vabs, vimag, vreal, vfloor, vceil (Mu Analysis and Synthesis Toolbox)

Mu Analysis and Synthesis Toolbox

vabs, vimag, vreal, vfloor, vceil

Perform element-by-element operations on CONSTANT and VARYING matrices

Syntax

matout = vabs(matin) 
matout = vimag(matin) 
matout = vreal(matin) 
matout = vfloor(matin) 
matout = vceil(matin)

Description
This set of commands allows standard element-by-element operations on CONSTANT/VARYING matrices. These commands are identical to abs, imag, real, floor, and ceil but also work on VARYING matrices.

vabs
element-by-element absolute value of a VARYING matrix

vimag
element-by-element imaginary part of a VARYING matrix

vreal
element-by-element real part of a VARYING matrix

vfloor
element-by-element floor of a VARYING matrix

vceil
element-by-element ceiling of a VARYING matrix

`vabs`	element-by-element absolute value of a VARYING matrix
`vimag`	element-by-element imaginary part of a VARYING matrix
`vreal`	element-by-element real part of a VARYING matrix
`vfloor`	element-by-element floor of a VARYING matrix
`vceil`	element-by-element ceiling of a VARYING matrix

A general element-by-element command, vebe, allows all standard arithmetic MATLAB element commands that have only one input argument.

Examples
Construct a complex VARYING matrix and find the magnitude of the entries and the real parts.

see(matin)
1 row                        2 columns
iv = .2
    0.2190 - 0.4379i0.6789 - 1.3577i
iv = .7
    0.0470 - 0.0941i0.6793 - 1.3586i
see(vabs(matin))
1 row                        2 columns
iv = .2
0iv = .7
    0.10521.5190
see(vreal(matin))
1 row2 columns
iv = .2
    0.21900.6789
iv = .7
    0.04700.6793

Use pkvnorm to find the maximum element magnitude of the VARYING matrix.

pkvnorm(matin,inf)
1 row2 columns
ans =
    1.5190

This agrees with the maximum magnitude of matin(1,1) associated with the second independent variable.

See Also
vdet, vdiag, vebe, veval

unum, xnum, ynum vdet, vdiag, vexpm, vrcond