filter() not working on categorical variable

[jhodzic]

I am using the filter() function to extract rows from a data frame. When I try to extract based on a numerical variable , it works fine.

filter(Data, Weight == 50)

However, when I try via a categorical failure, I receive an error message

filter(Data, Sex == M)

"Error in filter_impl(.data, quo) : Evaluation error: comparison of these types is not implemented"

I am doing this in rmarkdown, not sure if that makes a difference.

Thanks!

[martin.R]

Try
filter(Data, Sex == "M")

[rensa]

To expand on Martin's solution, categorical values (either character or levels of factors) need to be wrapped in quote marks in R

[jhodzic]

@jhodzic

ter(Data, Sex == M) "Error in filter_impl(.data, quo) : Evaluation error: comparison of these types is not implemented"

hah! of course. I'm telling you, this is what happens when you use R once in a blue moon. thanks.

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Thanks