If I have a plotted curve with a small gap in the midlle, how can I fill the gap with a straight line?

If I have a plotted curve with a small gap in the midlle, how can I fill the gap with a straight line?

Answer 1

[Star Strider]

I have no idea what your curve is or the reason the gap exists, so this is a guess. The approach to both is to find the ends of the first part of the curve, and connect them to the beginning of the second part.

If you know where the gap is, try this:

x1 = linspace(0, 1);
y1 = sin(x1*3*pi);
x2 = x1 + 2;
y2 = cos(x2*4*pi);

figure
subplot(2,1,1)
plot(x1, y1, 'g')
hold on
plot(x2, y2, 'g')
hold off

subplot(2,1,2)
plot(x1, y1, 'g')
hold on
plot(x2, y2, 'g')
plot([x1(end) x2(1)], [y1(end) y2(1)], '-r')                            % Connect Ends With Red Line
hold off

If your data have a region of one or more consecutive NaN values, try this:

x3 = linspace(0, 5);
x3(40:60) = NaN;
y3 = exp(-(x3-2.5).^2);

nanv = find(isnan(y3));                                                 % Find Region With ‘NaN’ Values

figure
plot(x3, y3, 'g')
hold on
plot(x3([nanv(1)-1, nanv(end)+1]), y3([nanv(1)-1, nanv(end)+1]), 'r')   % Connect Ends With Red Line
hold off