Ticker labeling

[wilk...@clarkson.edu]

I'm trying to put a time series into a dygraph. I have the axisLabelFormatter working, which displays the MM/DD/yyyy HH:mm:ss on each tick. I set the ticker function to have a granularity of Dygraph.TWO_MINUTELY, which correctly sets the ticks in two minute intervals.  

Here's my code for the ticker function and axisLabelFormatter:

ticker: function (a, b, pixels, opts, dygraph, vals) {
    return Dygraph.getDateAxis(a, b, Dygraph.TWO_MINUTELY, opts, dygraph);
axisLabelFormatter: function(date,gran,opts){

axisLabelFormatter: function(date,gran,opts){
        return Dygraph.dateAxisLabelFormatter(date,gran,opts);
}

Is there a way to only label some of the ticks, not all of them? I have found examples of the ticker function manually labeling each tick with a function like this: 

ticker: function(min, max, pixels) {
  return [
    { v: 0*24 + 24 },
    { label_v: 0*24 + 12, label: 'Sun' },
    { v: 1*24 + 24 },
    { label_v: 1*24 + 12, label: 'Mon' }
]
}

(http://dygraphs.com/tests/label_v.html)

It would be nice to have the dygraph only label the first and last ticks, with the start and end dates (and possibly the middle tick). Is this possible without having to set values and labels for each tick?

[Dan Vanderkam]

try calling the default formatter and modifying its results to your liking?

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