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Add `polyshape`

boundary

`polyout = addboundary(`

adds `polyin`

,`{x1,x2,...,xM}`

,`{y1,y2,...,yM}`

)*M* boundaries, where the vectors of
*x*-coordinates for each boundary are listed together in a cell
array. The corresponding vectors of *y*-coordinates also are listed
together in a cell array. Each *x _{i}* must
have the same length as the corresponding

`polyout = addboundary(___,`

specifies additional parameters for adding boundaries to a
`Name,Value`

)`polyshape`

for any of the previous syntaxes.