Conditional X Axis Labeling

http://stackoverflow.com/questions/25414857/roassal-conditional-x-axis-labeling

In my chart, the x axis represents the Date. I'd like to only label the first day of a month. Specifying a number of ticks is problematic because they can be fractional.

What I'm looking for is something like:

someRoassalObject
  if: [ :point | point date dayOfMonth = 1 ]
  label: [ :point | point date mmddyyyy ]
(where points are my domain objects that respond to #date)

I did the following quick and dirty hack in the mean time:

b axisConfiguration
        labelConvertion: [ :x | (Date julianDayNumber: x rounded) mmddyyyy ].

Hi Sean,

I have the same problem. However, I have no better solution than the one you propose (using the julianDay).

The problem is the following, if I want to have a set values ranging from A to B along a portion of 100 pixels. Each label for tick I is obtained with something like A +(B - A) * I.
Unfortunately, this kind of arithmetic works well with numbers, but not with dates. I therefore have no immediate solution. Charting is difficult. I am sure we will come with a reliable solution soon. Having date on the X-axis is important.

Alexandre


On Aug 23, 2014, at 7:57 AM, Sean P. DeNigris <[hidden email]> wrote:

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Alexandre Bergel  http://www.bergel.eu
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