zjucad::matrix
What is it?
This is matrix library in C++ which provides an interface similar (or nearly identical) to Matlab/Octave. The technique is similar to Eigen.
Some most important features include:
- matrix and vector are unified.
- index can be integer, range, and another integer-valued vector/matrix.
If you are familiar with MATLAB, you may find that this lib can easily bring your experience in MATLAB to your C++ code.
Usage
- Installation: One can add it as a dependency with CPM:
CPMAddPackage(
NAME zjucad.matrix
GITHUB_REPOSITORY ZJUCADGeoSim/matrix
GIT_TAG v0.1.0
)Or, just include the headers.
- About the ":" in Matlab
In C++, use "colon()" for ":", and use "colon(beg, end)" for "beg:end".
- A=A*B will give wrong answer
This is a common behavior of many libraries using C++ Expression Templates.
The correct way is A=temp(A*B). It should be noticed that A=A+B is correct. One can refer "Eigen: Aliasing" to understand this.
History
Jin Huang learned some about Matlab and when he was a bachelor student. Inspired by the design of mwArray in Matlab, he began to write C++ matrix library in 2001. After several rounds of code refactoring, he found the current design in 2004, and intensively applied it to all his projects, which makes the library mature enough. Now, many of his research work are still based on it.