MATLAB: How to Plot a primitive function

Question

I'd like to use ezplot to draw a function. This is my code:

ray=0.11;
m=3.5;
C=2*10^(-12);
DS=140;
CONST=1/((DS^m)*C*pi^(m/2));
syms x
F= @(x) CONST*((x.^(-m/2))./((1.6906*(x/ray).^5-4.6813*(x/ray).^4+5.4253*(x/ray).^3-2.8213*(x/ray).^2+0.8716*(x/ray)+0.4251).^m));
syms x
z=int(F,x,0,0.04);
syms x
ezplot(z,[0,0.04])

I always find an error while I want to plot this function… Why? This is the error :

Error using inlineeval (line 14)
Error in inline expression ==> int(2000./(x.^(7./4).*((2179.*x)./275 - (28213.*x.^2)./121 + (5425300.*x.^3)./1331 - (468130000.*x.^4)./14641 +
(16906000000.*x.^5)./161051 + 4251./10000).^(7./2)), x, 0, 1./25)
 Undefined function 'int' for input arguments of type 'double'.
Error in inline/feval (line 33)
        INLINE_OUT_ = inlineeval(INLINE_INPUTS_, INLINE_OBJ_.inputExpr, INLINE_OBJ_.expr);
Error in ezplotfeval (line 51)
    z = feval(f,x(1));
Error in ezplot>ezplot1 (line 468)
    [y, f, loopflag] = ezplotfeval(f, x);
Error in ezplot (line 144)
                [hp, cax] = ezplot1(cax, f{1}, vars, labels, args{:});
Error in sym/ezplot (line 76)
      h = ezplot(fhandle(f),varargin{:});

Answer 1

xvals = linspace(0, 0.04, 1000);
y = F(xvals);
z = cumtrapz(y);
plot(xvals, z);