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#ifndef __CGLA_STATISTICS_H__
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#ifndef __CGLA_STATISTICS_H__
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#define __CGLA_STATISTICS_H__
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#define __CGLA_STATISTICS_H__
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#include <vector>
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#include <vector>
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namespace CGLA
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namespace CGLA
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{
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{
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  template<class VT>
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  template<class VT>
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    VT mean(const std::vector<VT>& vec)
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    VT mean(const std::vector<VT>& vec)
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    {
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    {
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      VT v(0);
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      VT v(0);
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      for(int i=0;i<vec.size();++i)
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      for(int i=0;i<vec.size();++i)
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	v += vec[i];
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	v += vec[i];
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      v /= vec.size();
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      v /= vec.size();
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      return v;
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      return v;
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    }
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    }
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  /** Function that computes the covariance of a set of points.
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  /** Function that computes the covariance of a set of points.
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      This function returns the mean, and, upon completion, the
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      This function returns the mean, and, upon completion, the
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      final argument contains the covariance matrix.
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      final argument contains the covariance matrix.
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      This template is instantiated for Vec3f, Vec2f, and Vec4f. */
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      This template is instantiated for Vec3f, Vec2f, and Vec4f. */
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  template<class VT, class MT>
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  template<class VT, class MT>
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    VT covariance(const std::vector<VT>& vec, MT& C_out);
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    VT covariance(const std::vector<VT>& vec, MT& C_out);
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}
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}
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#endif
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#endif
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