mir-algorithm 0.8.0-alpha4

Mir Algorithm

Dlang core library for math, finance and a home for Dlang multidimensional array package - ndslice.

Links

• API Documentation
• Scheme of basic API (advanced)
• Lubeck - Linear Algebra Library for Mir Algorithm

Blogs

• Mir Blog
• Shigeki Karita - D言語で数値計算 mir-algorithm

Example (3 sec)

import mir.ndslice;

auto matrix = slice!double(3, 4);
matrix[] = 0;
matrix.diagonal[] = 1;

auto row = matrix[2];
row[3] = 6;
assert(matrix[2, 3] == 6); // D & C index order

Example (30 sec)

import mir.ndslice;
import std.stdio: writefln;

enum fmt = "%(%(%.2f %)\n%)\n";

// Magic sqaure. 
// `a` is lazy, each element is computed on-demand.
auto a = magic(5).as!float;
writefln(fmt, a);

// 5x5 grid on sqaure [1, 2] x [0, 1] with values x * x + y. 
// `b` is lazy, each element is computed on-demand.
auto b = linspace!float([5, 5], [1f, 2f], [0f, 1f]).map!"a * a + b";
writefln(fmt, b);

// allocate a 5 x 5 contiguous matrix
auto c = slice!float(5, 5);

c[] = transposed(a + b / 2); // no memory allocations here
    // 1. b / 2 - lazy element-wise operation with scalars
    // 2. a + (...) - lazy element-wise operation with other slices
        // Both slices must be `contiguous` or one-dimensional.
    // 3. transposed(...) - trasposes matrix view. The result is `universal` (numpy-like) matrix.
    // 5. c[] = (...) -- performs element-wise assignment.
writefln(fmt, c);

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