simulink - How can i save previous value of variable in Matlab Function -


hello know how save previous value of output variable in matlab function.

function y = fcn(x,d,yp) yp=0;  %here want initialize value @ start of simulation if (x-yp<=d)     y=x; else      y=yp + d; end yp=y;  % here want load output value

thanks help

using persistent variable correct way go, found out, cannot use varargin in matlab function block. trick check whether variable empty or not, in:

function y = fcn(x,d,yp)  persistent yp  if isempty(yp)    yp=0;  %only if yp empty, i.e. @ beginning of simulation end  if (x-yp<=d)     y=x; else      y=yp + d; end  yp=y;  % here want load output value

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