>>x = linspace(0,10);
>> y1 = sin(x);
>> y2 = sin(2*x);
>> y3 = sin(4*x);
>> y4 = sin(8*x);
>> figure
>> subplot(2,2,1);
>> plot(x,y1);
>> title('Subplot 1: sin(x)')
>> xlabel('x'),ylabel('y1')
>> subplot(2,2,2);
>> plot(x,y2);
>> title('Subplot 2: sin(2x)')
>> xlabel('x'),ylabel('y2')
>> subplot(2,2,3)
>> plot(x,y3);
>> title('Subplot 3: sin(4x)')
>> xlabel('x'),ylabel('y3')
>> subplot(2,2,4)
>> plot(x,y4);
>> title('Subplot 4: sin(8x)')
>> xlabel('x'),ylabel('y4')