del lecture 2 for some silly mistake i made

README.md

@@ -91,17 +91,19 @@ Corrections or suggestions? Please file a [GitHub issue](https://github.com/jpha
 
 ## Using Class Software Resources
 
-1. Install [Git](https://git-scm.com/downloads), [Graphviz](https://www.graphviz.org/) and Java. They must all be *added to your system path.*
+### Ubuntu Linux
+
+1. Install [Git](https://git-scm.com/downloads) (`$ sudo apt-get install git`), [Graphviz](https://www.graphviz.org/) (`$ sudo apt-get install graphviz`) and Java (`$ sudo apt-get install openjdk-8-jdk`). They must all be *added to your system path.*
 
 2. Clone this repository with the examples: `$ git clone https://github.com/jphall663/GWU_rml.git`
 
-3. Install Anaconda Python 5.1.0 from the [Anaconda archives](https://repo.continuum.io/archive/) and *add it to your system path.*
+3. Install Anaconda Python 5.1.0 from the [Anaconda archives](https://repo.continuum.io/archive/) (Anaconda3-5.1.0-Linux-x86_64.sh) and *add it to your system path.* (This means when you type `$ python` at the command prompt, you will start a Python 3.6 session.)
 
 4. Install `virtualenv`: `$ pip install virtualenv` 
 
 5. Change directories into the cloned repository: `$ cd GWU_rml`
 
-6. Create a Python 3.6 virtual environment: `$ virtualenv -p /path/to/anaconda3/bin/python3.6 env_rml` (`/path/to/anaconda3/bin/python3.6` is not a real path. You must replace it with the path to `python3.6` on your system. For Windows users this is often in the `Anaconda3/Scripts` directory. If you get stuck, try these links: [Pip and Virtualenv on Windows](https://programwithus.com/learn-to-code/Pip-and-virtualenv-on-Windows/), [Mac Setup: Virtualenv](https://sourabhbajaj.com/mac-setup/Python/virtualenv.html). )
+6. Create a Python 3.6 virtual environment: `$ virtualenv -p /path/to/anaconda3/bin/python3.6 env_rml` 
 
 7. Activate the virtual environment: `$ source env_rml/bin/activate`
 
@@ -110,3 +112,44 @@ Corrections or suggestions? Please file a [GitHub issue](https://github.com/jpha
 9. Start Jupyter: `$ jupyter notebook`
 
 10. When you are finished, deactivate the environment: `$ deactivate`.
+
+### Mac
+
+**Preliminaries:**
+
+* Install [`homebrew`](https://brew.sh/): `$ /bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install.sh)"`
+
+* Install Java:
+
+```
+brew tap adoptopenjdk/openjdk
+brew cask install adoptopenjdk8
+```
+
+* [Install Mac command line developer tools](https://www.cnet.com/how-to/install-command-line-developer-tools-in-os-x/)
+
+* Install Git: `$ brew install git`
+
+1. Clone this repository with the examples: `$ git clone https://github.com/jphall663/GWU_rml.git`
+
+2. Install Anaconda Python 5.1.0 from the [Anaconda archives](https://repo.continuum.io/archive/) (Anaconda3-5.1.0-MacOSX-x86_64.pkg) and *add it to your system path.* (This means when you type `$ python` at the command prompt, you will start a Python 3.6 session. You should probably check for a line like this `export PATH="/Users/phall/anaconda/bin:$PATH"` in your `.bash_profile` file. You may also need to close and restart your terminal session.)
+
+3. Install `virtualenv`: `$ pip install virtualenv` 
+
+4. Change directories into the cloned repository: `$ cd GWU_rml`
+
+5. Create a Python 3.6 virtual environment: `$ virtualenv -p /path/to/anaconda3/bin/python3.6 env_rml` (`/path/to/anaconda3/bin/python3.6` is not a real path. You must replace it with the path to `python3.6` on your system. This can be as simple as `$ virtualenv -p python3.6 env_rml`.) 
+
+6. Activate the virtual environment: `$ source env_rml/bin/activate`
+
+7. Install the correct packages for the example notebooks: `$ pip install -r requirements.txt`
+
+8. Start Jupyter: `$ jupyter notebook`
+
+9. When you are finished, deactivate the environment: `$ deactivate`
+
+If you get stuck, try this link: [Mac Setup: Virtualenv](https://sourabhbajaj.com/mac-setup/Python/virtualenv.html).
+
+### Windows Troubleshooting 
+
+If you get stuck, try this link: [Pip and Virtualenv on Windows](https://programwithus.com/learn-to-code/Pip-and-virtualenv-on-Windows/).