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I am doing an experiment on Mandarin tone discrimantion and I would like to plot the tone contours of the speakers.
I know how to do it in Praat for every tone separately, (View & Edit -> Pitch -> Draw Visible pitch contour) but I'd rather have all 4 utterances of a speaker in a single graph.
To give you an example of what I would like to achieve please see this. 
Does anybody know a way to do this in Praat or by using another software (e.g. R)?
I assume you have a collection of Praat sound objects "s1" to "s12" corresponding to specific recordings. For each sound object, create a pitch object using Analyze periodicity. Then select the pitch objects and Draw then, and they are drawn together in the same drawing window.
This is probably better done by a script. The commands for drawing, as you would put into the script, are along the lines of
selectObject: "Pitch s1"
plusObject: "Pitch s2"
plusObject: "Pitch s3"
Draw: 0, 0, 0, 500, "no"
You can also do this within each Sound Editor window under Pitch - Draw Visible Pitch Contour (uncheck "Erase first"). However, the graph in the paper is a different thing – it's a pitch track of a 4 single utterances by one speaker, not multiple tone patterns and not from multiple speakers. Presumably you want the individual lines to be visually distinct, so you need to include some "pen" modification. The "Pen" menu in the Picture window gives you various options for that: read this page for more details. There are 4 styles, any number of widths and 16 colors.
