Returns a list of x-values and y-values of points defined by the fractions 'w' along the partial linear path defined by the points (x,y). Cumulative lengths of the path are also returned.

1 2 3 |

`x` |
is the input x-variable. |

`y` |
is the input y-variable. |

`w` |
are the positions along the path (x,y). If 'w' is a single integer, it is set to seq(0,1,length.out=w). If 'speed' is given 'w' is interpreted as time values. |

`dw` |
are the piecewise lengths along the path (x,y), used only if w!=NULL. If 'dw' has length>1 it overrides 'w' by w=cumsum(dw). |

`speed` |
are the speed values along the path (x,y), or along the x-axis if alongx==TRUE. If given it overrides 'w'. |

`start` |
is a vector of two values representing the start point if 'x' and 'y' represent angles and lengths. If 'start' is given, 'x' and 'y' are interpreted as angles and lengths. |

`alongx` |
is TRUE if tracking is to be done along the x-axis, and not along the path (x,y). |

`normalized` |
is TRUE if the positions given by 'w' (and 'speed') are or should be normalized to [0,1], where 1 refers to the end of the path. |

`list.out` |
is TRUE if the output should be a data frame with the names "x", "y" and "l". Else a matrix with the same names is returned. |

`plot` |
is TRUE if a simple plot is to be drawn. |

`...` |
are parameters to be passed on to plot() if plot==TRUE. |

arnejohannesholmin/echoIBM documentation built on March 19, 2018, 9:16 a.m.

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