- Put the plotting functionality of plotIP.go into a Go package and use that package to rewrite both plotIP.go and plotData.go.
- Review the Go code of ddGo.go from Chapter 6, File Input and Output, in order to print information about its progress when receiving a SIGINFO signal.
- Change the Go code of cat.go to add support for multiple input files.
- Change the code of plotData.go in order to print gridlines to the generated image.
- Change the code of plotData.go in order to leave a little space between the bars of the plot.
- Try to make the UNIXshell.go program a little better by adding new features to it.
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