From aff07eb4f3daa1bd53539e6d38dc72e0232643fa Mon Sep 17 00:00:00 2001
From: William Fondrie <fondriew@gmail.com>
Date: Mon, 25 Jan 2021 13:11:20 -0800
Subject: [PATCH] Fixes problem with unsigned integers

---
 mokapot/qvalues.py | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/mokapot/qvalues.py b/mokapot/qvalues.py
index b0b00177..ad41a72c 100644
--- a/mokapot/qvalues.py
+++ b/mokapot/qvalues.py
@@ -61,6 +61,11 @@ def tdc(scores, target, desc=True):
     if scores.shape[0] != target.shape[0]:
         raise ValueError("'scores' and 'target' must be the same length")
 
+    # Unsigned integers can cause weird things to happen.
+    # Convert all scores to floats to for safety.
+    if np.issubdtype(scores.dtype, np.integer):
+        scores = scores.astype(np.float_)
+
     # Sort and estimate FDR
     if desc:
         srt_idx = np.argsort(-scores)