使用ggplot2在较小的中断处放置轴标签 [英] Placement of axis labels at minor breaks with ggplot2

问题描述

我使用ggplot2来做一些基因组数据的绘图，所以基本格式是有一个染色体和一个位置。我将这些位置转换为连续的尺度，然后将这些中断置于染色体的边界处：

scale_x_continuous（Genome Position ，break = c（0，cumsum（chromosome_length）））

看起来很棒，就实际绘图而言，然后将标记放在染色体的起始和末端。我希望它们在每条染色体上居中，在默认情况下绘制小断点的位置。

这可能吗？

解决方案

这是怎么回事？

  break <-c （0，cumsum（chromosome_length））
 scale_x_continuous（Genome Position，breaks = break + 0.5，labels = breaks）
  

I am using ggplot2 to do some plotting of genomic data, so the basic format is that there is a chromosome and a position along it. I convert the positions to be on a continuous scale, then put the breaks at the boundaries of the chromosomes with:

scale_x_continuous("Genome Position", breaks = c(0, cumsum(chromosome_length)))

That looks great, as far as the actual plotting is concerned, but the labels are then put at the start and end of the chromosomes. I would like them to be centered along each chromosome, at the position where the minor break is drawn by default.

Is this possible?

解决方案

How about this?

breaks <- c(0, cumsum(chromosome_length))
scale_x_continuous("Genome Position", breaks = breaks + 0.5, labels = breaks)

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