fcontour and fplot showing distorted images...

I can still use ezplot and ezcontour just fine. But fplot and fcontour has distorted images that makes the plot unreadable. Here is a comparison from a code I wrote.

1)fplot

(for some reason I couldn't convert this jpg so I took a screenshot)

2)ezplot

3)fcontour

4)ezcontour

In case you are curious here is the code

clear all

clc

syms k a b x

e=exp(sym(1));

assume (a>0);

%a=6;

z(k,a)=(((e^(2*i*k*a))-1)/(2*i*k*((pi*a)^(1/2))*(e^(i*k*a))))

%fplot(z);

%ezplot(z);

ezcontour (z);

%fcontour(z);

Answer 1

[Star Strider]

Separate the real and imag parts of the function and it works —

syms k a b x
e=exp(sym(1));
assume (a>0);
%a=6;
z(k,a)=(((e^(2*i*k*a))-1)/(2*i*k*((pi*a)^(1/2))*(e^(i*k*a))))

z(k, a) = 

figure
%fplot(z);
%ezplot(z);
% ezcontour (z);
fcr = fcontour(real(z),'-r');
% get(fcr)
hold on
fci = fcontour(imag(z), '-b');
hold off
grid on

% legend('\Re{z}','\Im{z}', 'Location','bestoutside')

.

[Ozgur Toprak Sahin]

Thank you for helping me out : )

[Star Strider]

As always, my pleasure!

.