3 messages · William Dunlap, anna
Hello everyone, I have a time serie of n values, some are na's. I want to get a vector of size n whose elements represent on the time t < n the number of missing values between o and t. I know I can do it with a loop but I wanted to know if there was a function or a special syntax to do this. Thanks a lot!
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-----Original Message----- From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org] On Behalf Of anna Sent: Friday, January 22, 2010 8:56 AM To: r-help at r-project.org Subject: [R] Counting Na values on a time serie only on the past datas Hello everyone, I have a time serie of n values, some are na's. I want to get a vector of size n whose elements represent on the time t < n the number of missing values between o and t. I know I can do it with a loop but I wanted to know if there was a function or a special syntax to do this. Thanks a lot!
If x is your vector of numbers then cumsum(is.na(x)) should give what you want. You didn't show sample data so here is my example > x <- c(101,102,NA,104,NA) > cumsum(is.na(x)) [1] 0 0 1 1 2 Bill Dunlap Spotfire, TIBCO Software wdunlap tibco.com
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n-the-past-datas-tp1101617p1101617.html
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William thanks a lot that is exactly what I wanted! :working:
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