msd_class: Methods for the object returned by 'msd'.
In metRology: Support for Metrological Applications

Description Usage Arguments Details Value Author(s) See Also Examples

Print and plotting methods for the MSD object class returned by msd.

       ## S3 method for class 'MSD'
print(x, ...)

       ## S3 method for class 'MSD'
plot(x, type="h", ylab="MSD", ...)

       ## S3 method for class 'MSD'
barplot(height, ylab="MSD", names.arg=names(height), 
	crit.vals=TRUE, lty.crit=c(2,1), col.crit=2, lwd.crit=c(1,2), 
	probs=c(0.95, 0.99), n=length(height), ... )

`x, height`	Object of class `"MSD"`.
`type`	The plot type. See `plot.default`.
`ylab`	Label for vertical axis, passed to `barplot`
`names.arg`	Labels for individual bars in bar plot, passed to `barplot`. If `names(height)` is `NULL`, bars are numbered.
`crit.vals`	If `TRUE`, horizontal lines at critical values are added to the plot. These are calculated by `link{qmsd}` based on supplied values of `probs`, `n` and `multiple`.
`lty.crit, col.crit, lwd.crit`	Vectors of line style parameters for plotted critical values, passed to `segments`. Recycled to the length of `critical.values` in the supplied `bootMSD` object.
`probs`	vector of probabilities at which critical values are drawn.
`n`	integer number of observations for critical value calculation; passed to `qmsd`.
`...`	Parameters passed to other methods.

See msd for the object description.

For the barplot method, critical values are ‘single-observation’ quantiles. For use as an outlier test, use probabilities adjusted for multiple comparison; for example, for the barplot method, consider raising the default probs to the power 1/n.

The print method returns the object, invisibly.

The plot method returns NULL, invisibly.

The barplot methods return the values at the midpoint of each bar.

S. L. R. Ellison s.ellison@lgc.co.uk

msd, qmsd.

  data(Pb)
  msd.Pb<-msd(Pb$value, Pb$u)  # Uses individual standard uncertainties
  names(msd.Pb) <- as.character(Pb$lab)
  
  plot(msd.Pb)

  barplot(msd.Pb)