you would basically change the statement as follows:
aggregate(x$Quantity, list(DayOfYear=x$DayOfYear, Category=x$Category), FUN=sum)
On Sat, Jul 26, 2008 at 2:30 AM, <[EMAIL PROTECTED]> wrote:
> Thank you this is exactly what I wanted.
>
> I was unaware of the 'aggregate' function.
>
> Now what if I want to know the sum of the sales per day AND per Category? So
> for the data below the DayOfYearSales for HOLIDAY and day 1 would be 2.
>
> Thank you.
>
> Kevin
>
> ---- jim holtman <[EMAIL PROTECTED]> wrote:
>> Is this what you want:
>>
>> > x
>> Year DayOfYear Sku Quantity CatId Category SubCategory
>> 1 2007 1 100091 1 10862 HOLIDAY Christmas
>> 2 2007 1 100138 1 11160 PET COSTUMES Famous (Licensed)
>> 3 2007 1 100194 1 10749 HATS, WIGS & MASKS Wigs - Women's
>> 4 2007 1 100432 1 10865 HOLIDAY Easter
>> 5 2007 1 100911 1 10120 MEN Superheroes Men
>> 600 2007 2 139002 1 10413 GIRLS Historical Girls
>> 601 2007 2 138959 1 10322 BOYS TV & Movies Boys
>> 602 2007 2 139005 1 10334 BOYS Toddlers Boys
>> 603 2007 2 139052 1 10517 PLUS Plus Men
>> 604 2007 2 138906 1 10322 BOYS TV & Movies Boys
>> 605 2007 2 138860 1 0 (Unknown) (Unknown)
>> > aggregate(x$Quantity, list(DayOfYear=x$DayOfYear), FUN=sum)
>> DayOfYear x
>> 1 1 5
>> 2 2 6
>> >
>>
>>
>> On Sat, Jul 26, 2008 at 12:06 AM, <[EMAIL PROTECTED]> wrote:
>> > I have some data that I read in via read.csv:
>> >
>> > sales2007 <- read.csv("Total2007.dat", header=TRUE)
>> >
>> > The data looks like:
>> >
>> >> sales2007[1:605,]
>> > Year DayOfYear Sku Quantity CatId Category SubCategory
>> > 1 2007 1 100091 1 10862 HOLIDAY Christmas
>> > 2 2007 1 100138 1 11160 PET COSTUMES Famous (Licensed)
>> > 3 2007 1 100194 1 10749 HATS, WIGS & MASKS Wigs - Women's
>> > 4 2007 1 100432 1 10865 HOLIDAY Easter
>> > 5 2007 1 100911 1 10120 MEN Superheroes Men
>> > . . . .
>> > 600 2007 2 139002 1 10413 GIRLS Historical Girls
>> > 601 2007 2 138959 1 10322 BOYS TV & Movies Boys
>> > 602 2007 2 139005 1 10334 BOYS Toddlers Boys
>> > 603 2007 2 139052 1 10517 PLUS Plus Men
>> > 604 2007 2 138906 1 10322 BOYS TV & Movies Boys
>> > 605 2007 2 138860 1 0 (Unknown) (Unknown)
>> >>
>> >
>> > The DayOfYear goes from 1:365. I would like to form a vector from this
>> > data where the length of the vector is 365 and the value at each index
>> > coeresponds to the sum of the Quantity column where DayOfYear equals the
>> > index. For example if I was to use just the sample above this new vactor
>> > call it 'DayOfYearSales' would be:
>> > DayOfYearSales[1] = 5
>> > DayOfYearSales[2] = 6
>> > Since in the snippet above only DayOfYear = 1:2 is shown. I want to
>> > continue the sum for the whole data frame. I am sure this is fairly easy.
>> > I just cannot find out how to do it. Once I figure this out it would be
>> > relatively straightforward to apply the same principle to columns of like
>> > Category, SKU, or SubCategory.
>> >
>> > Something like:
>> >
>> > table(Category)
>> >
>> > would give me the number of entires for each unique value but I want the
>> > Quantity column used in this tabulation kind of like a frequency.
>> >
>> > Thank you.
>> >
>> > Kevin
>> >
>> > ______________________________________________
>> > R-help@r-project.org mailing list
>> > https://stat.ethz.ch/mailman/listinfo/r-help
>> > PLEASE do read the posting guide
>> > http://www.R-project.org/posting-guide.html
>> > and provide commented, minimal, self-contained, reproducible code.
>> >
>>
>>
>>
>> --
>> Jim Holtman
>> Cincinnati, OH
>> +1 513 646 9390
>>
>> What is the problem you are trying to solve?
>
>
--
Jim Holtman
Cincinnati, OH
+1 513 646 9390
What is the problem you are trying to solve?
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