Subgrid by selection of levels in one dimension.
An object with class
An expression concerning one of the dimension of
The wanted type of result. When
A vector of integer indices, a
Grid object or a list
embedding these two elements, depending on the value of
Grid returned (if any) uses consecutive
numbers for the nodes between 1 and the number of new nodes. So it
no longer keeps trace of the nodes position in
the surviving nodes are kept in the order that they had in
When a response vector or matrix say
Y is related to the
X, the index vector returned by
subgrid can be used to select the corresponding responses.
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