From d92f004ab76cdf961b9279e228d9eb7349a4d8db Mon Sep 17 00:00:00 2001 From: Gael Guennebaud Date: Fri, 5 Oct 2018 23:11:21 +0200 Subject: Simplify API by removing allCols/allRows and reusing rowwise/colwise to define iterators over rows/columns --- doc/snippets/MatrixBase_colwise_iterator_cxx11.cpp | 12 ++++++++++++ 1 file changed, 12 insertions(+) create mode 100644 doc/snippets/MatrixBase_colwise_iterator_cxx11.cpp (limited to 'doc/snippets') diff --git a/doc/snippets/MatrixBase_colwise_iterator_cxx11.cpp b/doc/snippets/MatrixBase_colwise_iterator_cxx11.cpp new file mode 100644 index 000000000..88a9cd357 --- /dev/null +++ b/doc/snippets/MatrixBase_colwise_iterator_cxx11.cpp @@ -0,0 +1,12 @@ +Matrix3i m = Matrix3i::Random(); +cout << "Here is the initial matrix m:" << endl << m << endl; +int i = -1; +for(auto c: m.colwise()) { + c *= i; + ++i; +} +cout << "Here is the matrix m after the for-range-loop:" << endl << m << endl; +auto cols = m.colwise(); +auto it = std::find_if(cols.cbegin(), cols.cend(), + [](Matrix3i::ConstColXpr x) { return x.squaredNorm() == 0; }); +cout << "The first empty column is: " << distance(cols.cbegin(),it) << endl; \ No newline at end of file -- cgit v1.2.3