Documentation 
plotAdded(mdl)
plotAdded(mdl,coef)
h = plotAdded(mdl,...)
h = plotAdded(mdl,coef,Name,Value)
plotAdded(mdl) produces a generalized added variable plot for all terms in mdl except the constant term.
plotAdded(mdl,coef) produces an added variable plot for the coef terms in mdl, after adjusting for all other terms.
h = plotAdded(mdl,...) returns handles to the lines in the plot.
h = plotAdded(mdl,coef,Name,Value) plots with additional options specified by one or more Name,Value pair arguments.
For many plots, the Data Cursor tool in the figure window displays the x and y values for any data point, along with the observation name or number.
mdl 
Linear model, as constructed by fitlm or stepwiselm. 
coef 
Coefficients in mdl. Represent as:

Specify optional commaseparated pairs of Name,Value arguments. Name is the argument name and Value is the corresponding value. Name must appear inside single quotes (' '). You can specify several name and value pair arguments in any order as Name1,Value1,...,NameN,ValueN.
'Color' 
Color of the line or marker, a string or ColorSpec specification. For details, see linespec. 
'LineStyle' 
Type of line, a string or Chart Line Properties specification. For details, see linespec. 
'LineWidth' 
Width of the line or edges of filled area, in points, a positive scalar. One point is 1/72 inch. Default: 0.5 
'MarkerEdgeColor' 
Color of the marker or edge color for filled markers, a string or ColorSpec specification. For details, see linespec. 
'MarkerFaceColor' 
Color of the marker face for filled markers, a string or ColorSpec specification. For details, see linespec. 
'MarkerSize' 
Size of the marker in points, a strictly positive scalar. One point is 1/72 inch. 
An added variable plot illustrates the incremental effect on the response of specified terms by removing the effects of all other terms. The slope of the fitted line is the coefficient of the linear combination of the specified terms projected onto the bestfitting direction. The adjusted response includes the constant (intercept) terms, and averages out all other terms.