To concatenate rows in matrix within for loop based on if else statement

Hello everyone,

m = 2;
PU = 4;
NumBits=1000;
lamda_val=0.5;
si=rand(m,NumBits);
hi=rand(m,NumBits);
ni=rand(m,NumBits);

PU = input('Enter No. of primary user = ');
Fc = zeros(1, PU);
if PU >=1
    for x = 1:PU
        Fc(x) = input('Enter 1 for signal present and 0 for noise in channel = ');  
    end
else
    disp('No primary signal detected');
    return;
end

table = zeros(m,PU*NumBits); 
for index = 1:(PU)
    if Fc(index) == 1
        for ii=1:m
            temp(ii,:)=abs((hi(ii,:).*si(ii,:))+ni(ii,:)).^2;
        end
    else
        for ii=1:m
            temp_noise(ii,:)=abs(ni(ii,:)).^2;
        end
    end
    table = [temp(ii,:)  temp_noise(ii,:)]
end

can somebody tell me how to do this. I have to store values in rows.

I have edited the code for better understanding. Hope it helps.

If PU is 4 with values 1011, then values generated due to these values should be stored in concatenation to evaluate further.

Regards

Om Prakash

[KALYAN ACHARJYA]

Sorry, I can't get the question. Can you elaborate with simple example? Thanks

[Fabio Freschi]

your example is not working because Fc is not defined

[om prakash]

hi kalyan

I have edited my question, any suggestion?

Answer 1

[Jos (10584)]

This code is weird.

In each iteration of "index" you fill either a matrix temp or a matrix temp_noise with m rows of values.

Then you concatenate only the last (= ii-th) row of both of these matrices into a single row, and store this in the variable table. One the of these last rows was just created, and for the other one you use the one created one or more iterations ago.

At every subsequention iteration, this variable table is overwritten.

So, first you need to carefully think about what you are trying to do ....

[Fabio Freschi]

I agree, I was trying to reverse engineer the problem from the code, but a clear example would help

[om prakash]

Hi jos,

I have edited my question, any suggestion?

Answer 2

[om prakash]

m = 2;

PU = 4;

NumBits=1000;

lamda_val=0.5;

si=rand(m,NumBits);

hi=rand(m,NumBits);

ni=rand(m,NumBits);

PU = input('Enter No. of primary user = ');

Fc = zeros(1, PU);

if PU >=1

for x = 1:PU

Fc(x) = input('Enter 1 for signal present and 0 for noise in channel = ');

end

else

disp('No primary signal detected');

return;

end

table = zeros(m,PU*NumBits);

for index = 1:(PU)

if Fc(index) == 1

for ii=1:m

temp(ii,:)=abs((hi(ii,:).*si(ii,:))+ni(ii,:)).^2;

A(ii,:) = temp(ii,:);

end

else

for ii=1:m

temp_noise(ii,:)=abs(ni(ii,:)).^2;

A(ii,:) = temp_noise(ii,:);

end

end

table(index*ii,:) = A(ii,:);

%then it need to be transposed

end

I tried this, but table matrix is not storing the correct values. Apart from that it need to be transposed to convert matrix [2,4000]

can anyone tell me how this can be done.