Fixed the match_artifact function

Previously forgot the ulines are now an OrderedDict; now the loop to get uline frequencies is working correctly.

Author: laserkelvin

pyspectools/spectra/analysis.py

@@ -683,7 +683,7 @@ def match_artifacts(on_exp, off_exp, thres=0.05, freq_col="Frequency"):
         if hasattr(obj, "peaks") is False:
             raise Exception("{} has no peaks!".format(obj.__name__))
 
-    ufreqs = np.array([uline.frequency for uline in on_exp.ulines])
+    ufreqs = np.array([uline.frequency for index, uline in on_exp.ulines.items()])
     candidates = dict()
     for _, row in off_exp.peaks.iterrows():
         min_freq = row[freq_col] - thres