contourPlot: Contour Plot
In qualityTools: Statistical Methods for Quality Science

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

Creates a contour diagramm for an object of class facDesign.

1 2	contourPlot(x, y, z, data = NULL, xlim, ylim, main, xlab, ylab, form = "fit", col = 1, steps, factors, fun)

`x`	name providing the Factor A for the plot.
`y`	name providing the Factor B for the plot.
`z`	name giving the Response variable.
`data`	needs to be an object of class `facDesign` and contains the names of x,y,z.
`xlim`	vector giving the range of the x-axis.
`ylim`	vector giving the range of the y-axis.
`main`	an overall title for the plot: see `title`.
`xlab`	a title for the x axis: `title`.
`ylab`	a title for the y axis: `title`.
`form`	a character string or a formula with the syntax “y~ x+y + x*y”. If `form` is a character it has to be one out of the following: “quadratic” “full” “interaction” “linear” “fit” “fit” takes the formula from the fit in the facDesign object fdo. Quadratic or higher orders should be given as I(Variable^2). By default `form` is set as “fit”.
`col`	a predefined (1, 2, 3 or 4) or self defined `colorRampPalette` or color to be used (i.e. “red”).
`steps`	number of grid points per factor. By default `steps` = 25.
`factors`	list of 4th 5th factor with value i.e. factors = list(D = 1.2, E = -1), if nothing is specified values will be the mean of the low and the high value of the factors.
`fun`	function to be applied to z “desirability”.

This function can be used to display the desirability of each response by specifying fun = “desirability” or the fun = “overall” (i.e. composed) desirability of all responses. The required desirabilities can be set using desires.

The function contourPlot() returns an invisible list with the following entries:

x - locations of grid lines for x at which the values in z are measured
y - locations of grid lines for y at which the values in z are measured
z - a matrix containing the values of z to be plotted

For an example in context which shows the usage of the function contourPlot() to an object of class facDesign, please read the vignette for the package qualityTools at http://www.r-qualitytools.org/html/Improve.html.

Thomas Roth thomas.roth@tu-berlin.de

wirePlot
filled.contour
persp
colorRampPalette
http://www.r-qualitytools.org/html/Improve.html

#create a response surface design and assign random data to response y
fdo = rsmDesign(k = 3, blocks = 2)
response(fdo) = data.frame(y = rnorm(nrow(fdo)))
par(mfrow = c(2,3))

#I - display linear fit
contourPlot(A,B,y, data = fdo, form = "linear")
#II - display full fit (i.e. effect, interactions and quadratic effects
contourPlot(A,B,y, data = fdo, form = "full")
#III - display a fit specified before
fits(fdo) = lm(y ~ B + I(A^2) , data = fdo)
contourPlot(A,B,y, data = fdo, form = "fit")
#IV - display a fit given directly
contourPlot(A,B,y, data = fdo, form = "y ~ A*B + I(A^2)")
#V - display a fit using a different colorRamp
contourPlot(A,B,y, data = fdo, form = "full", col = 2)
#VI - display a fit using a self defined colorRamp
myColour = colorRampPalette(c("green", "gray","blue"))
contourPlot(A,B,y, data = fdo, form = "full", col = myColour)

Loading required package: Rsolnp
Loading required package: MASS

Attaching package: 'qualityTools'

The following object is masked from 'package:stats':

    sigma

Warning messages:
1: In `[<-`(`*tmp*`, i, value = <S4 object of class "doeFactor">) :
  implicit list embedding of S4 objects is deprecated
2: In `[<-`(`*tmp*`, i, value = <S4 object of class "doeFactor">) :
  implicit list embedding of S4 objects is deprecated
3: In `[<-`(`*tmp*`, i, value = <S4 object of class "doeFactor">) :
  implicit list embedding of S4 objects is deprecated