linalg:sign

(linalg:sign array)

Returns a fresh array of the same shape with the sign of every element as -1.0 / 0.0 / 1.0 (numpy's np.sign) -- equivalent to (linalg:emap #'signum array), but as a named function it is accelerated under --simd. It follows signum's own edges on each backend, so a -0.0 element (which the interpreter and JVM keep as -0.0 and WASM maps to 0.0) is best avoided in cross-backend output.