func (array sparseDiagF64Matrix) All() bool {
	return false
}
Returns true if and only if all items are nonzero
package matrix
import (
	"fmt"
)
type sparseDiagF64Matrix struct {
	shape []int
	diag  []float64
}
func (array sparseDiagF64Matrix) Add(other ...NDArray) NDArray {
	return Add(&array, other...)
}