Specifying number of ticks about gadfly.jl HOT 6 CLOSED

you can specify exactly where to put ticks with Guide.xticks: http://gadflyjl.org/stable/gallery/guides/#[Guide.xticks](@ref),-[Guide.yticks](@ref)

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ideally, at some point it would be nice to hoist granularity_weight and friends into the Theme struct and/or kwargs to Guide.{x,y}ticks.

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@bjarthur Thanks for your reply! I had replied to a StackExchange with that answer, but I was wondering/hoping there would be something better to tell them.

Alas! Oh well! Thank you anyway

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i'd forgotten that granularity_weight can be specified in Stat.xticks:

help?> Stat.xticks
  Stat.xticks[(; ticks=:auto, granularity_weight=1/4, simplicity_weight=1/6,
              coverage_weight=1/3, niceness_weight=1/4)]

  Compute an appealing set of x-ticks that encompass the data by transforming the x, xmin,
  xmax, xintercept and xend aesthetics into the xtick and xgrid aesthetics. ticks is a vector
  of desired values, or :auto to indicate they should be computed. the importance of having a
  reasonable number of ticks is specified with granularity_weight; of including zero with
  simplicity_weight; of tightly fitting the span of the data with coverage_weight; and of
  having a nice numbering with niceness_weight.

it doesn't provide a way to directly specify the number of ticks though.

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Could this be reopened? I think that a good interface would be to allow the user to provide an interval for Gadfly to choose the number of tick marks from, for example: there should be no less than four ticks and no more than ten.

My issue in particular is that some of my plots have only a single tick mark on the x-axis.

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Scale.x_continuous actually accepts the parameters minticks and maxticks, and those are actually documented. The parameters don't seem to affect my plots though, I think that Gadfly maybe just ignores them for some reason?

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