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armadillo-code/tests2/fn_cumsum.cpp
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2021-09-21 14:31:24 +10:00

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// SPDX-License-Identifier: Apache-2.0
//
// Copyright 2015 Conrad Sanderson (http://conradsanderson.id.au)
// Copyright 2015 National ICT Australia (NICTA)
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// ------------------------------------------------------------------------
#include <armadillo>
#include "catch.hpp"
using namespace arma;
TEST_CASE("fn_cumsum_1")
{
colvec a = linspace<colvec>(1,5,6);
rowvec b = linspace<rowvec>(1,5,6);
colvec c = { 1.0000, 2.8000, 5.4000, 8.8000, 13.0000, 18.0000 };
REQUIRE( accu(abs(cumsum(a) - c )) == Approx(0.0).margin(0.001) );
REQUIRE( accu(abs(cumsum(b) - c.t())) == Approx(0.0).margin(0.001) );
REQUIRE_THROWS( b = cumsum(a) );
}
TEST_CASE("fn_cumsum_2")
{
mat A =
{
{ -0.78838, 0.69298, 0.41084, 0.90142 },
{ 0.49345, -0.12020, 0.78987, 0.53124 },
{ 0.73573, 0.52104, -0.22263, 0.40163 }
};
mat B =
{
{ -0.78838, 0.69298, 0.41084, 0.90142 },
{ -0.29493, 0.57278, 1.20071, 1.43266 },
{ 0.44080, 1.09382, 0.97808, 1.83429 }
};
mat C =
{
{-0.78838, -0.09540, 0.31544, 1.21686 },
{ 0.49345, 0.37325, 1.16312, 1.69436 },
{ 0.73573, 1.25677, 1.03414, 1.43577 }
};
REQUIRE( accu(abs(cumsum(A) - B)) == Approx(0.0).margin(0.001) );
REQUIRE( accu(abs(cumsum(A,0) - B)) == Approx(0.0).margin(0.001) );
REQUIRE( accu(abs(cumsum(A,1) - C)) == Approx(0.0).margin(0.001) );
}