plotting the points near to origin

Question

sampath kumar punna 2019-10-29

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评论： sampath kumar punna 2019-10-29

here is my x and y values, if i plot my graph i get it as shown below but i dont my graph with all points of my data

i wanted my graph like this as shown below, only the highlited part which is near to the zero, i want some points like 10-15 values which are near to the point zero from my data, and can i get values the points.

please can you help me to do this, which will be very help full for my execution

thanks

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Answer 1

Rik 2019-10-29

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Your data doesn't seem to fit your plots. The code below should give you an idea of how you could do this. You could also define a cutoff distance and show everything below that distance.

X=XY(:,1);Y=XY(:,2);%XY is the array as you posted in your question
dist_to_origin=sqrt(X.^2+Y.^2);
[~,order]=sort(dist_to_origin);
plot(X(order(1:10)),Y(order(1:10)),'o')
axis([0 80 0 80])
%instead of order(1:10) you can also use this:
L=dist_to_origin<=45;
plot(X(L),Y(L),'o')