MATLAB: I want to produce square wave without using square function, but this code it showing error, “illegal use of IF keyword”. How to rectify it

if statementsquare wave

t=-10:0.1:10;
a=1;
for i=1:2:201
  {
      if a==1
    {    
         z(1,i)=0;
         z(1,i+1)=0;
     }   
    else 
      {  
         z(1,i)=1;
         z(1,i+1)=1;
       } 
      end
    a=a*(-1); 
   }  
end
plot(t,z)

Best Answer

In MATLAB, {} is used only for building cell arrays, or extraction of data from collection objects, such as cell arrays or tables or string scalars. You should remove all of those { and } that you have.
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