border_from_grid_points: Extract border
In shazhe/mvst0: Multi-variate ST modelling on globe
Description
Usage
Arguments
Details
Value
Author(s)
Examples
Description
The border is extracted from shapes supplied in x-y format
Usage
1
border_from_grid_points(df, delta)
Arguments
df
a data frame with fields x and y.
delta
the grid spacing.
Details
The algorithm works by finding how many neighbours a grid point has using fields::fields.rdist.near. A grid point with less than 4 neighbours is assumed to be a border point. For this algorithm to work, it is important that the shape is ‘full’ and not contain any missing values.
Value
a subset of df containing the border points.
Author(s)
Andrew Zammit Mangion
Examples
1
2
3
grid <- expand.grid(x = c(1:10), y = c(1:10))
names(grid) = c("x","y")
border_points <- border_from_grid_points(df=grid,delta=1)
shazhe/mvst0 documentation built on May 29, 2019, 9:20 p.m.
R Package Documentation
Browse R Packages
We want your feedback!
Note that we can't provide technical support on individual packages. You should contact the package authors for that.
Description Usage Arguments Details Value Author(s) Examples
Description
The border is extracted from shapes supplied in x-y format
Usage
1 | border_from_grid_points(df, delta)
|
Arguments
df |
a data frame with fields |
delta |
the grid spacing. |
Details
The algorithm works by finding how many neighbours a grid point has using fields::fields.rdist.near. A grid point with less than 4 neighbours is assumed to be a border point. For this algorithm to work, it is important that the shape is ‘full’ and not contain any missing values.
Value
a subset of df containing the border points.
Author(s)
Andrew Zammit Mangion
Examples
1 2 3 | grid <- expand.grid(x = c(1:10), y = c(1:10))
names(grid) = c("x","y")
border_points <- border_from_grid_points(df=grid,delta=1)
|
R Package Documentation
Browse R Packages
We want your feedback!
Note that we can't provide technical support on individual packages. You should contact the package authors for that.
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.