Description Usage Arguments Value See Also

View source: R/kernDiagGradX.R

computes the gradient of the (diagonal of the) kernel matrix with respect to the elements of the design matrix given in X.

1 2 | ```
kernDiagGradX(kern, x)
kernGradX(kern, x1, x2)
``` |

`kern` |
the kernel structure for which gradients are being computed. |

`x` |
the input data in the form of a design matrix. |

`x1` |
row locations against which gradients are being computed. |

`x2` |
column locations against which gradients are being computed. |

`gX` |
the gradients of the diagonal with respect to each element of X. The returned matrix has the same dimensions as X. |

`gX2` |
the returned gradients. The gradients are returned in a matrix which is numData x numInputs x numData. Where numData is the number of data points and numInputs is the number of input dimensions in X. |

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