c_weight: One iteration to run Newton Raphson to get c-optimal weights
In Opt5PL: Optimal Designs for the 5-Parameter Logistic Model

This is a sub-part of running Newton Raphon method to search c-optimal weights for the given design points. This is function probvides the obtained c-optimal weights after one iteration of Newton Raphson method.

1	c_weight(W, T, X, d, p, order, UB, I)

`W`	A numeric vector. The first K-1 weights for a given design
`T`	A numeric vector. Model parameter values
`X`	A numeric vector. K dose levels for a given design
`d`	Numeric. Step adjustment
`p`	Numeric. Define EDp
`order`	Numeric. The number of model paraemters
`UB`	Numeric. The upper bound of the design points
`I`	A numeric matrix. Identity matrix.