本文整理汇总了C++中vnl_vector::data_block方法的典型用法代码示例。如果您正苦于以下问题：C++ vnl_vector::data_block方法的具体用法？C++ vnl_vector::data_block怎么用？C++ vnl_vector::data_block使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类vnl_vector的用法示例。
在下文中一共展示了vnl_vector::data_block方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: computeContrastCovariance
// get the covariance of a contrast given a contrast vector
// if this matrix is X, this function computes c' pinv(X'X) c
double RtDesignMatrix::computeContrastCovariance(
vnl_vector<double> &contrastVector) {
if (contrastVector.size() != columns()) {
cerr << "ERROR: number of elements in contrast vector does not match the "
<< "number of columns in the design matrix" << endl;
return std::numeric_limits<double>::quiet_NaN();
}
// compute the contrast covariance based on the currently known regressors
// NOTE: this will not be the same as computing it at the end of the
// experiment when all regressors are known. it would be nice to compute
// final values using the known design.
vnl_matrix<double> convec(contrastVector.data_block(),
contrastVector.size(), 1);
vnl_svd<double> pinv(transpose() * (*this));
vnl_matrix<double> result = convec.transpose() * pinv.pinverse() * convec;
return result.get(0, 0);
}