.o

# The main.o target can be written more simply

main.o: main.cpp Point.h Line.h

[TAB] $(Comp) $(CompFL) -c main.cpp

Point.o: Point.h

Line.o: Line.h Point.h

To comment a make file use #

After creating the makefile choose the main.cpp file and press C-x c and then hit enter to begin the compilation.

Clone the below repository to create a tetraedron and also to see an example of how to set up a makefile for OpenGL and GLUT framewroks.

SSH: git@github.com:Vasileios/Gpp.git

for more info see GNU makefile

• cmake Conways's Game of Life

• Compiling objects with g++ and SFML

• cmake

Click the below links to download and install sfml:

SFML download

SFML MAC osc

You can also read the instructions of building SFML with cmake:

Build SFML project

Clone this repository and run the famous cellular automata Conway's Game of Life.

On terminal, cd to the folder and use this command:

cmake -G"Xcode" -DSFML=/usr/local/include

clone this repo

https://github.com/scanberg/particle-skinning

Requirements - glm, assimp, qt5

brew install qt5
brew install glm
brew install assimp

open main.cpp on emacs and hit C-x c to make the program.