Naming Conventions
	Scalar	Vector	Matrix	Any rank	Non- scalar
Boolean	`BS`	`BV`	`BM`	`BA`	`BN`
Integer	`IS`	`IV`	`IM`	`IA`	`IN`
Float	`FS`	`FV`	`FM`	`FA`	`FN`
Numeric	`NS`	`NV`	`NM`	`NA`	`NN`
Character	`CS`	`CV`	`CM`	`CA`	`CN`
Enclosed vector	`ES`	`EV`	`EM`	`EA`	`EN`
enclosed Text vector	`TS`	`TV`	`TM`	`TA`	`TN`
Simple	`SS`	`SV`	`SM`	`SA`	`SN`
Any	`AS`	`AV`	`AM`	`AA`	`AN`
phrase e.g.: `.X...Y. ⍝ X←BS; Y←IV`
combinations: use `ISV` for Integer scalar`∨`vector
`B3`, `I4` &c. to specify higher ranks.

PhraseBook/FindInMatrix

This phrase is searching a pattern in a matrix an return pairs of (row, column) in a vector for every hit.

      ⊂[⎕IO+1]⍉(⍴AM)⊤v/⍳⍴v←AV⍷,AM

Examples

      ⎕FX ⍕2 1⍴'r←AM FindInMatrix AV;b' '  r←⊂[⎕IO+1]⍉(⍴AM)⊤v/⍳⍴v←AV⍷,AM'
      M←''
      M←M,⊂'January'  
      M←M,⊂'February' 
      M←M,⊂'March'    
      M←M,⊂'April'    
      M←M,⊂'May'      
      M←M,⊂'June'     
      M←M,⊂'July'     
      M←M,⊂'August'   
      M←M,⊂'September'
      M←M,⊂'October'  
      M←M,⊂'November' 
      M←M,⊂'December' 
      M←⊃M
      M FindInMatrix 'em'
 (8 4) (10 3) (11 3)
      M FindInMatrix'nuar'
 0 2

Compatibility

Checked with: APLX, NARS2000

Test Cases

Replace "PhraseName" accordingly Show Hide test cases test cases

Test;M
 ⎕IO←0      ⍝ You may change this; however, zero IS the default in the Phrasebook
⍝⎕ML←3      ⍝ Enable this line in Dyalog APL if appropriate
  ⎕FX ⍕2 1⍴'r←AM FindInMatrix AV;b' 'r←↓⍉(⍴AM)⊤v/⍳⍴v←AV⍷,M'
  M←''
  M,←⊂'January'  
  M,←⊂'February' 
  M,←⊂'March'    
  M,←⊂'April'    
  M,←⊂'May'      
  M,←⊂'June'     
  M,←⊂'July'     
  M,←⊂'August'   
  M,←⊂'September'
  M,←⊂'October'  
  M,←⊂'November' 
  M,←⊂'December' 
  M←⊃M
⍝ ---- Start Test cases (do not delete this!)
 (,⊂0 2) ≡ M FindInMatrix'nuary'
 (,0) ≡ ⍴M FindInMatrix'nuaraAAA'

For details see the PhraseBook/TestCasesGuidelines.

Test my code, both Examples and Test Cases.