How to resolve error"index exceeds matrix dimensions."

Hi, Please i have a problem in my code matlab, The error is: index exceeds matrix dimensions. This is my code:

function [Pmacro Pfemto] = UAQP_power_control_method(handles)

Pmacro_dbm = str2num(get(handles.edit1,'String'));
Pmacro = (10^(Pmacro_dbm / 10)) / 1000;
Pfemto_max_dbm = str2num(get(handles.edit2,'String'));
Pfemto_max = (10^(Pfemto_max_dbm / 10)) / 1000;
Pfemto_def_dbm = str2num(get(handles.edit4,'String'));
Pfemto_def = (10^(Pfemto_def_dbm / 10)) / 1000;
target_SINR = str2double(get(handles.edit5,'String'));
N2 = str2double(get(handles.edit15,'String'));
N3 = str2double(get(handles.edit13,'String'));
coordVectors = get(handles.figure1, 'UserData');
numOfFemtocells = min(size(coordVectors.femt_x, 2), size(coordVectors.femt_y, 2));
numOfMacrocells = 1;
P_min=-10;
SINR_th=0.7;
N1=3.0;
P0=0.0;
o2=0.4;
o1=0.9;
o3=0.1;
Q21=0.7;
Q31=0.3;
Q22=0.6;
Q32=0.2;
D=0.7;
Pfemto = zeros(1,numOfFemtocells);
            a=o2*Q21;
            b=o2*Q22;
            c=o2*Q31;
            d=o2*Q32;

while N2~=0 || N3~=0
    for i=1:numOfFemtocells
        currentSINR = findRangeSINR(handles);
        SINR(i)=target_SINR/currentSINR(i);
         if (N1==0 && N2==0)
           Pfemto(i)=P0+(N1*o1);     
         else
             if (SINR(i)>SINR_th)
            Pfemto(i)=P0+(N1*o1)+sum(a(1:N2))+(sum(c(1:N3))*D);  
               else
            Pfemto(i)=P0+(N1*o1)+sum(b(1:N2))+(sum(d(1:N3))*D);
             end% fin de 2eme if
        end % fin du 1er if     
    end % fin du for   
end % fin du while
end %fin du fonction

[Birdman]

Error in which line?

[brahmi ibtissem]

the error in this line: Pfemto(i)=P0+(N1*o1)+sum(a(1:N2))+(sum(c(1:N3))*D);

Answer 1

[Torsten]

a,b,c and d are scalars ; so sum(a(1:N2)),sum(b(1:N2)), sum(c(1:N3)) and sum(d(1:N3)) won't work for values of N2 and N3 greater than 1.

Best wishes

Torsten.

[brahmi ibtissem]

So what is the solution, how i will declare a, b , c and d?

[Torsten]

a and b must be arrays of length N2, c and d must be arrays of length N3, e.g.

a = o2*Q21*ones(N2,1);
b = o2*Q22*ones(N2,1);
c = o2*Q31*ones(N3,1);
d = o2*Q32*ones(N3,1);

Best wishes

Torsten.

[brahmi ibtissem]

Thank you so much :)

[Guillaume]

So what is the solution, how i will declare a, b , c and d?

That's really for you to tell us rather than the other way around. We don't know what you intended these (poorly named) variables to be.

it is very unlikely that

a = o2*Q21*ones(N2,1);
b = o2*Q22*ones(N2,1);
c = o2*Q31*ones(N3,1);
d = o2*Q32*ones(N3,1);

is what you intended since these lines just create vectors of identical values. If that was indeed the intent, then you could just leave them as scalar and rewrite the latter expressions as

     Pfemto(i)=P0+(N1*o1)+a*N2+c*N3*D; 
  else
     Pfemto(i)=P0+(N1*o1)+b*N2+d*N3*D;