Micah P. Dombrowski / Jan 14 2018
with Andrea Amantini

Julia Template

This article can act as a starting point for any basic Julia article. It has cells to accomplish some basic setup and programming tasks, as well as a few more complex ones. Just Remix and go!

For explanations of what's going on, see this article on Bash setup and this one on Juila setup and coding.

1.
System setup

apt-get update >> /dev/null
apt-get install -y fortune cowsay
/usr/games/fortune | /usr/games/cowsay
5.3s



























































pwd
ls -al
mkdir -p ~/.keras
echo '{
    "epsilon": 1e-07, 
    "image_data_format": "channels_last", 
    "backend": "cntk", 
    "floatx": "float32" 
}' > ~/.keras/keras.json
0.2s































# curl -O https://nextjournal.com/images/logo.svg
wget https://nextjournal.com/images/logo.svg

cp ~/.keras/keras.json /results/
cp logo.svg /results/
0.5s
keras.json
Download

2.
Installing Julia packages

Pkg.pin("Plots") # Keeps update from breaking it.
Pkg.update()
Pkg.add("Primes")
Pkg.status()
118.9s

3.
Data intake

cubic.csv
Download
data = readcsv(cubic.csv)
2.7s
# str = open(readstring, ) # waiting on bugfix
str = open(readstring, "//.keras/keras.json")
0.3s
print(read /results file.str)
0.4s

4.
Calculations

using Primes
2.4s



primes(1000)
0.6s
data = [x*(-1)^(i+1) for (i,x) in enumerate(read uploaded file.data[1])]
0.8s

5.
Plotting

Plots.scatter(read uploaded file.data,
  title="Cubic Function", xlab="x", ylab="f(x)",
  legend=:none
)
0.8s
Plots.gr() # switch backend

Plots.scatter(read uploaded file.data,
  title="Cubic Function", xlab="x", ylab="f(x)",
  legend=:none
)
10.4s









var data = modify file data.data

plottypes = ['lines','markers']

var traces = plottypes.map(function(ptype) {
  return { type: 'scatter', mode: ptype,
    name: ptype,
    x: [...Array(401).keys()],
    y: data
  }
})

var layout = { title: 'Split Cubic Function',
  xaxis: { title: 'Year' },
  yaxis: { title: 'Temperature [C]' }
}

Nextjournal.plot(traces, layout)