d2c
PURPOSE 
% Convert a discrete (sub)system into a purely continuous one.
SYNOPSIS 
function csys = d2c (sys, opt)
DESCRIPTION 
CROSS-REFERENCE INFORMATION 
This function calls:
- c2d %
- is_digital % Return nonzero if system is digital.
- is_sample % Return true if @var{ts} is a valid sampling time
- ss % Create system structure from state-space data. May be continuous,
- strappend % Append string @var{suffix} to each string in the list @var{strlist}.
- sys2ss % Extract state space representation from system data structure.
- sysdimensions % return the number of states, inputs, and/or outputs in the system
- sysgetsignals % Get signal names from a system
- sysgettsam % Return the sampling time of the system @var{sys}.
- syssetsignals % change the names of selected inputs, outputs and states.
- sysupdate % Update the internal representation of a system.
This function is called by:
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