Is no graph???

I am new to matlab and I have some question.Why graph not come out.when I run this code

x = [1 : 0.005 : 4*pi] 
y =sin(x)/cos(x); 
plot(x,y);

But is work when I change y=sin(x)/cos(x) to y=tan(x) thank you for your answers

[Stephen23]

Have a look at the size of y:

>> numel(x)
ans =  2314
>> numel(y)
ans =  1

You need to use element-wise rdivide:

sin(x) ./ cos(x)
       ^ you need this!

Read more about the differences here:

https://www.mathworks.com/help/matlab/matlab_prog/array-vs-matrix-operations.html

Answer 1

[Yuvaraj Venkataswamy]

Please use this.

 x = 1 : 4*pi
 y=sin(x)./cos(x); 
 plot(x,y);

[Khongsin Tinrach]

ok now I can do it.thank you

Answer 2

[KSSV]

It is very much working:

x = 1:0.005:4*pi ;
 y =sin(x)./cos(x);
%   y=tan(x) ;
plot(x,y);

[Khongsin Tinrach]

Is working.thank you very much.