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| author | Yi Kong <yikong@google.com> | 2022-02-25 16:32:14 +0800 |
|---|---|---|
| committer | Yi Kong <yikong@google.com> | 2022-02-25 15:08:55 +0000 |
| commit | 2aab794c004027d008d6b0b64165bf1961d5d2bb (patch) | |
| tree | 83bb8f19c67bcafdb2ca4a98414af1b17392ec36 /doc/special_examples/Tutorial_sparse_example.cpp | |
| parent | ca5aa72016f062fd0712bcb86370478de332bca3 (diff) | |
| download | eigen-2aab794c004027d008d6b0b64165bf1961d5d2bb.tar.gz | |
Upgrade eigen to 3.4.0
Steps:
* Removed common files between Android copy and the matching upstream copy
* Obtained latest upstream tarball (see README.version)
* Extracted over the directory
Bug: 148287349
Test: presubmit
Change-Id: Iee2744719075fdf000b315e973645923da766111
Diffstat (limited to 'doc/special_examples/Tutorial_sparse_example.cpp')
| -rw-r--r-- | doc/special_examples/Tutorial_sparse_example.cpp | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/doc/special_examples/Tutorial_sparse_example.cpp b/doc/special_examples/Tutorial_sparse_example.cpp index 830e196ea..8850db052 100644 --- a/doc/special_examples/Tutorial_sparse_example.cpp +++ b/doc/special_examples/Tutorial_sparse_example.cpp @@ -1,5 +1,6 @@ #include <Eigen/Sparse> #include <vector> +#include <iostream> typedef Eigen::SparseMatrix<double> SpMat; // declares a column-major sparse matrix type of double typedef Eigen::Triplet<double> T; @@ -9,10 +10,13 @@ void saveAsBitmap(const Eigen::VectorXd& x, int n, const char* filename); int main(int argc, char** argv) { - assert(argc==2); + if(argc!=2) { + std::cerr << "Error: expected one and only one argument.\n"; + return -1; + } int n = 300; // size of the image - int m = n*n; // number of unknows (=number of pixels) + int m = n*n; // number of unknowns (=number of pixels) // Assembly: std::vector<T> coefficients; // list of non-zeros coefficients |