Extra ratios column for decimals

Author: scheinerman

Project.toml

@@ -12,6 +12,7 @@ LatexPrint = "d2208f48-c256-5759-9089-c25ed2a93924"
 LinearAlgebra = "37e2e46d-f89d-539d-b4ee-838fcccc9c8e"
 LinearAlgebraX = "9b3f67b0-2d00-526e-9884-9e4938f8fb88"
 PrettyTables = "08abe8d2-0d0c-5749-adfa-8a2ac140af0d"
+Printf = "de0858da-6303-5e67-8744-51eddeeeb8d7"
 Test = "8dfed614-e22c-5e08-85e1-65c5234f0b40"
 
 [compat]
@@ -23,5 +24,6 @@ LatexPrint = "1"
 LinearAlgebra = "1"
 LinearAlgebraX = "0.2"
 PrettyTables = "3"
+Printf = "1"
 Test = "1"
 julia = "1"

docs/make.jl

@@ -12,7 +12,7 @@ makedocs(;
         # "Solving LPs" => "solve.md",
         # "Dual LP" => "dual.md",
         "Other Functions" => "other.md",
-        "API" => "api.md"
+        "API" => "api.md",
     ],
     sitename="SimplexTableaux",
 )

src/Ratios.jl

@@ -32,10 +32,18 @@ end
 function _ratio_matrix_str(T::Tableau, col::Int)
     RM = _ratio_matrix(T, col)
     result = _pretty_string.(RM)
+    blank = "---"
+
+    decimals = [blank for _ in 1:T.n_cons]
 
     for i in 1:T.n_cons
+        if RM[i, 4] ≥ 0
+            decimals[i] = @sprintf "%.7f" Float64(RM[i, 4])
+        end
+
         if RM[i, 4] == 1//0
-            result[i, 4] = "---"
+            result[i, 4] = blank
+            decimals[i] = blank
         end
     end
 
@@ -44,6 +52,8 @@ function _ratio_matrix_str(T::Tableau, col::Int)
         i = 0
     end
 
+    result = hcat(result, decimals)
+
     return result, i
 end
 
@@ -55,7 +65,7 @@ Display a table for determining a valid pivot for `T` in column `col`.
 function ratios(T::Tableau, col::Int)
     RMS, i = _ratio_matrix_str(T, col)
 
-    header = ["Constraint", "Column $col", "RHS", "Ratio"]
+    header = ["Constraint", "Column $col", "RHS", "Ratio", "Decimal"]
     title = "Ratios for column $col headed by " * _pretty_string(T[0, col])
     sub = ""
     if T[0, col] < 0

src/SimplexTableaux.jl

@@ -7,6 +7,7 @@ using LatexPrint
 using LinearAlgebra
 using LinearAlgebraX
 using PrettyTables
+using Printf
 
 import Base: getindex, show
 import LatexPrint: latex_form