Calculates step metrics including distance, dt, dx, and dy.

Source: R/step_calculation.R

Calculates step metrics including distance, dt, dx, and dy.

step_metrics(x)

Arguments

x

an sftrack/sftraj object. sftrack objects will be converted to sftraj internally for calculation.

Examples


step_metrics(racc_traj)[1:10, ]

#>            dx          dy       dist    dt  abs_angle rel_angle       speed
#> 1          NA          NA         NA  3600         NA        NA          NA
#> 2    0.000000   0.0000000         NA  3600         NA        NA          NA
#> 3          NA          NA         NA  3600         NA        NA          NA
#> 4          NA          NA         NA  3600         NA        NA          NA
#> 5  498.309348 109.0329742 510.096380  3600  2.9272914        NA 0.141693439
#> 6   22.473674 105.0175956 107.395332  3600  1.3588662 -1.568425 0.029832037
#> 7    5.549011   0.9266259   5.625847  3574  0.1645841 -1.194282 0.001574104
#> 8    0.000000   0.0000000         NA  3626         NA        NA          NA
#> 9          NA          NA         NA 32400         NA        NA          NA
#> 10   6.103901  14.5171382  15.748173  3575 -1.1708341        NA 0.004405083
#>                       sftrack_id
#> 1  TTP-058_1_2019-01-18 19:02:30
#> 2  TTP-058_1_2019-01-18 20:02:30
#> 3  TTP-058_1_2019-01-18 21:02:30
#> 4  TTP-058_1_2019-01-18 22:02:30
#> 5  TTP-058_1_2019-01-18 23:02:30
#> 6  TTP-058_1_2019-01-19 00:02:30
#> 7  TTP-058_1_2019-01-19 01:02:30
#> 8  TTP-058_1_2019-01-19 02:02:04
#> 9  TTP-058_1_2019-01-19 03:02:30
#> 10 TTP-058_1_2019-01-19 12:02:30