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  "Title": "Plotting Ultrasound Tongue Traces",
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  "Description": "Plots traced ultrasound tongue imaging data according to a\npolar coordinate system. There is currently support for\nplotting means and standard deviations of each category's\ntrace; Smoothing Splines Analysis of Variance (SSANOVA) could\nbe implemented as well.  The origin of the polar coordinates\nmay be defined manually or automatically determined based on\ndifferent algorithms. Points for each category can be split\ninto two groups (anterior and posterior) at the point of\nmaximum curvature of each trace. User can specify rays to\nintersect various parts of the tongue; intersections along\nthese rays serve as input for a pairwise t-test to measure\nsignificant contrasts between segments. Currently\n'ultrapolaRplot' supports ultrasound tongue imaging trace data\nfrom 'UltraTrace'\n(<https://github.com/SwatPhonLab/UltraTrace>). 'UltraTrace' is\ncapable of importing data from Articulate Instruments AAA.\n'read_textgrid.R' is required for opening TextGrids to\ndetermine category and alignment information of ultrasound\ntraces.",
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