polar plot to many circles

hello,

having some problems with polarplot.

data = importdata('test.txt');
x_cart=data(:,1);
y_cart=data(:,2);
[theta,rho] = cart2pol(x_cart,y_cart);
theta_deg=rad2deg(theta)
polar(theta_deg,rho);

my dataset is an 3600x2 matrix with cartesian x and y-values coming from a roudness-measurement. so the distance between to measured points is 0,1° in the plot more circles are shown, not only once (what it should)... whats the mistake? i apprehend something with the cart2pol is wrong...

i also add the dataset and a screenshot.

thanks for your help!

[Henry Giddens]

Unless I am missing something, 'polar' and 'polarplot' require the input angle in radians rather than degrees...

http://uk.mathworks.com/help/matlab/ref/polarplot.html

[cheechoo]

so:

data = importdata('testdatensatz.txt');
x_cart=data(:,1);
y_cart=data(:,2);  
[theta,rho] = cart2pol(x_cart,y_cart);
theta_rad=deg2rad(theta)
polar(theta_rad,rho);

that gives me following curves?!

<<

>>

[Henry Giddens]

Try:

data = importdata('testdatensatz.txt');
x_cart=data(:,1);
y_cart=data(:,2);  
[theta,rho] = cart2pol(x_cart,y_cart);
polar(theta,rho);

[cheechoo]

works great, thanks a lot. had some mathemetical problems with transformation