Description Usage Arguments Details Value

`pointDistance2`

performs Pythagorean Theorem and `cbind`

s all
columns from `to`

to new dists column.
It is only defined for one point (`from`

) to many (`to`

) points.
`pointDistance3`

performs Pythagorean Theorem and is to be used internally
within `distanceFromEachPoint`

as an alternative to `.pointDistance`

,
where it does many points (`from`

) to many (`to`

) points, one
`from`

point at a time. The results are then `rbind`

ed internally.
It does not `cbind`

extra columns from `to`

.

1 2 3 4 5 6 | ```
pointDistance2(to, from)
pointDistance3(fromX, toX, fromY, toY, maxDistance)
.pointDistance(from, to, angles = NA, maxDistance = NA_real_,
otherFromCols = FALSE)
``` |

`to` |
Numeric matrix with 2 or 3 columns (or optionally more, all of which
will be returned),
x and y, representing x and y coordinates of "to" cells, and
optional "id" which will be matched with "id" from |

`from` |
Numeric matrix with 2 or 3 or more columns. They must include x and y,
representing x and y coordinates of "from" cell. If there is a column
named "id", it will be "id" from |

`fromX` |
Numeric vector of x coordinates for 'from' points |

`toX` |
Numeric vector of x coordinates for 'to' points |

`fromY` |
Numeric vector of y coordinates for 'from' points |

`toY` |
Numeric vector of y coordinates for 'to' points |

`maxDistance` |
Numeric scalar. The maximum distance cutoff for returned distances. |

`angles` |
Logical. If |

A slightly faster way to calculate distances.

`pointDistance2`

: a matrix with all the `to`

columns plus one extra
`dists`

column.
`pointDistance3`

: a matrix with `x`

and `y`

columns from
`to`

plus one extra `dists`

column.

A matrix with 3 columns, x0, y0 and dists.

SpaDES.tools documentation built on June 19, 2018, 1:04 a.m.

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