List of Listings

Chapter 2. Essential gnuplot

Listing 2.1. A typical data file: stock prices over time

Listing 2.2. The complete workflow to generate a PNG file from gnuplot

Listing 2.3. A useful script to export the current plot to file

Chapter 3. Working with data

Listing 3.1. A data file containing several sets

Listing 3.2. A data file containing interleaved data sets

Listing 3.3. An unsorted data file: the years are not in ascending order

Listing 3.4. A messy data file

Listing 3.5. Examples of user-defined variables (constants)

Listing 3.6. Examples of user-defined functions

Chapter 4. Practical matters

Listing 4.1. A data file containing a missing value

Listing 4.2. Strings in data files need only be quoted if they contain whitespace.

Listing 4.3. Printing strings from the data file using with labels

Listing 4.4. Reading x axis tic labels from file using xticlabels()

Listing 4.5. Reading text for the graph’s key from the data file

Listing 4.6. A text file that can be plotted by gnuplot

Listing 4.7. Plotting a text file (the Unix password file) with gnuplot

Listing 4.8. Typical output from the command: history quiet 5

Chapter 5. Doing it with style

Listing 5.1. Data for figure 5.6 and figure 5.7

Listing 5.2. Data for figure 5.14

Listing 5.3. Defining and using custom styles—see figure 5.15

Chapter 6. Decorations

Listing 6.1. The set of commands used to create figure 6.1

Listing 6.2. Commands used to generate the double-feathered arrow in figure 6.4

Foreword

Foreword