monotonic

PURPOSE ^

SYNOPSIS ^

function fn=monotonic(f)

DESCRIPTION ^

CROSS-REFERENCE INFORMATION ^

This function calls: This function is called by:

SOURCE CODE ^

0001 
0002 function fn=monotonic(f)
0003 
0004 [x,y]=size(f);
0005 if x>y
0006     f=f';
0007 end
0008 marca=0;
0009 num_ptos=length(f);
0010 if num_ptos<20
0011    marca=1;
0012    npint=10;
0013    xx=linspace(1,num_ptos,num_ptos+(num_ptos-1)*npint);
0014    f=(interp1(linspace(1,num_ptos,num_ptos),f,xx));
0015    if sum(f==f(1))==length(f)
0016       f(1)=0;
0017       f(2)=0.8*f(3);
0018       f(3)=0.9*f(4);
0019    end
0020 end
0021 
0022 a=0;
0023 r=0;
0024 while (f(1)==0)|(f(length(f))==0)
0025    f=f-a;
0026    a=rand(1,1);
0027    f=f+a;
0028    r=1;
0029 end
0030 
0031 x1=[0 f];
0032 x2=[f 0];
0033 cre=x2-x1;
0034 cre(1:length(cre)-1);
0035 cond=(cre==0);
0036 
0037 if sum(cond)>0
0038    aa=0;
0039    c=[cond 0]-[0 cond];
0040    ini=find(c==1);
0041    fin=find(c==-1);
0042    longit=fin-ini;
0043    nn=length(ini);
0044    g=[1 fin];
0045    if fin(nn)<length(f)+1
0046        for i=1:nn,
0047           aa=[aa f(g(i):ini(i)-1) f(ini(i)-1)+linspace(1,longit(i),longit(i))*((f(fin(i))-f(ini(i)-1))/(longit(i)+1))];
0048        end
0049        aa=[aa f(fin(nn):length(f))];
0050        fn=aa(2:length(aa));
0051    else
0052        if length(fin)>1
0053           if (fin(length(fin)-1)+1)<ini(length(ini))
0054               for i=1:nn-1
0055                   aa=[aa f(g(i):ini(i)-1) f(ini(i)-1)+linspace(1,longit(i),longit(i))*((f(fin(i))-f(ini(i)-1))/(longit(i)+1))];
0056               end
0057               aa=[aa f(g(nn):ini(nn)-2) f(ini(nn)-2)+linspace(1,longit(nn),longit(nn))*((f(fin(nn)-1)-f(ini(nn)-2))/(longit(nn)+1))];
0058               fn=[aa(2:length(aa)) f(length(f))];
0059           else
0060               for i=1:nn-1
0061                   aa=[aa f(g(i):ini(i)-1) f(ini(i)-1)+linspace(1,longit(i),longit(i))*((f(fin(i))-f(ini(i)-1))/(longit(i)+1))];
0062               end
0063               aa=[aa aa(length(aa))+linspace(1,longit(nn),longit(nn))*((f(fin(nn)-1)-aa(length(aa)))/(longit(nn)+1))];
0064               fn=[aa(2:length(aa)) f(length(f))];
0065           end
0066        else
0067           for i=1:nn-1
0068                ini(i)
0069                aa=[aa f(g(i):ini(i)-1) f(ini(i)-1)+linspace(1,longit(i),longit(i))*((f(fin(i))-f(ini(i)-1))/(longit(i)+1))];
0070           end
0071           aa=[aa f(g(nn):ini(nn)-2) f(ini(nn)-2)+linspace(1,longit(nn),longit(nn))*((f(fin(nn)-1)-f(ini(nn)-2))/(longit(nn)+1))];
0072           fn=[aa(2:length(aa)) f(length(f))];
0073        end
0074    end
0075 else
0076     fn=f;
0077 end
0078 
0079 if r==1
0080    fn=fn-a;
0081 end
0082 
0083 if marca==1
0084    l=1;
0085    for i=1:num_ptos
0086        ff(i)=fn(l);
0087        l=l+npint+1;
0088    end
0089    fn=ff;
0090 end

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