search for: r2007

I have a beginner question. After I finally get the data to a data.frame that I can work with I have the following a data frame that is fairly long: > length(r2007) [1] 17409 If I look at the first element: > r2007[1] $`100009` DayOfYear Quantity 1 66 1 2 128 1 3 137 1 4 193 1 Now how do I get the length of this list (actually it is another data.frame)? I have tried: > length(r2007[1]) [1] 1 N...

...uot;,"SubCategory","Sku"), measure.var=c("Quantity")) m2007 <- melt(t2007, id.var=c("DayOfYear","Category","SubCategory","Sku"), measure.var=c("Quantity")) r2008 <- cast(m2008, DayOfYear ~ variable | Sku, sum) r2007 <- cast(m2007, DayOfYear ~ variable | Sku, sum) Now I would like to union the two lists. So I start out with an empty master list that will contain (when I am done) the merge (union) of r2008 and r2007. By "union" I mean that if the Sku exists in r2007 and r2008 I would like to create...

I have a list that is generated from the resape package function 'cast'. It consists of three columns, Sku, DayOfYear, variable it is generated like: r2007 <- cast(m2008, DayOfYear ~ variable | Sku, sum) Now DayOfYear can range from 1:365 but there are not necessarily that many rows in the list. What I want to do is make every row in the list of lenght 365 and have the values correspond to the sum of the DayOfYear in the list if present and 0 if n...