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52 lines
1.6 KiB
C++
52 lines
1.6 KiB
C++
// This file is part of libigl, a simple c++ geometry processing library.
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//
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// Copyright (C) 2013 Alec Jacobson <alecjacobson@gmail.com>
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//
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// This Source Code Form is subject to the terms of the Mozilla Public License
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// v. 2.0. If a copy of the MPL was not distributed with this file, You can
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// obtain one at http://mozilla.org/MPL/2.0/.
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#ifndef IGL_MAT_MIN_H
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#define IGL_MAT_MIN_H
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#include "igl_inline.h"
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#include <Eigen/Dense>
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namespace igl
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{
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// Ideally this becomes a super overloaded function supporting everything
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// that matlab's min supports
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// Min function for matrices to act like matlab's min function. Specifically
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// like [Y,I] = min(X,[],dim);
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//
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// Templates:
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// T should be a eigen matrix primitive type like int or double
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// Inputs:
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// X m by n matrix
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// dim dimension along which to take min
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// Outputs:
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// Y n-long sparse vector (if dim == 1)
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// or
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// Y m-long sparse vector (if dim == 2)
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// I vector the same size as Y containing the indices along dim of minimum
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// entries
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//
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// See also: mat_max
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template <typename DerivedX, typename DerivedY, typename DerivedI>
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IGL_INLINE void mat_min(
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const Eigen::DenseBase<DerivedX> & X,
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const int dim,
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Eigen::PlainObjectBase<DerivedY> & Y,
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Eigen::PlainObjectBase<DerivedI> & I);
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// Use Y = X.colwise().minCoeff() instead
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//// In-line wrapper
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//template <typename T>
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//IGL_INLINE Eigen::Matrix<T,Eigen::Dynamic,1> mat_min(
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// const Eigen::Matrix<T,Eigen::Dynamic,Eigen::Dynamic> & X,
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// const int dim);
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}
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#ifndef IGL_STATIC_LIBRARY
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# include "mat_min.cpp"
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#endif
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#endif
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