Find gaps in a data series

Looks for NAs (gaps) in a data series and counts the number of NAs. Useful for smooth_points_df, which can fill gaps up to a certain length. 0 means no gap, 1 means a single NA, and so forth.

Usage

find_gaps_df(.data, cols, .frame = frame, .out = c("gaplen"))

Arguments

.data

Data frame containing the midlines.

cols

Columns containing the components to be smoothed. Often these will be the x and y coordinates of the midline.

.frame

Column identifying frames (default is frame)

.out

Name of the column to contain the length of the gap.

Value

The data frame with a new column.

Examples

# create a data frame with two NA gaps of different lengths
df <- data.frame(frame = 1:10,
                 x = c(1, 2, NA, NA, 5, 6, 7, NA, 9, 10))
find_gaps_df(df, x)
#>    frame  x gaplen
#> 1      1  1      0
#> 2      2  2      0
#> 3      3 NA      2
#> 4      4 NA      2
#> 5      5  5      0
#> 6      6  6      0
#> 7      7  7      0
#> 8      8 NA      1
#> 9      9  9      0
#> 10    10 10      0