errbar
add vertical error bars on a 2D plot
Syntax
errbar(x, y, em, ep)
Arguments
- x, y, em, ep
four matrices of the same size.
Description
errbar adds vertical error bars on a 2D plot.
x and y have the same meaning
as in plot2d.
em(i,j) and ep(i,j) stands for
the error interval on the value y(i,j):
[y(i,j)-em(i,j),y(i,j)+ep(i,j)].
Enter the command errbar() to see a demo.
Examples
// low resolution sinus x1 = linspace(0, 2*%pi, 10); y1 = sin(x1); plot(x1, y1, 'b'); // high resolution sinus x2 = linspace(0, 2*%pi, 100); y2 = sin(x2); plot(x2, y2, 'g'); // display the error between a linear interpolation and x2 x_err = x1(2:$-1); y_err = y1(2:$-1); err = y2 - linear_interpn(x2, x1, y1, "periodic"); err_m = zeros(y_err); err_p = zeros(y_err); for i = 2:size(x1,'c')-1 err_m(i-1) = sum(abs(err(x1(i-1) <= x2 & x2 < x1(i) ))); err_p(i-1) = sum(abs(err(x1(i) <= x2 & x2 < x1(i+1)))); end errbar(x_err, y_err, err_m, err_p);
See also
- plot2d — 2D plot
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