%+na% | R Documentation |

This function "defines a dyadic operator that will behave differently than
the "+" operator with regards to missing values". (Quote by 42- in Source
1 below). In this case, add `x`

and `y`

so that `NA`

is ignored
when `x`

is a number and `x = NA`

when `x = 0`

.

```
x %+na% y
```

`x` |
numeric vector that does not contain any |

`y` |
numeric vector which contains at least one |

numeric vector resulting from the `sum`

of `x`

and `y`

Using ':=' in data.table to sum the values of two columns in R, ignoring NAs - Stack Overflow answered by 42- on Oct 28 2012. See https://stackoverflow.com/questions/13106645/using-in-data-table-to-sum-the-values-of-two-columns-in-r-ignoring-nas.

R - merge unequal regular (15 min intervals) and irregular time series within 10 minutes - Stack Overflow asked by iembry on Jan 12 2015 and edited by iembry on Feb 2 2015. See https://stackoverflow.com/questions/27911643/r-merge-unequal-regular-15-min-intervals-and-irregular-time-series-within-10.

r - How to not run an example using roxygen2? - Stack Overflow answered and edited by samkart on Jul 9 2017. (Also see the additional comments in response to the answer.) See https://stackoverflow.com/questions/12038160/how-to-not-run-an-example-using-roxygen2.

devtools - Issues in R package after CRAN asked to replace dontrun by dontrun - Stack Overflow answered by Hong Ooi on Sep 1 2020. (Also see the additional comments in response to the answer.) See https://stackoverflow.com/questions/63693563/issues-in-r-package-after-cran-asked-to-replace-dontrun-by-dontrun.

```
library("ie2misc")
a <- 1:10
b <- c(98:106, NA)
a %+na% b
## Not run:
# See Source 3 and Source 4
# Note that if the vector with the NA value(s) is first, then an error
# message will be displayed as now there are checks for both x and y.
a <- 1:10
b <- c(98:106, NA)
try(b %+na% a)
## End(Not run)
a1 <- 1:12
b1 <- c(98:106, rep(NA, 3))
a1 %+na% b1
# using a matrix of the numeric vectors a and b
mat1 <- matrix(data = c(a, b), nrow = length(b), ncol = 2, byrow = FALSE,
dimnames = list(c(rep("", length(b))), c("a", "b")))
mat1[, 1] %+na% mat1[, 2]
# using a data.frame of the numeric vectors a and b
df1 <- data.frame(a, b)
df1[, 1] %+na% df1[, 2]
library("data.table")
# using a data.table of the numeric vectors a and b
a <- 1:10
b <- c(98:106, NA)
df2 <- data.table(a, b)
df2[, 1, with = FALSE][[1]] %+na% df2[, 2, with = FALSE][[1]]
```

Embedding an R snippet on your website

Add the following code to your website.

For more information on customizing the embed code, read Embedding Snippets.