X-Git-Url: http://git.shiar.nl/sheet.git/blobdiff_plain/4573100ac0fbb9ba52dc3f48383de3fc5a960e6f..2a99bcdadec88d7483903e2c8420ad3e78fcb805:/apl.inc.pl

diff --git a/apl.inc.pl b/apl.inc.pl
index 16f098f..3559372 100644
--- a/apl.inc.pl
+++ b/apl.inc.pl
@@ -15,6 +15,8 @@ use utf8;
 ["!", "binomial\nNumber of combinations of B taken A at a time", "factorial\nProduct of integers 1 to B"],
 ["?\nq", "deal\nA distinct integers selected randomly from the first B integers", "roll\nOne integer selected randomly from the first B integers"],
 
+undef,
+
 # logical
 ["∼\nt", "difference\nItems found in B are removed from A", "not\nLogical: ∼1 is 0, ∼0 is 1"],
 ["∨\n9", "or\nLogic: 0 if A and B are 0; 1 otherwise"],
@@ -32,6 +34,9 @@ use utf8;
 ["≡\n:", "match\n1 if arguments are the same in every respect, 0 if not", "depth\nLevel of nesting: 1 + maximum array depth or 0 if scalar"],
 ["≢\n\"", "not match\n1 if arguments are different if any respect, 0 if not", "tally\nNumber of major cells in B, equivalent to {⍬⍴ (⍴⍵),1}"],
 
+undef,
+
+# vector
 ["∈\ne", "membership\n1 for elements of A present in B; 0 where not", "enlist\nEvery element in B as simple vector"],
 ["⍷\nE", "find\nElements of A within B, returning 1 if the start of A is found in B"],
 ["⌷\nL", "index", "materialise"],
@@ -46,6 +51,8 @@ use utf8;
 ["⋄\n`", "statement separator\nSeparates multiple statements on a single line"],
 ["↑\ny", "take\nSelect the first (or last) A elements of B according to ×A", "nub"],
 ["↓\nu", "drop\nRemove the first (or last) A elements of B according to ×A", "split"],
+
+# set
 ["⊂\nz", "partition\nDivide B into an array of vectors according to specification in A", "enclose\nProduce a scalar of vector B"],
 ["⊃\nx", "pick\nSelect item A from vector B", "disclose\nProduce an array made up of the items in B"],
 ["⊆", "subset\nElements in both A and B: (∧/A∈B)∧(∧/B∈A)"],
@@ -54,11 +61,14 @@ use utf8;
 [",", "catenate\nElements of B appended to the elements of A", "ravel\nReshapes B into a vector"],
 ["⍪\n<", "catenate first\nCatenate across the first axis"],
 
+# transform
 ["⌹\n+", "matrix divide\nSolution to system of linear equations, multiple regression Ax = B", "matrix inverse\nInverse of matrix B"],
 ["⌽\n%", "rotate first\nThe elements of B are rotated A positions", "reverse first\nReverse elements of B along last axis"],
 ["⊖\n&", "rotate\nThe elements of B are rotated A positions along the first axis", "reverse\nReverse elements of B along first axis"],
 ["⍉\n^", "general transpose\nThe axes of B are ordered by A", "monadic transpose\nReverse the axes of B"],
 
+undef,
+
 # sorting and coding
 ["⍋\n\$", "grade up\nArrange B according to collating sequence specified by A", "grade up\nIndices of B which will arrange B in ascending order"],
 ["⍒\n#", "grade down\nArrange B according to inverse collating sequence specified by A", "grade down\nIndices of B which will arrange B in descending order"],
@@ -83,6 +93,8 @@ use utf8;
 ["'\nk"],
 ["⍙\n>"],
 
+undef,
+
 # operators
 ["\\","expand\nInsert zeros (or blanks) in B corresponding to zeros in A", "scan\nRunning sum across B"],
 ["⍀\n.", "expand first", "scan first\nRunning sum down B"],