Difference between revisions of "ApCoCoA-1:Num.AppKer"

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Mat([
 
Mat([
   [<quotes>-0.408</quotes>, <quotes>0.816</quotes>, <quotes>-0.408</quotes>]
+
   ["-0.408", "0.816", "-0.408"]
 
])
 
])
 
-------------------------------
 
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Mat([
 
Mat([
   [<quotes>-0.000</quotes>],
+
   ["-0.000"],
   [<quotes>0.000</quotes>],
+
   ["0.000"],
   [<quotes>0.000</quotes>]
+
   ["0.000"]
 
])
 
])
 
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Latest revision as of 13:46, 29 October 2020

This article is about a function from ApCoCoA-1.

Num.AppKer

Calculates the approximate kernel of a matrix.

Syntax

Num.AppKer(Matrix:MAT, Epsilon:RAT):MAT

Description

Please note: The function(s) explained on this page is/are using the ApCoCoAServer. You will have to start the ApCoCoAServer in order to use it/them.

Calculates the approximate Kernel of a Matrix with respect to the residual error Epsilon.

  • @param Matrix A rational matrix.

  • @param Epsilon The target residual error.

  • @return The approximate kernel.

Example

M := Mat([[1,2,3],[4,5,6],[7,8,9]]);
AppKer := Num.AppKer(M,0.01);
Dec(AppKer,3);
Dec(M * Transposed(AppKer),3);
-- CoCoAServer: computing Cpu Time = 0.016
-------------------------------
Mat([
  ["-0.408", "0.816", "-0.408"]
])
-------------------------------
Mat([
  ["-0.000"],
  ["0.000"],
  ["0.000"]
])
-------------------------------



See also

Num.SVD