我想通过改变块大小来分割R中的数据，但每个观察都是唯一的

I have managed to read in a data file, and subset out the 2 columns of info that I want to work with. I am now stuck because I need to split the data into chunks of varying sizes and apply a function (mean, sd) to them, save the chunks and plot the sd from each. Otherwise known generally as block averaging. Right now I have a data frame with 2 columns and 10005 rows. The head of it looks like this:I have managed to read in a data file, and subs