Scilab Function
Last update : 00/00/0000
size - size of objects
Calling Sequence
- y=size(x [,sel])
- [nr,nc]=size(x)
Parameters
-
x: matrix (including transfer matrix) or list or linear system (syslin)
-
y: 1x2 integer vector or integer number
-
sel: a scalar or a character string
-
nr,nc: two integers
Description
-
Applied to :a matrix (constant, polynomial, string, boolean, rational)
x, with only one lhs argument size
returns a 1x2 vector [number of rows,
number of columns]. Called with LHS=2, returns nr,nc
= [number of rows, number of columns]. sel may be
used to specify what dimension to get:
-
1 or 'r': to get the number of rows
-
2 or 'c': to get the number of columns
-
'*': to get the product of rows and column numbers
-
Applied to:a list it returns the number of elements. In this case only y=size(x) syntax can be used
-
Applied to:
a linear system, y=size(x) returns in y
the (row) vector [number of outputs, number if inputs] i.e. the
dimension of the corresponding transfer matrix. The syntax
[nr,nc]=size(x) is also valid (with
(nr,nc)=(y(1),y(2)). If x is a linear
system in state-space form, then [nr,nc,nx]=size(x)
returns in addition the dimension nx of the
A matrix of x.
-
label='Applied to:'>
an hypermatrix y=size(x) returns the vector of
hypermatrix dimensions. [n1,n2,...nn]=size(x)
returns the hypermatrix dimensions. ni=size(x,i)
returns the ith dimension and size(x,'*')
returns the product of dimensions.
Examples
[n,m]=size(rand(3,2))
[n,m]=size(['a','b';'c','d'])
x=ssrand(3,2,4);[ny,nu]=size(x)
[ny,nu]=size(ss2tf(x))
[ny,nu,nx]=size(x)
See Also
length, syslin,