[英]Passing parameter to function in add.expr inside heatmap.2
I'm generating clustering heatmap with heatmap.2
function (R gplots package). 我正在使用
heatmap.2
函数(R gplots软件包)生成集群热图。 I'd like to add a vertical line(s) onto the image at variable location(s) using add.expr
parameter. 我想使用
add.expr
参数在图像的可变位置添加一条垂直线。
For example, 例如,
xx=replicate(10, rnorm(10)) # some random matrix
heatmap.2(xx, trace="none",
add.expr=abline(v=c(3.5,6.5), lwd=3))
This works great. 这很好。 The problem is it doesn't work if I pass the lines location as a variable:
问题是,如果我将行位置作为变量传递,它将不起作用:
linePosition = c(3.5,6.5)
heatmap.2(...,
add.expr=abline(v=linePosition, lwd=3))
It looks like abline
function is called from inside the heatmap.2 function and doesn't see the external variables. 它看起来像
abline
功能从heatmap.2函数内部调用,不看外部变量。
Please advice what would be the best approach. 请告知什么是最好的方法。
Of course, I don't want to modify any of the functions except my own. 当然,除我自己的功能外,我不想修改任何功能。
This seems to add the two thick lines: 这似乎增加了两条粗线:
heatmap.2(xx,
add.expr=eval( abline(v=linePosition, lwd=3)))
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