All Questions
6 questions
0
votes
2
answers
968
views
Sampling points in R with both distance constraint and group
I have a spatial point data frame with categorical variable as a column named "type", I would like to draw a random sample from these points (let's say 100 points) with maximum and minimum ...
- 606
0
votes
0
answers
66
views
How to make analyzeGPS distanceGPS group by trip?
I have a dataset with id, lat, lon and time, where each trip has a unique id.
When I try to use mutate with the distanceGPS function in the AnalyzeGPS package and group by trip using this code:
gps%&...
- 11
6
votes
1
answer
3k
views
r - Can dplyr::group_by work with sf::st_intersects
Trying to combine dplyr::group_by and sf::st_intersects to see which of the objects within groups in a sf dataframe are intersecting with each other but in the end all objects are compared with all ...
- 510
5
votes
0
answers
2k
views
Clustering of events within a space-time window (R)
I am relatively new to clustering methods and am trying to determine the best method for clustering (or merely grouping) events that fall within a space-time window using preferably R. My goal is to ...
- 85
1
vote
0
answers
86
views
How to group different values of a variable so that they plot with same shape?
I have a table with two columns of number X and Y, and one column of strings called crystals.
crystals
A
A
B
C
B
D
B
C
Using ggplot2, how can I make a scatter plot of X versus Y with two ...
18
votes
1
answer
8k
views
Clustering geographical data based on point location and associated point values
Given data points with longitude, latitude, and a third property value of this point. How can I cluster points into groups (geographical sub-regions) based on the property value? I searched by google ...
- 281