How to count the total interruption?

figure(1)
plot(a,b,'r*','Markersize',1);
xlabel('Epoch')
ylabel('PRN')
title('Satellite Visibility from Javed Receiver 1');

Hello

I have plot a signal in which i am getting some interruption. Plot is of total number of visible satellite on y-axis and total number of epoch on x-axis. So I am getting graph as attached.

[Adam Danz]

My guess is that you've got NaN values. You can count the number of NaN values:

sum(isnan(x))

[vimal kumar chawda]

figure(1)
plot(a,b,'r*','Markersize',1);
xlabel('Epoch')
ylabel('PRN')
title('Satellite Visibility from Javed Receiver 1');

In the above case , How can I count it. As you can see the plot and the data in a and b array.

[Adam Danz]

The variables you're plotting are 'a' and 'b'. Check for NaN values in both using isnan().

[vimal kumar chawda]

There is no gap or NaN in the data so it is difficult plot it.

How can I do it and please find the attachement of a and b ? I think you are giving my right direction and I am not able to fidure it out.

Answer 1

[KSSV]

There are no NaN's in the data. To get the breaks/ interruption you can get the successuve distances and find the ditances which are greater then the resolution.

a, b are your point arrays.

da = diff(a) ; 
db = diff(b) ;
d = sqrt(da.^2+db.^2) ; 
iwant = nnz(d>1) ;  % I assume if the points are continuous the distance should be 1.