VEC plot function (to use in conjunction with Importance function).
vecplot(I, graph = "VEC", leg = NULL, xval = 1, sort = FALSE, data = NULL,
digits = c(1, 1), TC = 1, intbar = NULL, lty = 1, pch = 19, col = NULL,
datacol = NULL, main = "", main2 = "", Grid = 0,
xlab = "", ylab = "", zlab = "",
levels = NULL, levels2 = NULL, showlevels = FALSE,
screen = list(z = 40, x = -60), zoom = 1, cex = 1)the output list of the Importance function.
type of VEC graph:
VEC -- 1-D VEC curve;
VECB -- 1-D VEC curve with box plots (only valid for SA methods: "DSA", "MSA");
VEC3 -- 2-D VEC surface;
VECC -- 2-D VEC contour;
see mgraph
the attribute input index (e.g. 1), only used if graph="VEC" or (graph="VEC3" or "VECC"
and length(interactions)=1, see Importance). if a vector, then several VEC curves are plotted (in this case, x-axis is scaled).
if factor inputs are sorted:
increasing -- sorts the first attribute (if factor) according to the response values, increasing order;
decreasing -- similar to increasing but uses reverse order;
TRUE -- similar to increasing;
increasing2 -- sorts the second attribute (for graph="VEC3" or "VECC", if factor, according to the response values), increasing order;
decreasing2 -- similar to increasing2 but uses reverse order;
FALSE -- no sort is used;
see mgraph
see mgraph
see mgraph
see mgraph
see mgraph
point type for the graph="VEC" curve, can be a vector if there are several VEC curve plots
color (e.g. "black", "grayrange", "white")
color of the data histogram for graph="VEC"
see mgraph
key title for graph="VECC"
see mgraph
x-axis label
y-axis label
z-axis label
if x1 is factor you can choose the order of the levels to this argument
if x2 is factor you can choose the order of the levels to this argument
if you want to show the factor levels in x1 or x2 axis in graph="VEC3":
FALSE or TRUE -- do not (do) show the levels in x1, x2 and z axis for factor variables;
vector with 3 logical values -- if you want to show the levels in each of the x1, x2 or z axis for factor variables (e.g. c(FALSE,FALSE,TRUE) only shows for z-axis).
select the perspective angle of the VEC3 graph:
x -- assumes list(z=0,x=-90,y=0);
X -- assumes list(x=-75);
y -- assumes list(z=0,x=-90,y=-90);
Y -- assumes list(z=10,x=-90,y=-90);
z -- assumes list(z=0,x=0,y=0);
xy -- assumes list(z=10,x=-90,y=-45);
else you need to specify a list with z, x an y angles, see wireframe
zoom of the wireframe (graph="VEC3")
label font size
A VEC curve/surface/contour plot.
For examples and references check: Importance
To cite the Importance function or sensitivity analysis method, please use:
P. Cortez and M.J. Embrechts. Using Sensitivity Analysis and Visualization Techniques to Open Black Box Data Mining Models. In Information Sciences, Elsevier, 225:1-17, March 2013.