From 328c564fdd1edf4272339d6763c16143ba6f21b1 Mon Sep 17 00:00:00 2001
From: Fabian Joswig <fabian.joswig@ed.ac.uk>
Date: Fri, 27 May 2022 14:00:46 +0100
Subject: [PATCH] feat: further improvement of inverse of cholesky decomposed
 correlation matrix.

---
 pyerrors/fits.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pyerrors/fits.py b/pyerrors/fits.py
index 45c8081c..3af1f96e 100644
--- a/pyerrors/fits.py
+++ b/pyerrors/fits.py
@@ -477,7 +477,7 @@ def _standard_fit(x, y, func, silent=False, **kwargs):
         if condn > 1 / np.sqrt(np.finfo(float).eps):
             warnings.warn("Correlation matrix may be ill-conditioned, condition number: {%1.2e}" % (condn), RuntimeWarning)
         chol = np.linalg.cholesky(corr)
-        chol_inv = scipy.linalg.solve(chol, covdiag)
+        chol_inv = scipy.linalg.solve_triangular(chol, covdiag, lower=True)
 
         def chisqfunc_corr(p):
             model = func(p, x)