Rcpp Version 1.0.9
cummin.h
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1 // -*- mode: C++; c-indent-level: 4; c-basic-offset: 4; tab-width: 8 -*-
2 //
3 // cumsum.h: Rcpp R/C++ interface class library -- cumsum
4 //
5 // Copyright (C) 2010 - 2011 Dirk Eddelbuettel and Romain Francois
6 //
7 // This file is part of Rcpp.
8 //
9 // Rcpp is free software: you can redistribute it and/or modify it
10 // under the terms of the GNU General Public License as published by
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13 //
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15 // WITHOUT ANY WARRANTY; without even the implied warranty of
16 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 // GNU General Public License for more details.
18 //
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21 
22 #ifndef Rcpp__sugar__cummin_h
23 #define Rcpp__sugar__cummin_h
24 
25 namespace Rcpp{
26 namespace sugar{
27 
28 template <int RTYPE, bool NA, typename T>
29 class Cummin : public Lazy< Rcpp::Vector<RTYPE>, Cummin<RTYPE, NA, T> > {
30 public:
34 
35  Cummin(const VEC_TYPE& object_) : object(object_) {}
36 
37  VECTOR get() const {
38  R_xlen_t n = object.size();
39  VECTOR result(n, Rcpp::traits::get_na<RTYPE>());
40  STORAGE current = object[0];
41 
42  if (Rcpp::traits::is_na<RTYPE>(current)) return result;
43  result[0] = current;
44  for (R_xlen_t i = 1; i < n; i++) {
45  current = object[i];
46  if (Rcpp::traits::is_na<RTYPE>(current)) return result;
47  result[i] = result[i-1] < current ? result[i-1] : current;
48  }
49  return result ;
50  }
51 private:
52  const VEC_TYPE& object;
53 };
54 
55 } // sugar
56 
57 
58 template <bool NA, typename T>
61 }
62 
63 template <bool NA, typename T>
66 }
67 
68 
69 } // Rcpp
70 #endif // Rcpp__sugar__cummin_h
71 
R_xlen_t size() const
Definition: Vector.h:276
Rcpp::traits::storage_type< RTYPE >::type STORAGE
Definition: cummin.h:32
Rcpp::VectorBase< RTYPE, NA, T > VEC_TYPE
Definition: cummin.h:31
Rcpp::Vector< RTYPE > VECTOR
Definition: cummin.h:33
Cummin(const VEC_TYPE &object_)
Definition: cummin.h:35
const VEC_TYPE & object
Definition: cummin.h:52
VECTOR get() const
Definition: cummin.h:37
Rcpp API.
Definition: algo.h:28
sugar::Cummin< INTSXP, NA, T > cummin(const VectorBase< INTSXP, NA, T > &t)
Definition: cummin.h:59