README
¶
#matlib matlib is a small package for the creation and testing of matrices for openLCA. It uses the high performance math library OpenBLAS.
Usage
Checkout this repository:
git clone https://github.com/GreenDelta/matlib.git
Build the native library for native library for your system as described
in native/Build_<your_os>.md.
File format
This package provides methods for loading (goblapack.Load) and saving
(goblapack.Save) matrices from files in a simple binary format:
header 8 bytes
4 bytes: uint32, number of rows, little endian order
4 bytes: uint32, number of columns, little endian order
content, rows * columns * 8 bytes:
matrix data, float64, little endian and column major order
Here is a small Python script for writing a Numpy matrix in this format:
m = numpy.load('path/to/file.npy')
rows, cols = m.shape
with open('path/to/file.bin', 'wb') as f:
f.write(struct.pack("<i", rows))
f.write(struct.pack("<i", cols))
for col in range(0, cols):
for row in range(0, rows):
val = m[row, col]
f.write(struct.pack("<d", val))
Documentation
¶
Index ¶
- func LoadColumn(file string, column int) ([]float64, error)
- func Save(m *Matrix, file string) error
- type Matrix
- func (m *Matrix) Copy() *Matrix
- func (m *Matrix) Get(row, col int) float64
- func (m *Matrix) GetPtr(row, col int) *float64
- func (m *Matrix) Invert() (*Matrix, error)
- func (m *Matrix) InvertInPlace() error
- func (m *Matrix) Multiply(b *Matrix) (*Matrix, error)
- func (m *Matrix) Set(row, col int, value float64)
- func (m *Matrix) Subtract(b *Matrix) (*Matrix, error)
Constants ¶
This section is empty.
Variables ¶
This section is empty.
Functions ¶
func LoadColumn ¶
LoadColumn reads the given (zero-based) column from the given matrix file.
Types ¶
type Matrix ¶
Matrix is a dense matrix structure that holds the data in column-major order in a linear array. Because of this lay
func MakeMatrix ¶
MakeMatrix is a convenience function for creating a matrix from a 2 dimensional float slice. It is mainly used for testing purposes.
func (*Matrix) InvertInPlace ¶
InvertInPlace calculates the inverse of the matrix which is stored directly in the original matrix.
func (*Matrix) Multiply ¶
Multiply calculates the matrix-matrix-product C = A * B where A is the matrix on which the method is called, B the method parameter, and C the return value.
Source Files
Directories