XWidthAtYVal

X-axis width spanned by points where Y reaches a target.

Syntax

M = XWidthAtYVal(X, Y, v)

Description

Given paired samples X and Y, returns the X-axis distance between the first and last points where Y equals the target value v. Common for measuring pulse width, full-width-half-maximum (FWHM) of a peak, etc.

MathJet-specific (not in MATLAB).

Examples

x = linspace(-5, 5, 100);
y = exp(-x.^2);            % Gaussian centered at 0
XWidthAtYVal(x, y, 0.5)   % ≈ 1.665  (FWHM = 2*sqrt(ln 2))

See also

• XAtYVal — X value where Y equals a target (interpolated).
• YAtXVal — Y value where X equals a target (interpolated).

Also categorized under: Range Functions / Math.