r - dcast fun.aggregate parameters

Question

In the R package reshape2, does the dcast() function parameter fun.aggregate= have the ability to accept parameters itself?

For instance:

dcast(dataFrame, x ~ y, value.var = 'z', fun.aggregate = mean(na.rm = TRUE))

I'm asking because I use my own function for the fun.aggregate parameter, and I'd rather not hard code the parameters into a growing list of functions.

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Answer 1

像 R 中的许多函数一样，dcast它有一个...参数，通常用于将附加参数传递给函数。实际上，在 处?dcast，您会在“参数部分”中找到这一行：

... 进一步的参数被传递给聚合函数

因此，编写示例的正确方法是：

dcast(dataFrame, x ~ y, value.var = 'z', fun.aggregate = mean, na.rm = TRUE)