Removed invalid strides from egait Segmentation validation

CHANGELOG.md

@@ -4,6 +4,12 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/) (+ the Migration Guide),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [Unreleased]
+
+### Fixed
+- The egait segmentation validation dataset contained strides that had negative duration.
+  We now remove them during loading.
+
 ## [0.12.0] - 2023-04-27
 
 ### Added

gaitmap_datasets/egait_segmentation_validation_2014/helper.py

@@ -129,7 +129,7 @@ def get_original_segmented_stride_list(
         if file_path is None:
             stride_borders[sensor] = None
             continue
-        stride_borders[sensor] = (
+        tmp = (
             pd.read_csv(
                 file_path,
                 skiprows=8,
@@ -138,6 +138,10 @@ def get_original_segmented_stride_list(
             .rename(columns={"Start": "start", "End": "end"})
             .rename_axis(index="s_id")
         )
+        # for some reason some strides have negative durations, which is obviously wrong.
+        # We will just drop them.
+        tmp = tmp[tmp["end"] > tmp["start"]]
+        stride_borders[sensor] = tmp
     return stride_borders