bf.test function

[mingtr]

I don't understand the function and how to write this function, when I use it, I get the message: Error in eval(predvars, data, env) : object 'X' not found. how to fix it

[nirgrahamuk]

Hi, welcome!

We don't really have enough info to help you out. Could you ask this with a minimal REPRoducible EXample (reprex)? A reprex makes it much easier for others to understand your issue and figure out how to help.

If you've never heard of a reprex before, you might want to start by reading this FAQ:

FAQ: How to do a minimal reproducible example ( reprex ) for beginners

A minimal reproducible example consists of the following items: A minimal dataset, necessary to reproduce the issue The minimal runnable code necessary to reproduce the issue, which can be run on the given dataset, and including the necessary information on the used packages. Let's quickly go over each one of these with examples: Minimal Dataset (Sample Data) You need to provide a data frame that is small enough to be (reasonably) pasted on a post, but big enough to reproduce your issue. Let's say, as an example, that you are working with the iris data frame head(iris) #> Sepal.Length Sepal.Width Petal.Length Petal.Width Species #> 1 5.1 3.5 1.4 0.…

[alberton]

bf.test performs Brown-Forsythe test.
bf.test(formula, data, alpha = 0.05, na.rm = TRUE, verbose = TRUE)

[mingtr]

i want to test stock price and occurrence date, i have excel data as , , however when i use command bf.test(Price ~ Date , data = da), it doesn't work and there is a message that the object cannot be found, please help me to correct it

[nirgrahamuk]

What steps did you take to load your excel into R ?