Getting Started with Julia

Using Gadfly on data

Let's apply Gadfly to visualize the histogram we made in the Using DataFrames section of Chapter 8, I/O, Networking, and Parallel Computing, when examining the quality of wine samples:

# see code in Chapter 8\DataFrames.jl:
using Gadfly
p = plot(df_quality, x="qual", y="no",
         Geom.bar(),Guide.title("Class distributions (\"quality\")"))
draw(PNG(14cm,10cm),p)

This produces the following output:

Here is an example to explore medical data: medical.csv is a file that contains the following columns: IX, Sex, Age, sBP, dBP, Drink, and BMI (IX is a number for each data line, sBP and dBP are systolic and diastolic blood pressure, Drink ...