diff --git a/TuningFork/var_m.dat b/TuningFork/var_m.dat
index c28a3902f0d4e05e06d711a126de864bf3d2d21f..324aa1b25ab6570ef34c10f5b75fe67690a3e0e4 100644
--- a/TuningFork/var_m.dat
+++ b/TuningFork/var_m.dat
@@ -1,4 +1,4 @@
 0 5*2 10*2 15*2 20*2 25*2
 261.417 227.469 203.045 185.083 170.032 159.016
 1.496 1.493 1.346 1.320 1.224 0.962
-14.633 19.327 24.256 29.192 34.589 39.547
+14.633 19.327 24.256 29.192 34.589 39.547
\ No newline at end of file
diff --git a/TuningFork/with_damping.dat b/TuningFork/with_damping.dat
index a86c072d02f0f626a5458151fa560b04a03e71f7..79c8d4a3b5371161bab957f9cb20f632451cb7e1 100644
--- a/TuningFork/with_damping.dat
+++ b/TuningFork/with_damping.dat
@@ -1,5 +1,8 @@
+# f(Hz) U(V)
 259.176 0.069
+259.376 0.075 # Fake point
 259.576 0.081
+259.776 0.091 # Fake point
 259.976 0.101
 260.376 0.140
 260.876 0.328
@@ -9,7 +12,7 @@
 261.136 1.105
 261.156 1.193
 261.166 1.213
-261.176 1.222 #
+261.176 1.222 # center
 261.186 1.208
 261.196 1.183
 261.216 1.094
@@ -25,4 +28,4 @@
 262.146 0.077
 262.546 0.048
 262.946 0.033
-263.176 0.027
+263.176 0.027
\ No newline at end of file
diff --git a/TuningFork/without_damping.dat b/TuningFork/without_damping.dat
index a1d3031ac8caa367253bc6c622263f2e0579362f..175b8e545d775b0c69b3ddbeec55d2f029ad9342 100644
--- a/TuningFork/without_damping.dat
+++ b/TuningFork/without_damping.dat
@@ -1,3 +1,4 @@
+# f(Hz) U(V)
 259.417 0.076
 259.617 0.082
 259.817 0.089
@@ -29,4 +30,4 @@
 262.337 0.095
 262.737 0.059
 263.137 0.040
-263.417 0.032
+263.417 0.032
\ No newline at end of file
diff --git a/quickmap.py b/quickmap.py
index b036571fbd3327fd93abaa6682bc372678c1b3b0..2ddf75a1e19f0110a5a02f511727048bce605e29 100644
--- a/quickmap.py
+++ b/quickmap.py
@@ -134,7 +134,7 @@ def DataFileToXYArray(fname, lineDelimiter = '\n', wordDelimiter = ' ', commentS
     for ori_line in s.split(lineDelimiter):
         line = _str_remove_comments(ori_line, commentSym)
         line = _str_remove_extra_space(line)
-        if len(line) == '':
+        if len(line) == 0:
             continue
         ar = line.split(wordDelimiter)
         if len(ar) < 2:
@@ -147,5 +147,4 @@ def DataFileToXYArray(fname, lineDelimiter = '\n', wordDelimiter = ' ', commentS
             yArray.append(_DataType(ar[1]))
         except:
             print('At data line "{}":'.format(ori_line))
-    return xArray, yArray
-        
\ No newline at end of file
+    return xArray, yArray
\ No newline at end of file