more robust plotting functions

[jonorthwash]

Assuming for now that filtering of categories is still happening in loadTraces():

1. plot all categories in tier 'cons' as separate lines:

   rawTraces <- loadTraces("../palatals/", 'cons')
   # or
   rawTraces <- loadTraces("../palatals/", tiername='cons')

2. plot all 'ɫ' and 'n' from any teir:

   rawTraces <- loadTraces("../palatals/", "", c('ɫ', 'n'))
   # or
   rawTraces <- loadTraces("../palatals/", tiername="", categories=c('ɫ', 'n'))

3. plot just ɫ and n categories in tier 'cons':

   rawTraces <- loadTraces("../palatals/", 'cons', c('ɫ', 'n'))
   # pr
   rawTraces <- loadTraces("../palatals/", tiername='cons', categories=c('ɫ', 'n'))

   • specifying tiername as a list, e.g. tiername=c('cons'), is okay too
   • specifying categories as a list of a list, e.g. categories=list(c('ɫ', 'n')), is okay too

4. plot all categories in tier 'cons' as single line:

   rawTraces <- loadTraces("../palatals/", 'cons', "")
   # or
   rawTraces <- loadTraces("../palatals/", tiername='cons', mergecategories=TRUE)

5. plot just ɫ and n categories from tier 'cons' (explicit specification of tier for both categories):

# rawTraces <- loadTraces("../palatals/", c('cons', 'cons'), c('ɫ', 'n'))
# →
rawTraces <- loadTraces("../palatals/", 'cons', c('ɫ', 'n'))
# or
rawTraces <- loadTraces("../palatals/", tiername='cons', categories=c('ɫ', 'n'))

• specifying tiername as a list, e.g. tiername=c('cons'), is okay too
• specifying categories as a list of a list, e.g. categories=list(c('ɫ', 'n')), is okay too

6. plot ɫ and n in tier 'cons' together as one line and lʲ and nʲ in teir 'cons' together as another line

rawTraces <- loadTraces("../palatals/", 'cons', list(c('ɫ', 'n'), c('lʲ', 'nʲ')), mergecategories=TRUE)
# or
rawTraces <- loadTraces("../palatals/", tiername='cons', categories=list(c('ɫ', 'n'), c('lʲ', 'nʲ')), mergecategories=c(TRUE, TRUE))

7. plot ɫ (from 'cons' tier, 'tongue' layer) and n (same) and palate (layer, regardless of tier or label) traces as separate lines:

# rawTraces <- loadTraces("../palatals/", c('cons', 'cons' ''), c('ɫ', 'n', ''), layer=c('tongue', 'tongue', 'palate'))
# or
# rawTraces <- loadTraces("../palatals/", tiername=c('cons', 'cons' ''), categories=c('ɫ', 'n', ''), layer=c('tongue', 'tongue', 'palate'))
# →
rawTraces <- loadTraces("../palatals/", tiername=c('cons', ''), categories=list(c('ɫ', 'n'), ''), layer=c('tongue', 'palate'))

for all of these

• determine how many elements/plotted lines based on contents of categories
• convert single string to list (repeating if needed)

[jonorthwash]

• [x] tiername accepts a string, or a list;
  • [x] if a string, it assumes same tier name for all categories
  • [x] if a list, it should be the same length as the list of categories;
  • [x] if empty, data from all tiers is used to match specified categories
• [x] layer accepts a string, or a list;
  • [x] if a string, it assumes the same layer for all categories;
  • [x] if a list, it should be the same length as the list of categories;
  • [ ] if empty, data from all layers is used to match specified categories
• [x] categories accepts a list of individual categories to plot, or a list of lists;
  • [ ] if a list is an element of categories, then either:
  • [ ] all categories in that list are plotted together as if they were a single category if the corresponding index of mergecategories is TRUE; or
  • [x] if the corresponding index of mergecategories is FALSE (or unspecified), then this is just a mechanism to allow using a single tier+layer combination for several categories
  • [x] if not specified, all traces matching non-empty intervals in specified (or all if unspecified) tiers are plotted and assigned to categories based on tier labels
  • [x] if empty ('', including as a list element), all traces (matching layer if specified; otherwise all layers) are plotted together as a single category