So now if I call str on S you'll see,

well there's a little bit of output that flies by.

You see now this is a list, that contains five different data

frames where each data frame corresponds to the data for a given month.

So the months are, the data are only collected over

five different months so that's why there's only five elements.

So here you can see that the month, the month five, which is May has

31 observations on six variables and that's a

little bit of what the data looked like.

And you'll see for June,

here, there's 30 observations on six

variables again, same six variables, of course.

And that's what the data look like there.

And then for July, the data are here. And August and September.

So you can see the you can have a representation

of this split list that's kind of, that's not as compact

as it was before but it's about as compact as you

can make it and str will provide a very nice summary.

You can take a quick look at the data.

See if there's any problems. See if there's missing values and

get a sense of what to do next. So that's the str function.

I'll, I'll repeat again, I think it's the most useful function

in all of R and you can use it in all cases.

I encourage you to use it anytime you have

an R object and, you don't know what's there.