Why do I keep getting a subplot error?

I keep getting this error for my script:

'Error in subplot (line 7) subplot(2,2,1)'.

Can anybody help me pls?

clear;
clc;
t = linspace(0,4*pi);
x = 2*sin(t);
y = 2*sin(t);

subplot(2,2,1)
plot(t , x , 'color' , 'm');
hold on
plot(t , y , 'color' , 'c');

subplot(2,2,2)
plot(t , x+y , 'color' , 'y');

subplot(2,2,3)
plot(t , x-y , 'color' , 'g');

subplot(2,2,4)
plot(t , x , 'color' , 'm');
hold on
plot(t , -y , 'color' , 'c');

[madhan ravi]

paste the complete error message that you get

[Reyhane Farshbaf Shakib]

this is the whole error message:

Attempt to execute SCRIPT subplot as a function:

D:\University\ترم 6\آز مدار\تصاویر لیساژو\subplot.m

Error in subplot (line 7)

subplot(2,2,1)

Answer 1

[madhan ravi]

You have a filenamed subplot.m which shadows the function named subplot() please remove it from the path or delete it.