# errorbar

## Purpose

Errorbar plot.

## Synopsis

    errorbar(x,y,e)

## Description

`errorbar(x,y,e)` plots the graph of vector `x` versus vector `y` with errorbars specified by vector `e`. Vectors `x`, `y`, and `e` must be the same length. The error bars are each drawn a distance of `e(i)` above and below the points in `(x,y)` so that each bar is `2*e(i)` long.

If `x`, `y`, and `e` are matrices of the same size, one errorbar graph per column is drawn.

## Examples

This example shows how error bars can be added to an existing plot.

    x = 0: 0.1: 2;
    y = erf(x);
    e = rand(size(x))/10;
    errorbar(x,y,e)

## ``See Also

    bar, plot, std

(c) Copyright 1994 by The MathWorks, Inc.