How can i set range in contour plot?

I loaded a data and drawed a graph (contour plot) .

In the graph, i could find a diagonal patterns. (image of figure -->)

and next, i want to separate each pattern by using for,if-loop and draw a graph of it.

but i don't know how to set range in contour plot.

could you help me?

load('data.mat')
figure(1)
contour(z)
set(gca,'XTick',[0:250:3700])
set(gca,'YTick',[0:50:600])
xlim([0 3700])
ylim([0 600])

Answer 1

[KSSV]

load('data.mat')
idx = nonzeros(z) ;
figure(1)
contour(z)
z(:,3697:end) = [] ;
N = 168 ;
% set(gca,'XTick',[0:250:3700])
% set(gca,'YTick',[0:50:600])
% xlim([0 3700])
% ylim([0 600])
K = reshape(z,405,N,[]) ;
for i = 1:size(K,3)
    x = (1:N)+(i-1)*N ;
    y = 1:405 ;
    contour(x,y,K(:,:,i)) ;
    drawnow
    hold on
    pause
end

I am reshaping your z matrix into 405x168x22, considering there are 22 strips in the contour plot of z. Each K has partial pattern.

[Norman Breedman]

thanks for your answer. but how should i do to separate each pattern and show them in each figure.