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//
// 08.06.18 (N)
// 08.08.24
// 08.10.05
// 08.12.18
// 09.03.12
// 09.12.31 (gsort)
// 13.10.19 (__ added to variables)
// 14.10.24 N,D,E => N__ ,...
// 14.12.11 Assign used, and debugged (Exfun )
// 15.11.16 N changed to number of intervals
// 16.12.13 in case of X1=X2
function P__=Plotdata(varargin)
global XMIN XMAX YMIN YMAX
Eps__=10^(-5);
Fnstr__=varargin(1); Is__=2;
if type(Fnstr__)==13
Fnflg__=1;
Fnarg__=varargin(Is__);
if type(Fnarg__)==13
Fnflg__=Fnflg__+1;
Is__=Is__+1;
end;
else
Fnflg__=0;
end;
Rgstr__=varargin(Is__); Is__=Is__+1;
K__=mtlb_findstr(Rgstr__,'=');
if length(K__)>0
Tmp__=strsplit(Rgstr__,[K__-1,K__]);
Vname__=Tmp__(1,1);
Rng__=evstr(Tmp__(3,1));
else
Vname__=Rgstr__;
Rng__=[XMIN,XMAX];
end;
N__=50; // Numpoints
E__=[]; // Exclusions
Exfun__=''; // Exclusion function
D__=%inf; // Discont
for I__=Is__:length(varargin)
Tmp__=varargin(I__);
Lhs__=part(Tmp__,1);
K__=mtlb_findstr(Tmp__,'=');
Tmp1__=part(Tmp__,K__+1:length(Tmp__));
if mtlb_findstr(Tmp__,Vname__)==[]
Str__=Lhs__+'__='+Tmp1__;
execstr(Str__);
else
Exfun__=Tmp1__;
end;
end;
X1__=Rng__(1); X2__=Rng__(2);
// dx__=(X2__-X1__)/(N__-1);
dx__=(X2__-X1__)/(N__); // 15.11.16
if Fnflg__==0
Str__=Assign(Fnstr__,Vname__,'x__');
end;
if abs(dx__)<Eps__ then // 16.12.13
x__=X1__;
P__=[X1__,evstr(Str__)];
return;
end;
Exfun__=Assign(Exfun__,Vname__,'x__');
if length(Exfun__)>0 then // 14.12.11
Tmp__=mtlb_findstr(Exfun__,"x__");
if length(Tmp__)==0 then
E__=evstr(Exfun__);
Exfun__="";
end
end
P__=[];
E__=gsort(E__);
E__=E__(length(E__):-1:1);
E__=[E__,%inf];
Tmp__=gsort(E__);
E__=Tmp__(length(Tmp__):-1:1);
Ke__=1;
for x__=X1__:dx__:X2__
if Exfun__~=''
Tmp__=evstr(Exfun__);
if abs(Tmp__)<Eps__
P__=[P__;%inf,%inf];
continue;
end;
end;
Pa__=[];
if x__-E__(Ke__)<-Eps__
if Fnflg__==0
Pa__=[x__,evstr(Str__)];
else
if Fnflg__==1
Pa__=[x__,Fnstr__(x__)];
else
Pa__=[x__,Fnstr__(Fnarg__,x__)];
end;
end;
end;
if abs(x__-E__(Ke__))<=Eps__
if P__~=[] & P__(size(P__,1),:)~=[%inf,%inf]
Pa__=[%inf,%inf];
end
end
if x__-E__(Ke__)>Eps__
if Fnflg__==0
Pa__=[x__,evstr(Str__)];
else
if Fnflg__==1
Pa__=[x__,Fnstr(x__)];
else
Pa__=[x__,Fnstr__(Fnarg__,x__)];
end;
end;
Ke__=Ke__+1;
end
if Pa__~=[]
if Pa__(1)==%inf
P__=[P__;Pa__]
elseif P__==[]
P__=[Pa__];
else
Tmp__=P__(size(P__,1),:);
if Tmp__(1)==%inf
P__=[P__;Pa__];
elseif norm(Tmp__-Pa__)<D__
P__=[P__;Pa__];
else
P__=[P__;%inf,%inf;Pa__];
end
end
end
end;
Tmp__=size(P__,1);
if P__(Tmp__,1)==%inf
P__=P__(1:Tmp__-1,:);
end;
endfunction;
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