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gibson:teaching:fall-2016:math753:installing-julia [2016/08/31 09:07]
gibson [Julia notebooks]
gibson:teaching:fall-2016:math753:installing-julia [2016/09/01 07:22]
gibson [Julia notebooks]
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-====== Julia notebooks ====== 
- 
-A Julia notebook is a system that combines mathematical text, executable Julia code, and graphical output within a web browser. If you have Julia running on a laptop or UNH computer, you can start a notebook as follows 
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-Note: you will have to do all these steps //only the first time// you run a Julia notebook. After that you can just start with step 5, ''​using IJulia''​. ​ 
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-**1.** Download a Julia notebook file to your computer. Let's start with notebooks from [[http://​sistemas.fciencias.unam.mx/​~dsanders/​|David Sanders]]'​ [[https://​github.com/​dpsanders/​hands_on_julia|Hands-on Julia]] tutorial. You can downlad them from the previous link or get them here:  
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-  * {{:​gibson:​teaching:​fall-2016:​math753:​hands_on_julia:​1._numbers_variables_and_basic_functions.ipynb|1. Numbers, variables and basic functions.ipyn}} 
-  * {{:​gibson:​teaching:​fall-2016:​math753:​hands_on_julia:​2._iteration_-_ranges_vectors_and_conditionals.ipynb|2. Iteration - ranges, vectors and conditionals.ipynb}} 
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-**2.** Start the Julia REPL by clicking the executable or directly from the command line.  
-<​code>​ 
-               _ 
-   ​_ ​      _ _(_)_     ​| ​ A fresh approach to technical computing 
-  (_)     | (_) (_)    |  Documentation:​ http://​docs.julialang.org 
-   _ _   _| |_  __ _   ​| ​ Type "?​help"​ for help. 
-  | | | | | | |/ _` |  | 
-  | | |_| | | | (_| |  |  Version 0.4.6 (2016-06-19 17:16 UTC) 
- _/ |\__'​_|_|_|\__'​_| ​ |  Official http://​julialang.org/​ release 
-|__/                   ​| ​ x86_64-unknown-linux-gnu 
- 
-julia> ​ 
-</​code>​ 
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-**3.** At the Julia prompt, type ''​Pkg.add("​IJulia"​)''​. This tells Julia to download and install the IJulia notebook software onto the computer. ​ 
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-<code julia> 
-julia> Pkg.add("​IJulia"​) 
-INFO: Nothing to be done                                                                        ​ 
-INFO: METADATA is out-of-date — you may not have the latest version of IJulia ​                   
-INFO: Use `Pkg.update()` to get the latest versions of your packages ​                           ​ 
-julia> 
-</​code> ​                                               
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-**4.** At the Julia prompt, type ''​Pkg.update()''​. This tells Julia to download and install any required software updates. This might take a while and print out lots of download & install information. 
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-<​code>​ 
-julia> Pkg.update() 
-INFO: Updating METADATA... 
-INFO: Updating cache of ColorTypes... 
-INFO: Updating cache of BinDeps... 
-INFO: Updating cache of ZMQ... 
-INFO: Updating cache of IJulia... 
-INFO: Updating cache of URIParser... 
-INFO: Updating cache of Conda... 
-INFO: Updating cache of HttpCommon... 
-....and many more such messages... 
- 
-julia> 
-</​code>​ 
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-**5.** At the Julia prompt, type ''​using IJulia''​. This tells Julia to load the IJulia module into your active Julia session. ​ 
-<​code>​ 
-julia> using IJulia 
-INFO: Recompiling stale cache file /​home/​gibson/​.julia/​lib/​v0.4/​IJulia.ji for module IJulia. 
-INFO: Recompiling stale cache file /​home/​gibson/​.julia/​lib/​v0.4/​ZMQ.ji for module ZMQ. 
-INFO: Recompiling stale cache file /​home/​gibson/​.julia/​lib/​v0.4/​Nettle.ji for module Nettle. 
- 
-julia> ​ 
-</​code>​ 
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-**6.** At the Julia prompt, type ''​notebook()''​. This tells Julia to start an IJulia notebook in a browser, either starting up a new browser, if you don't have one running, or as a new tab in an existing browser. 
- 
-<​code>​ 
-julia> notebook() 
-</​code>​ 
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-The browser window should look like this, listing the Julia notebooks you downloaded. 
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- {{ :​gibson:​teaching:​fall-2016:​math753:​hands_on_julia:​jupyter1.jpg?​800 |}} 
- 
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-**6.** Click on "​Numbers,​ variables, and basic functions.ipynb"​ in the browser. That'​ll start the interactive Julia notebook session. ​ 
- 
- {{ :​gibson:​teaching:​fall-2016:​math753:​hands_on_julia:​jupyter2.jpg?​800 |}} 
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-**7.** At this point you can click on and modify anything in the Julia notebook. Try clicking on the line that read ''​typeof(10)''​ and then hitting "​shift-return"​ or "​shift-enter"​ to execute the ''​typeof(10)''​ statement. i.e. to make Julia evaluate the expression ''​typeof(10)''​ and respond with the result. 
  
  
gibson/teaching/fall-2016/math753/installing-julia.txt · Last modified: 2016/09/01 07:23 by gibson