Am I doing something wrong?
require'jmf'
unmapall_jmf_''
D =: <"0
D p=.12.34(0"0)} i.3 4
+-----+-+--+--+
|12.34|1|2 |3 |
+-----+-+--+--+
|4 |5|6 |7 |
+-----+-+--+--+
|8 |9|10|11|
+-----+-+--+--+
'test.x' (1!:2<)~ 3!:1 p
D 3!:2 [1!:1<'test.x'
+-----+-+--+--+
|12.34|1|2 |3 |
+-----+-+--+--+
|4 |5|6 |7 |
+-----+-+--+--+
|8 |9|10|11|
+-----+-+--+--+
((3!:0 p);}.$p) map_jmf_'data';'test.x'
D data
+-----------+------------+------------+-----+
|1.6976e_313|4.24399e_314|8.48798e_314|12.34|
+-----------+------------+------------+-----+
|1 |2 |3 |4 |
+-----------+------------+------------+-----+
|5 |6 |7 |8 |
+-----------+------------+------------+-----+
D data =: p a:}data
+-----+-+--+--+
|12.34|1|2 |3 |
+-----+-+--+--+
|4 |5|6 |7 |
+-----+-+--+--+
|8 |9|10|11|
+-----+-+--+--+
unmapall_jmf_''
0
((3!:0 p);}.$p) map_jmf_'data';'test.x'
D data
+-----+-+--+--+
|12.34|1|2 |3 |
+-----+-+--+--+
|4 |5|6 |7 |
+-----+-+--+--+
|8 |9|10|11|
+-----+-+--+--+
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