Fix column-major ordering of multidimensional text waves

CHANGELOG

@@ -1,3 +1,5 @@
+Unreleased
+ - fix: preserve column-major ordering of multidimensional text waves (#25)
 0.5.13
  - fix: thread safety issues and add better concurrent tests (#27)
 0.5.12

igor2/binarywave.py

@@ -602,7 +602,7 @@ def post_unpack(self, parents, data):
         wdata = _numpy.array(strings)
         shape = [n for n in wave_header['nDim'] if n > 0] or (0,)
         try:
-            wdata = wdata.reshape(shape)
+            wdata = wdata.reshape(shape, order='F')
         except ValueError:
             logger.error(
                 'could not reshape strings from %s to %s',

tests/data/README

@@ -2,3 +2,8 @@
 
 polar-graphs-demo.pxp was distributed with IGOR Pro 5.04 as
   Examples/Graphing Techniques/Obsolete/Polar Graphs Demo.pxp
+
+text3.ibw was provided by jbemis99 in issue #25:
+https://github.com/AFM-analysis/igor2/issues/25
+The 3-by-2 text wave contains columns (cat, dog, fish) and
+(tiger, wolf, shark), as shown by the reporter in Igor Pro.

tests/test_ibw.py

@@ -1,4 +1,5 @@
 from helper import assert_equal_dump_no_whitespace_no_byte, dumpibw
+from helper import data_dir, loadibw
 
 
 def test_ibw01():
@@ -629,3 +630,14 @@ def test_ibw_10():
                               'whpad4': 0}}}
     """
     assert_equal_dump_no_whitespace_no_byte(act, exp)
+
+
+def test_multidimensional_text_wave():
+    data = loadibw(data_dir / 'text3.ibw')['wave']['wData']
+
+    assert data.shape == (3, 2)
+    assert data.tolist() == [
+        [b'cat', b'tiger'],
+        [b'dog', b'wolf'],
+        [b'fish', b'shark'],
+    ]