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Setting up your system

Video walkthrough:

We provide a step-by-step instruction video which covers everything you need to do get started with CBM101. Also, if you are new to computer science, we strongly recommend you start by watching this video on how to navigate the command terminal.

Anaconda:

We recommend installing Python via the Anaconda Distribution. Be sure to use the "Python 3.6.x" version or later. We will use the Conda Package Management System within the Anaconda Distribution. From the documentation:

Conda is an open source package management system and environment management system that runs on Windows, macOS and Linux. Conda quickly installs, runs and updates packages and their dependencies. Conda easily creates, saves, loads and switches between environments on your local computer.

After the installation run python --version in a terminal window (in "Anaconda Prompt" if you are using Windows). If the output show "Python 3.6.x" or later (and "Anaconda") you are good to go.

GitHub:

The course code is hosted on the code-sharing platform GitHub (where you now are reading this). If you do not have a GitHub account already you should make one now. We recommend that you are using the platform for you own projects during the course. https://github.com/join.

Install and test the course environment:

After you have successfully installed Anaconda, go through the following steps (if you are using Windows, be at the "Anaconda Prompt").

Install Git:

conda install git

Download the repository:

git clone https://github.com/oercompbiomed/CBM101
cd CBM101

Configure the Python-environment:

NB! Before executing the next command, we recommend you temporarily deactivate your antivirus (AV) software. Some software conflates python.exe with a virus (IDP.generic), and will corrupt your install. If your AV gives this warning, delete your environment (conda remove --name cbm101 --all --yes), deactivate the AV and run the commands below.

conda env update

You should now reactivate the AV.

Activate the environment:

conda activate cbm101

If you are using Linux or MacOS and the command above fails, type

source ~/.bash_profile

and try conda activate cbm101 again. If this fails, activate the environment by typing source activate cbm101 instead.

Install a Jupyter kernel:

python -m ipykernel install --user --name cbm101 --display-name "CBM101"

Test you installation:

Go through the notebook 1.0-python-basics.ipynb in the B_Python_and_friends directory:

cd B_Python_and_friends
jupyter notebook

(Tip: you can auto complete the name of a file/directory by pressing Tab, so you won't have to write out the full name.) Jupyter notebook only supports Firefox, Safari and Chrome. Unless you have set one of these as your default browser, you should do so, or alternatively you can run jupyter notebook --no-browser and paste the link into a supported browser. You can also use JupyterLab: jupyter lab.

Update:

The code and environment will be updated during the course. Run the following commands regularly:

  • Update code: git pull
  • Update environment:
conda activate cbm101
conda env update

Overwriting local changes

Sometimes git pull will throw an error message as it would overwrite any local changes you have made. This problem can be solved by: i) Make a copy of the notebook (.ipynb) files before working through them. OR ii)

git fetch --all
git reset --hard origin/master

WARNING: option ii) will permanently delete any personal changes you have made to any of the original files (but not the copied ones).

Jupyter notebooks using R

Installation of libraries and necessary software

These notebooks requires an R kernel to run the R scripts. We recommend to install the latest R version (https://www.r-project.org/), open an R console and then follow the instructions in https://irkernel.github.io/installation.

If you are on Windows,

at the local CBM101 root directory, and have installed R version 3.5.1 (say), type:

CBM101>conda deactivate
CBM101>"C:\Program Files\R\R-3.5.1\bin\R.exe"

Now you got the R command prompt >. Then type

> install.packages('IRkernel')
> IRkernel::installspec()
> quit()

If you are on Mac,

at the local CBM101 root directory, and have installed R version 3.6.0 (say), type:

CBM101>conda deactivate
CBM101>/usr/local/bin/R

Now you got the R command prompt >. Then type
> install.packages('IRkernel')
> IRkernel::installspec()
> quit()

If you are on Linux,

at the local CBM101 root directory, and have installed R version 3.6.1 (say), type:

CBM101>conda deactivate
CBM101>/usr/bin/R

Now you got the R command prompt >. Then type
> install.packages('IRkernel')
> IRkernel::installspec()
> quit()

Then: Go to the E_Biostatistics folder, and start the Jupyter notebook, i.e.

CBM101/E_Biostatistics>jupyter notebook

and you will load the R kernel when opening an .ipynb notebook, say ProbsAndDistr.ipynb in the Probabilities-and-Distributions folder.

Using Anaconda for the R programming language in Jupyter Notebookhttps see: https://docs.anaconda.com/anaconda/navigator/tutorials/r-lang

More features and a user-friendly environment to run R scripts outside jupyter are available through RStudio

Install the necessary libraries (only needed once) by executing (shift-enter), e.g.`

install.packages("MASS", repos='http://cran.us.r-project.org')

Edit and live-preview markdown files, e.g. README.md

The Atom text editor has a live-preview mode for markdown files. The keyboard shortcut is CTRL+SHIFT+M.

Install Jupyter/Python on Android

  • Download Pydroid3 app from Play store (note: Pydroid uses ads)
  • Run the app (this will install Python)
  • Click on the 3 bars button (menu), then choose “PIP” (library installer), there is a search menu, typer “Jupyter” then click on Install
  • You might be asked to install the Python repository plugin if it has not been done before: do it (possible to uninstall it after installing Jupyter)
  • Once the installation of Jupyter is complete, go back to PIP, click again on the 3 bar button (menu) and run “terminal”. In the terminal type “jupyter notebook”, you’re done!