Displaying 2 results from an estimated 2 matches for "hourofday".
2003 Dec 16
1
Memory issues in "aggregate" (PR#5829)
...s())
> cvar <- function(x) sd(x)/mean(x)
> library(sm)
Library `sm', version 2; Copyright (C) 1997, 2000 A.W.Bowman & A.Azzalini
type help(sm) for summary information
> callsperhour <- function(x) length(x)/12
> profiles <- subset(read.csv("profiles.csv"), hourofday >=
7 & hourofday <= 19 & dayofweek >= 1 & dayofweek <= 5)
> nrow(profiles)
[1] 100520
> attach(profiles)
> pseudo.hist <- aggregate(duration, list(Delta), length)
> colnames(pseudo.hist) <- c("Delta", "N")
> detach(profiles)...
2011 Jul 07
3
How to make matrix missing data 0
Dear All,
I am trying to analysis traffic data with one timestamp column and speed
column. This data set contains six years data; for each year, I want to make
a matrix in (day of the year) * (hour)
0 1 2 . . . 23
1
2
.
.
365
However random day's record is missing(e.g. there are 40 missing records in
2005 data set), when I tried to use tapply function, matrix came out is