在 R 中绘制多条线(数据系列)，每条线都具有独特的颜色

我是 R 的新手，我有以下疑问:

I am fairly new to R and I have the following queries :

我正在尝试在 R 中生成一个包含多行(数据系列)的图.每条线都是一个类别，我希望它具有独特的颜色.

I am trying to generate a plot in R which has multiple lines (data series). Each of these lines is a category and I want it to have a unique color.

目前我的代码是这样设置的:

Currently my code is setup in this way :

首先，我正在创建一个空图:

First, I am creating an empty plot :

plot(1,type='n',xlim=c(1,10),ylim=c(0,max_y),xlab='ID', ylab='Frequency')

然后对于我的每个类别，我使用for"循环在这个空图中绘制线条，如下所示:

Then for each of my category, I am plotting lines in this empty plot using a "for" loop like so :

for (category in categories){
lines(data.frame.for.this.category, type='o', col=sample(rainbow(10)), lwd=2)
}

这里有 8 个类别，因此图中产生了 8 条线.如您所见，我正在尝试从 Rainbows() 函数中采样一种颜色，以便为每条线生成一种颜色.

There are 8 categories here, and so there are 8 lines produced in the plot. As you can see, I am trying to sample a color from the rainbows() function to generate a color for each line.

然而，当生成绘图时，我发现有多条线具有相同的颜色.例如，这 8 条线中有 3 条是绿色的.

However, when the plot is generated, I find that there are multiple lines which have the same color. For instance, 3 of those 8 lines have green color.

如何使这 8 条线中的每一条都具有独特的颜色?

How do I make each of these 8 lines have a unique color ?

另外，我如何在情节的传说中体现这种独特性?我试图查找 legend() 函数，但是不清楚我应该使用哪个参数来反映每个类别的这种独特颜色?

Also, how do I reflect this uniqueness in the legend of the plot ? I was trying to lookup the legend() function, however it was not clear which parameter I should use to reflect this unique color for each category ?

任何帮助或建议将不胜感激.

Any help or suggestions would be much appreciated.