error in my matlab code

Hi, I have a problem in my code matlab. The error is

"For colon operator with char operands, first and last operands must be char.

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 = get(handles.edit15,'String');
N3 = 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=N2*o2*Q21;
            b=N2*o2*Q22;
            c=N2*o2*Q31;
            d=N2*o2*Q32; 
while N2~=0 || N3~=0     
     for i=1:n 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 du 1er if     
    end % fin du for   
end % fin du while
end %fin du fonction

Answer 1

[Walter Roberson]

You have

for i=1:n

but there is no variable named n assigned to in your code.

You have

Pfemto(i)=P0+(N1*o1)+sum(a(1:N2))+(sum(c(1:N3))*D);

which use N2 and N3 as the endpoints of a : operation. But you defined

N2 = get(handles.edit15,'String');
N3 = get(handles.edit13,'String');

so N2 and N3 are character vectors, not numeric. You should have used str2num() on them like you did for the other handles whose values you are using.

Note: str2double() is better than str2num() when you are converting values that are intended to be scalar numbers.

[brahmi ibtissem]

Thank you so much,

I dont have for i=1:n in my code.

I change:

N2 = str2double(get(handles.edit15,'String'));
N3 = str2double(get(handles.edit13,'String'));

but i receive this error:

Index exceeds matrix dimensions.

Error in UAQP_power_control_method (line 37)
            Pfemto(i)=P0+(N1*o1)+sum(a(1:N2))+(sum(c(1:N3))*D);

can you help me to resolve this prolem please?

[brahmi ibtissem]

This is my code now:

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=N2*o2*Q21;
            b=N2*o2*Q22;
            c=N2*o2*Q31;
            d=N2*o2*Q32;
while N2~=0 || N3~=0
    for i=1:numOfFemtocells
        currentSINR = findRangeSINR(handles);
        SINR(i)=target_SINR/currentSINR(i);
        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 du 1er if     
    end % fin du for   
end % fin du while
end %fin du fonction

[Walter Roberson]

You define N2, o2, Q21 as scalars, and calculate

a=N2*o2*Q21;

so a is a scalar. But you try to

              Pfemto(i)=P0+(N1*o1)+sum(a(1:N2))+(sum(c(1:N3))*D);

which tries to subscript a . Same problem with c .

I wonder if you should be extracting a, b, c, d from coordVectors ?

Answer 2

[brahmi ibtissem]

My code replace this formula:

P_t=P_ini+[((N_1*o_1 )+(∑_(i=1)^(N_2)▒〖o_2*Q_j 〗)+(∑_(i=1)^(N_3)▒〖o_3*Q_j 〗) )*D_p ]

where

        Q_j={█(Q_21  if the  application of Up2 is RT@〖  Q〗_22  if the  application of the Up2 is NRT)}  
  Q_j={█(Q_31  if the  application of Up3 is RT@〖  Q〗_32  if the  application of the Up3 is NRT)}

[Walter Roberson]

Unfortunately some of those characters do not show up at all well.

[brahmi ibtissem]

My code replace this formula:

Pt=Pini+ [[(NUp1*o1)]+[( ∑o2*Qj)+( ∑o3 *Qj)]*Dp]

where

        Qj={█(Q21  if the  application of Up2 is Real Time application
              Q22  if the  application of the Up2 is Not Real Time application)}  
  Qj={(Q31  if the  application of Up3 is RT@
            Q32  if the  application of Up3 is Not Real Time application

[brahmi ibtissem]

My code replace this formula:

Pt=Pini+ [[(N1*o1)]+[( ∑o2*Qj)+( ∑o3 *Qj)]*Dp]

where Qj={█(Q21 if the application of Up2 is Real Time application Q22 if the application of the Up2 is Not Real Time application)} Qj={(Q31 if the application of Up3 is RT@ Q32 if the application of Up3 is Not Real Time application