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A. TRANSLATION BETWEEN MATLAB µ-TOOLS AND Xµ 393
Description µ-Tools Function Xmath/Xµ equivalent
form system pck system
decompose system unpck abcd
form system nd2sys transfer function data objects
form system zp2sys transfer function data objects
decompose system sys2pss dynamic system data objects
form system pss2sys dynamic system data objects
random system sysrand randsys
generate filters mfilter butterworth, chebyshev
fit transfer functions drawmag fitsys, tfid
The µ-Tools drawmag function provides an interactive graphical interface. There is
currently no equivalent in Xµ. The equivalent underlying data fitting algorithm can be
found in the Xµ function fitsys.
varying/pdm Functions
The equivalent functions for construction and manipulation of pdm data objects are
shown below.
Description µ-Tools Function Xmath/Xµ equivalent
form varying vpck pdm
break up varying vunpck makematrix
get ivs. getiv domain
join varying tackon concatseg, insertseg, mergeseg
sort by iv. sortiv mergeseg
select by iv. value xtract extractseg, indexlist, find
select by index xtracti indexing by pdm(i)
scale iv. scliv domain, pdm
compare ivs. indvcmp check
random varying varyrand randpdm
As an aside, note that the sort function in Xmath sorts each column of each matrix in a
pdm, rather than sorting the domain.