dataframe

When you extract a single row from a data frame you get a one-row data frame. Convert it to a numeric vector: As @Roland suggests, unlist(df[1,]) will convert the one-row data frame to a numeric vector without dropping the names. Therefore unname(unlist(df[1,])) is another, slightly more explicit way to get to the same result. As … Read more

I figured it out already: does what I need — apparently, the table needs to somehow be converted to a matrix in order to be appropriately translated into a data frame. I found more details on this as.data.frame.matrix() function for contingency tables at the Computational Ecology blog.

We can use across with summarise

You could use cut data

I want to split a data frame into several smaller ones. This looks like a very trivial question, however I cannot find a solution from web search.

Differents lengths in original x, x1 and z lists is the first problem, how can you say which z values is related to each x and x1 values? Another problem is here: You clean x and x1 before calculating x_to_remove and x1_to_remove EDIT: To achieve your desired output try this code (/ode lines added signed … Read more

Based on @Dave2e comment. It is better to use data=NewSetSlide.ex argument inside lm function call to avoid naming conflicts moreover you should avoid using attach function. Please see as below (NewSetSlide.ex data frame was taken from the question above): Output:

(For the columns that are factors, you can only assign values that are factor levels. If you wanted to assign a value that wasn’t currently a factor level, you would need to create the additional level first:

you appear to have a problem with the type of object you have. you can try converting it to a data frame using unlist, as.data.frame(), etc.