Add timestamps to frames

This function adds timestamps to frames created with frames_spatial.

add_timestamps(frames, m = NULL, x = NULL, y = NULL, ..., verbose = TRUE)

Arguments

frames

an object of class moveVis created with frames_spatial.

m

deprecated, times are natively stored in moveVis frames_spatial objects.

x

numeric, optional, position of timestamps on the x scale. By default, timestamps will be displayed in the top center.

y

numeric, optional, position of timestamps on the y scale.

...

optional, arguments passed to add_text, such as colour, size, type.

verbose

logical, if TRUE, messages and progress information are displayed on the console (default).

Value

A frames object of class moveVis.

See also

frames_spatial frames_graph animate_frames

Author

Jakob Schwalb-Willmann

Examples

library(moveVis)
library(move)

data("move_data", "basemap_data")
m <- align_move(move_data, res = 4, unit = "mins")
#> Temporal resolution of 4 [mins] is used to align trajectories.

# create spatial frames using a custom NDVI base layer
r_list <- basemap_data[[1]]
r_times <- basemap_data[[2]]

if (FALSE) {
frames <- frames_spatial(m, r_list = r_list, r_times = r_times, r_type = "gradient",
                         fade_raster = TRUE)

# add timestamps as text
frames.a <- add_timestamps(frames, type = "text")
frames.a[[100]]

# or use the ggplot2 "label" type:
frames.b <- add_timestamps(frames, type = "label")
frames.b[[100]]
}