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See the recommended documentation of this function

Aide de Scilab >> Fonctions Elémentaires > issquare

issquare

check if a variable is a square matrix

Calling Sequence

t=issquare(x)

Arguments

x

scalar,vector, matrix, hypermatrix, list, array of structures or cells

t

a boolean

Description

issquare(x) returns true if x is a square matrix (all dimensions of x are the same, with eventually singletons if x is an hpermatrix).

Note that issquare([]) returns false.

Examples

issquare(ones(10,10))
issquare(1)
issquare(["s" "t"; "t" "s"])
issquare(rand(2,1,2))
issquare(rand(2,2,3))
s = struct();
issquare(s) // Enmpty structure
clear s
s.a = %z;
s.b = 2;
issquare(s); // Scalar structure
clear s
s(1,2).a = 3;
s(1,3).b = %z;
issquare(s) // Row array of structures
clear s
s(2,1).a = "w"; 
s(3,1).b = %t;  
issquare(s) // Column array of structures
clear s
s(1,2).a = -2;
s(3,1).b = %pi;
issquare(s) // 2D not-square array of structures
clear s
s(2,2,2).a = %f; 
s(1,2,1).b = list(%e, %s);
issquare(s) // 3D (cubic) array of structures
clear s
s(2,1,2).a = 3;
s(1,1,2).b = "test";
issquare(s) // 3D array of structures (with a singleton dim)

See also

  • isscalar — check if a variable is a scalar.
  • isrow — check if a variable is a row
  • iscolumn — check if a variable is a column
  • ismatrix — check if a variable is a matrix
  • isempty — check if a variable is an empty matrix or an empty list

History

VersionDescription
5.5.0 Function issquare introduced.
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Copyright (c) 1989-2012 (INRIA)
Copyright (c) 1989-2007 (ENPC)
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Last updated:
Thu Oct 02 13:54:30 CEST 2014