CODEWITHSUNDEEP
rxts
siebenkaese
siebenkaese

Reputation: 57

R- yearqtr data xts, access single quarters

I have an xts objects which is yearqtr (1990 Q1 2012 Q3). I want to work with the data going up to 2011 Q3. I tried several things:

data["1990::2011:3"]
data["1990/2012-3"]

The 3 is treated like monthly, so if i use

data["1990::2012:9]
data["1990/2012-9]

I get the third quarter. However, this is inconvenient. I would like to have the third quarter, whenever i put a three in the brackats. How would I write this ?

Best regards and thanks in advance

Upvotes: 0

Views: 850

Answers (2)

CHP
CHP

Reputation: 17189

You can use subset 

subset(data, index(data) >= as.yearqtr('1995 Q1') & index(data) <= as.yearqtr('2011 Q1')  )

or just normal subset using [ ]

data[index(data) >= as.yearqtr('2000 Q1') &  index(data) <= as.yearqtr('2011 Q1') ]

Upvotes: 1

agstudy
agstudy

Reputation: 121568

Try this

  data["1990::2011:x"]

Where x = 7 or 8 or 9 : they give all the same result.

Here an example

x <- as.yearqtr(1990 + seq(0, 4*(2013-1990))/4)
zz <- xts(rnorm(length(x)),x, frequency = 4)
as.ts(zz["1990::2011:9"])

Upvotes: 0

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