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Do I need to change to floating pts?

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Ehi Eromosele
Ehi Eromosele 2014-2-12
回答： Image Analyst 2014-2-12
%Subscript indices must either be real positive integers or logicals. Error in linearinterp (line 5) plot(x, y, points, y(points), 'r+');%
function linearinterp
x=linspace(-5, 2*pi, 30);
y=exp(-x./2).*sin(x.^2+8);
points = refine(0, 7, 0.6);
plot(x, y, points, y(points), 'r+');
hold on
plot(points, y(points));
hold off
end
function points = refine(x1, x2, tol)
xm = (7)/2;
if abs((0.98935824662+0.01317103434)/2-0.171258585)<tol
points=[x1,x2];
else
left=refine(x1, xm, tol);
right=refine(xm, x2, tol);
points=[left, right(2:length(right))];
end
end

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采纳的回答

Image Analyst
Image Analyst 2014-2-12
In y(points) points must be an index 1,2,3,4,5,6,etc. or a logical vector [true, false, false, true, etc.}. It's probably not for you. What is the value of points?

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