Official example, before API change

https://docs.rs/mdarray/0.6.1/mdarray/#example

1 files changed, 22 insertions, 0 deletions

diff --git a/src/main.rs b/src/main.rs
new file mode 100644
index 0000000..898142c
--- /dev/null
+++ b/src/main.rs
@@ -0,0 +1,22 @@
+use mdarray::{expr, grid, DSpan, Expression};
+
+fn matmul(a: &DSpan<f64, 2>, b: &DSpan<f64, 2>, c: &mut DSpan<f64, 2>) {
+    for (mut cj, bj) in c.cols_mut().zip(b.cols()) {
+        for (ak, bkj) in a.cols().zip(bj) {
+            for (cij, aik) in cj.expr_mut().zip(ak) {
+                *cij = aik.mul_add(*bkj, *cij);
+            }
+        }
+    }
+}
+
+fn main() {
+    let a = expr![[1.0, 2.0, 3.0], [4.0, 5.0, 6.0]];
+    let b = expr![[0.0, 1.0], [1.0, 1.0]];
+
+    let mut c = grid![[0.0; 3]; 2];
+
+    matmul(&a, &b, &mut c);
+
+    assert_eq!(c, expr![[4.0, 5.0, 6.0], [5.0, 7.0, 9.0]]);
+}