R图例：减少图例列之间的间距-Rplotlegend:Reducespacebetweenlegendcolumns

I am using vegan library to make some plots, with this code:

我使用纯素库来制作一些图，使用以下代码：

raremax <- min(colSums(mydata))
col <- palette()
lty <- c("solid", "dashed", "longdash", "dotdash")
pars <- expand.grid(col = col, lty = lty, stringsAsFactors = FALSE)

out <- with(pars[1:18, ], rarecurve(mydata, step = 100, sample = raremax, 
       cex =0.6, ylab="OTUs", label=F, col=col, lty=lty, lwd=2))

Then I add a legend using this code:

然后我使用以下代码添加图例：

legend("bottomright", names(mydata), col=pars[1:18,1], lty= pars[1:18,2], 
       lwd=2, cex=0.5, xjust=1, ncol=2, x.intersp=0.5, y.intersp=0.5, bg="white")

The resulting graph looks like this:

结果图如下所示：

I would like to reduce the space between legend columns, also reducing the size of the legend box, but I can't find a way to do that.

我想减少图例列之间的空间，也减少了图例框的大小，但我找不到办法做到这一点。

Anyone could provide me some help?

有人能给我一些帮助吗？

1 个解决方案