how can i debug below error in matlab

[krishnagupta023]

i am trying to run matlab code which is as below

%------------modulation for n=1 at antenna 0------------------
if (real(sn)>= 0 )
tet11=0;
else (real(sn)<= 0 );
tet11=1;
end

but while running it's showing error saying
" <= produces a value that might be unused "

can anyone help me to debug this error please...

 

[usef_vahabzadeh]

I copied your MATLAB code and tried to run it and MATLAB says that 'sn' is undefined, please upload code completely.

 

[bar_shay]

You have missing if after the else word

 

[emresel]

By the way;
You don't exculude if equals to 0 case, i mean what you want to be happen in that case.
You use both if "<=0" and ">=0", if it is equals 0, which one should be happen? Currently first if statement will be action and the other one discarded.
Take care that point.

 

[noori.re]

as emresel said you should correct your digit after <= and >= . anyway it is better to use < and > instead <= and >=. for example use x<1 instead use x<=0.

 

[kaushik1411]

For this case of yours, the syntax is not correct as you can not use a condition after 'else' statement. So either use 'else' alone (which really would solve your ambiguous real(sn)==0 case ) or use 'elseif' statement with appropriate correction to the condition overlap.