addition of LTI models scalar adjoint. See pertransposition append append array dimensions arrays. See LTI arrays arrays. See LTI arrays balancing realizations building LTI arrays canonical realizations cell array cell array concatenation, model horizontal LTI arrays state-space model order, effects on vertical connection parallel series constructor functions, LTI objects continuous-time conversion, model automatic between model types between model types continuous to discrete (c2d) discrete to continuous (d2c) discrete to continuous (d2c) with negative real poles FRD model, to resampling SS model, to state-space, to TF model, to ZPK model, to d2d delays combining discrete-time models discretization I/O I/O I/O information, retrieving input input output output output Padé approximation supported functionality delays input deletion parts of LTI arrays parts of LTI models denominator property specification specification specification value descriptor systems. See state-space models, descriptor digital filter filt specification dimensions array I/O discrete-time models resampling See also LTI models discretization discretization delay systems first-order hold matched poles/zeros Tustin method zero-order hold dual. See transposition extraction LTI arrays, in LTI models, in feedthrough gain filt first-order hold (FOH) with delays FRD (frequency response data) objects FRD (frequency response data) objects conversion to frequencies indexing by referencing by uses frequency response gain feedthrough property LTI properties gain get group. See I/O groups hasdelay I/O concatenation delays delays delays dimensions LTI arrays groups referencing models by group name names names conflicts, naming referencing models by relation indexing into LTI arrays single index access inheritance input delays delays delays groups names number of inputs InputDelay. See delays InputGroup InputGroup conflicts, naming See also I/O groups InputName InputName conflicts, naming See also I/O names inversion model ioDelayMatrix. See delay LTI (linear time-invariant) LTI arrays 1, LTI arrays 1, accessing models analysis functions array dimensions building building LTI arrays building with rss building with tf, zpk, ss, and frd concatenation conversion, model.See conversion deleting parts of dimensions, size, and shape extracting subsystems indexing into interconnection functions model dimensions operations on dimension requirements special cases reassigning parts of size stack LTI models addition scalar building characteristics concatenation effects on model order horizontal vertical continuous conversion conversion continuous/discrete See also conversion, model creating discrete discrete discretization, matched poles/zeros empty empty functions, analysis I/O group or channel name, referencing by interconnection functions inversion model data, accessing modifying multiplication operations precedence rules See also operations proper transfer function resizing subsystem, modifying subtraction type LTI objects LTI objects constructing methods properties. See LTI properties See also LTI models LTI properties LTI properties LTI properties accessing property values (get) accessing property values (get) displaying properties generic properties I/O groups. See I/O, groups I/O names. See I/O, names inheritance model-specific properties online help (ltiprops) property names property names property values property values setting sample time variable property map, I/O methods MIMO MIMO model building parallel connection series connection model dynamics, function list modeling. See model building multiplication scalar Notes numerator property specification specification specification value object-oriented programming objects. See LTI objects operations on LTI models addition append arithmetic concatenation concatenation concatenation extracting a subsystem inversion multiplication overloaded pertransposition precedence resizing subsystem, extraction subtraction transposition output delays delays delays groups names number of outputs OutputDelay. See delays OutputGroup OutputGroup group names, conflicts See also I/O, groups OutputName conflicts, naming See also I/O, names Padé approximation (pade) parallel connection pertransposition poles property precedence rules precedence rules proper transfer function properties sample time variable properties. See LTI properties realization state coordinate transformation realizations balanced canonical resampling response, I/O rss building an LTI array with sample time sample time sample time sample time sample time accessing resampling setting unspecified series connection set SISO SISO SS ss SS models SS objects. See state-space models stack state matrix names transformation vector state-space models state-space models balancing conversion to See also conversion descriptor descriptor matrices model data quick data retrieval realizations specification ss transfer functions of subsystem subsystem subsystem operations on LTI models subsystem, modifying subtraction Td. See delays tf TF objects. See transfer functions tfdata output, form of time delays. See delays totaldelay transfer functions transfer functions constructing with rational expressions conversion to denominator discrete-time discrete-time DSP convention filt MIMO MIMO numerator quick data retrieval specification static gain tf TF object, display for variable property variable property transposition triangle approximation Ts. See sample time Tustin approximation with frequency prewarping Userdata variable property zero-order hold (ZOH) with delays zero-pole-gain (ZPK) models zero-pole-gain (ZPK) models conversion to MIMO MIMO quick data retrieval specification zpk zeros property zpk ZPK objects. See zero-pole-gain (ZPK) models zpkdata output, form of