diff --git a/example-data/test-datasets/3traj_5tpts_wide.csv b/example-data/test-datasets/3traj_5tpts_wide.csv
index 1cb63ce8e8144acb1bda8f4dedadc68bf7ac940e..aaca5bcf0d71e6e2e6dcc30aca90e98d7ec50936 100644
--- a/example-data/test-datasets/3traj_5tpts_wide.csv
+++ b/example-data/test-datasets/3traj_5tpts_wide.csv
@@ -1,4 +1,4 @@
-ID,  0,   20,   30,   40,   50
-1, 0.1, 0.11, 0.12, 0.13, 0.14
-2, 0.2, 0.21, 0.22, 0.23, 0.24
-3, 0.3, 0.31, 0.32, 0.33, 0.34
+group, id,  0,   10,   20,   30,   40
+1, 1, 0.1, 0.11, 0.12, 0.13, 0.14
+1, 2, 0.2, 0.21, 0.22, 0.23, 0.24
+1, 3, 0.3, 0.31, 0.32, 0.33, 0.34
\ No newline at end of file
diff --git a/example-data/test-datasets/3traj_5tpts_wide_2columnsOnly.csv b/example-data/test-datasets/3traj_5tpts_wide_2columnsOnly.csv
new file mode 100644
index 0000000000000000000000000000000000000000..b998b4b10e0f2acbf15d447226cddf7d798b33e9
--- /dev/null
+++ b/example-data/test-datasets/3traj_5tpts_wide_2columnsOnly.csv
@@ -0,0 +1,4 @@
+id,  0
+1, 0.1
+2, 0.2
+3, 0.3
\ No newline at end of file
diff --git a/example-data/test-datasets/3traj_5tpts_wide_noGroup.csv b/example-data/test-datasets/3traj_5tpts_wide_noGroup.csv
new file mode 100644
index 0000000000000000000000000000000000000000..54af64d74a4de48b18fed0dc1492a9e2d265e992
--- /dev/null
+++ b/example-data/test-datasets/3traj_5tpts_wide_noGroup.csv
@@ -0,0 +1,4 @@
+id, 0,   10,   20,   30,   40
+1, 0.1, 0.11, 0.12, 0.13, 0.14
+2, 0.2, 0.21, 0.22, 0.23, 0.24
+3, 0.3, 0.31, 0.32, 0.33, 0.34
\ No newline at end of file
diff --git a/example-data/test-datasets/3traj_5tpts_wide_noNumericTimeColumns.csv b/example-data/test-datasets/3traj_5tpts_wide_noNumericTimeColumns.csv
new file mode 100644
index 0000000000000000000000000000000000000000..4d18b35fe9172a8a0547fb1b36869e86ad32e49b
--- /dev/null
+++ b/example-data/test-datasets/3traj_5tpts_wide_noNumericTimeColumns.csv
@@ -0,0 +1,4 @@
+group, id,  a,   b,   20,   30,   40
+1, 1, 0.1, 0.11, 0.12, 0.13, 0.14
+1, 2, 0.2, 0.21, 0.22, 0.23, 0.24
+1, 3, 0.3, 0.31, 0.32, 0.33, 0.34
\ No newline at end of file
diff --git a/example-data/test-datasets/6traj_5tpts_2gr_wide.csv b/example-data/test-datasets/6traj_5tpts_2gr_wide.csv
new file mode 100644
index 0000000000000000000000000000000000000000..2e052082c9608f9a2cccd1425ff21467878faf10
--- /dev/null
+++ b/example-data/test-datasets/6traj_5tpts_2gr_wide.csv
@@ -0,0 +1,7 @@
+group, id,  0,   0.10,   0.20,   0.30,   0.40
+1, 1, 0.1, 0.11, 0.12, 0.13, 0.14
+1, 2, 0.2, 0.21, 0.22, 0.23, 0.24
+1, 3, 0.3, 0.31, 0.32, 0.33, 0.34
+2, 1, 0.14, 0.13, 0.12, 0.11, 0.10
+2, 2, 0.24, 0.23, 0.22, 0.21, 0.20
+2, 3, 0.34, 0.33, 0.32, 0.31, 0.30
\ No newline at end of file