From 06dcf931751d7ac7136b6a0ff1346faf7921a593 Mon Sep 17 00:00:00 2001
From: Feda Curic <feda.curic@gmail.com>
Date: Wed, 17 Jan 2024 13:51:49 +0100
Subject: [PATCH] Update docstring explaining direct inversion

---
 src/iterative_ensemble_smoother/sies.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/iterative_ensemble_smoother/sies.py b/src/iterative_ensemble_smoother/sies.py
index 2ba5a1e1..3f73e03e 100644
--- a/src/iterative_ensemble_smoother/sies.py
+++ b/src/iterative_ensemble_smoother/sies.py
@@ -69,7 +69,7 @@ def __init__(
 
                 * `direct`:
                     Solve Eqn (42) directly, which involves inverting a
-                    matrix of shape (num_parameters, num_parameters).
+                    matrix of shape (num_observations, num_observations).
                 * `subspace_exact` :
                     Solve Eqn (42) using Eqn (50), i.e., the Woodbury
                     lemma to invert a matrix of size (ensemble_size, ensemble_size).