Guides/Language FAQ/Row Sum
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How do I get the row sum of a table?
]t=. ?.2 3$5 4 1 3 1 0 3 +/t NB. this is column sum 5 1 6
How do I get the row sum of a table?
Use Rank adverb
+/"1 t 8 4 +/ rows t 8 4 +/ items t 8 4
Explanation
+/'s verb rank is _, which means + is inserted in between items (the highest rank cells). You need a verb with rank 1, which means + is inserted between atoms for each line.
Contributed by Oleg Kobchenko