This function computes partial derivatives of the CCC matrix with respect to its correlation coefficients.

1 | ```
vdR(n)
``` |

`n` |
the number of dimension of the model |

a matrix of zeros and ones *( (N(N-1))/2 \times N^{2} )*

Nakatani, T. and T. Ter\"asvirta (2009),
“Testing for Volatility Interactions in the Constant Conditional Correlation GARCH Model”,
*Econometrics Journal*, **12**, 147-163.

Nakatani, T. and T. Ter\"asvirta (2008),
“Appendix to *Testing for Volatility Interactions in the Constant Conditional Correlation GARCH Model*”
Department of Economic Statistics, Stockholm School of Economics,
available at http://swopec.hhs.se/hastef/abs/hastef0649.htm.

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