plot.GaussianProcess: Plot a Gaussian Process
In mattdneal/gaussianProcess: Gaussian Process Fitting and Prediction

Plots the posterior mean and first three standard deviations of a one-dimensional Gaussian process.

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## S3 method for class 'GaussianProcess'
plot(gp.obj, xlim = NULL, num.points = 1000,
  col.index = 1, ...)

`gp.obj`	A gaussianProcess object
`xlim`	The limits of the x-axis in the plot. Defaults to the limits of the training data plus one-quarter of the range at either end.
`num.points`	The number of data points to calculate for the plot
`col.index`	if the predictor data is multi-dimensional, specify which dimension to plot. Other dimensions will be set to their mean.
`...`	Additional parameters to pass to `plot`