D3.js:显示有限数量的滴答声 [英] D3.js: display limited number of ticks

问题描述

我正在尝试使用 d3.ticks.根据文档，我应该能够限制数量轴上显示的刻度数.

I'm trying to use d3.ticks. According to the documentation, I should be able to restrict the number of ticks displayed on the axis.

然而，这似乎根本不限制滴答数:

However, this doesn't seem to restrict the number of ticks at all:

xAxis = d3.svg.axis().scale(xScale).orient("bottom").ticks(2)

是不是因为我的秤是序数?

Is it because my scale is ordinal?

JSFiddle 在这里:http://jsfiddle.net/samselikoff/9tfD2/1/

JSFiddle here: http://jsfiddle.net/samselikoff/9tfD2/1/

推荐答案

axis.ticks 仅在底层 scale 实现了 ticks 函数时才有效，而序数 scales 没有.默认情况下，序数刻度的轴刻度由刻度的域组成，但您可以通过使用 axis.tickValues.

axis.ticks only works when the underlying scale implements a ticks function, which ordinal scales do not. By default, the axis ticks for an ordinal scale are comprised of the scale's domain, but you can override this by supplying explicit tick values with axis.tickValues.

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