fbchow

function powerline_precmd() {
    PS1="$(powerline-shell --shell zsh $?)"
}

function install_powerline_precmd() {
  for s in "${precmd_functions[@]}"; do
    if [ "$s" = "powerline_precmd" ]; then
      return
    fi
  done

fbchow

# run `bash brew-upkeep.sh` or `sh brew-upkeep.sh` in your terminal (if you have permissions to run shell scripts)

# maintain brew packages
brew update
brew upgrade
brew doctor
brew cleanup

# update apps/fonts downloaded from cask
brew cask upgrade

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# https://conda.io/docs/user-guide/tasks/manage-environments.html

conda create --name myenv

# how install a sepcific version of package
# https://github.com/lopatovsky/HMMs/issues/4
conda install cython=0.25.2

conda env list

fbchow

cd /etc/shells

You will need to add:
  /usr/local/bin/fish
to /etc/shells.


Then run:
  chsh -s /usr/local/bin/fish
to make fish your default shell.

fbchow

Terminal:
$conda create --name tensorflow
$source activate tensorflow
$pip install tensorflow

Check :
$python
import tensorflow as tf

fbchow

how to get the size of everything in your file
du -sh *

how to see the first N lines of a file
cat -N file.txt

how to see the last N lines of a file
head -N file.txt

fbchow

Collecting the bits & bytes from https://rstudio-pubs-static.s3.amazonaws.com/18858_0c289c260a574ea08c0f10b944abc883.html

stats notation: 
“We fit a linear model with terms for age, sex” versus \( Y_i = \alpha + \beta_a A_i + \beta_s S_i + \epsilon_i \)

concise:
“We estimated the intercept to be 3.3” versus \( \hat{\alpha}=3.3 \).

#How to write math on a separate line

fbchow

I always forget the exacty syntax for copying & moving files, especially when dealing with a remote Linux server. And I had wrote some documentation years ago but lost it (so much for persistent storage!). So here's some notes:

Change into the directory you want to download the files
cd /home/dir_to_dump_file_in 

Log onto server using Safe File Transfer Protocol--just like how you would "ssh" into the Linux server
sftp homersimpson@sprinfielduniversity.edu
password: ilovemarge

Obtain the files from the Linux server on to your local server

fbchow

Job title – Data Scientist

Basic Qualifications

1. Bachelor’s Degree in Mathematics, Technical Science, Computer Science (or equivalent) or Engineering
2. Minimum 1 year programming experience in at least one item from each:

• R, SAS,Mathematica, MATLAB, Sagemath
• Python, Ruby, Perl, Java, Scala
• Linux
• Bash scripting including sed, awk, cut, uniq, sort, tr

fbchow

from collections import Counter
from random import choice
import re


class Cup:
    """ A class defining a cup that will hold the words that we will pull out """
    def __init__(self):
        self.next_word = Counter() # will keep track of how many times a word appears in a cup