Thread: Matlab loop help

Matlab loop help

Code:

for x = 1:15

  if  x < 5
    y = 2*x - 5;
    
  elseif  5 < x <10
    y = 4*x;
   
  elseif  10< x <15
    y = x*x;
            
  end;

end;

plot(x,y)

Why doesnt this work?

Originally Posted by j-lee00

Matlab loop help

Code:

for x = 1:15
 
  if  x < 5
    y = 2*x - 5;
 
  elseif  5 < x <10
    y = 4*x;
 
  elseif  10< x <15
    y = x*x;
 
  end;
 
end;
 
plot(x,y)

Why doesnt this work?

That depend on what you expect it to do. x and y are scalars when you get to the plot command, what do you want them to be?

RonL

Originally Posted by CaptainBlack

That depend on what you expect it to do. x and y are scalars when you get to the plot command, what do you want them to be?

RonL

One interpretaion of what you are trying to do would be:

Code:

x = 1:15;
y=zeros(1,15);

y=y+(x<=5).*(-y+2*x-5);
y=y+((5<x)&(x<=10)).*(-y+4*x);
y=y+((10<x)&(x<=15)).*(-y+x.*x);
 
plot(x,y)

RonL