How to resolve error"index exceeds matrix dimensions."

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brahmi ibtissem
brahmi ibtissem 2018-1-4
评论： Guillaume 2018-1-4
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

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回答（1 个）

Torsten
Torsten 2018-1-4
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.
  4 个评论
显示 2更早的评论
Guillaume
Guillaume 2018-1-4
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;

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