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This class represents a parameter whose value is obtained by evaluating a function.
CallbackParam(callback, dim = NULL, ...)# S4 method for CallbackParam value(object)
# S4 method for CallbackParam value(object)
A callback function that generates the parameter value.
The dimensions of the parameter.
Additional attribute arguments. See Leaf for details.
A CallbackParam object.
callback
dim
x <- Variable(2) fun <- function() { value(x) } y <- CallbackParam(fun, dim(x), nonneg = TRUE) get_data(y)
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