errorbar(x, y, z, zerr=None, yerr=None, xerr=None, fmt='', barsabove=False, errorevery=1, ecolor=None, elinewidth=None, capsize=None, capthick=None, xlolims=False, xuplims=False, ylolims=False, yuplims=False, zlolims=False, zuplims=False, *, data=None, **kwargs)[source]
 
Plot lines and/or markers with errorbars around them. x/y/z define the data locations, and xerr/yerr/zerr define the errorbar sizes. By default, this draws the data markers/lines as well the errorbars. Use fmt='none' to draw errorbars only.  Parameters 
 
x, y, zfloat or array-like


The data positions.  
xerr, yerr, zerrfloat or array-like, shape (N,) or (2, N), optional


The errorbar sizes:  scalar: Symmetric +/- values for all data points. shape(N,): Symmetric +/-values for each data point. shape(2, N): Separate - and + values for each bar. First row contains the lower errors, the second row contains the upper errors. 
None: No errorbar.  Note that all error arrays should have positive values.  
fmtstr, default: ''


The format for the data points / data lines. See plot for details. Use 'none' (case insensitive) to plot errorbars without any data markers.  
ecolorcolor, default: None


The color of the errorbar lines. If None, use the color of the line connecting the markers.  
elinewidthfloat, default: None


The linewidth of the errorbar lines. If None, the linewidth of the current style is used.  
capsizefloat, default: rcParams["errorbar.capsize"] (default: 0.0)


The length of the error bar caps in points.  
capthickfloat, default: None


An alias to the keyword argument markeredgewidth (a.k.a. mew). This setting is a more sensible name for the property that controls the thickness of the error bar cap in points. For backwards compatibility, if mew or markeredgewidth are given, then they will over-ride capthick. This may change in future releases.  
barsabovebool, default: False


If True, will plot the errorbars above the plot symbols. Default is below.  
xlolims, ylolims, zlolimsbool, default: False


These arguments can be used to indicate that a value gives only lower limits. In that case a caret symbol is used to indicate this. lims-arguments may be scalars, or array-likes of the same length as the errors. To use limits with inverted axes, set_xlim or set_ylim must be called before errorbar(). Note the tricky parameter names: setting e.g. ylolims to True means that the y-value is a lower limit of the True value, so, only an upward-pointing arrow will be drawn!  
xuplims, yuplims, zuplimsbool, default: False


Same as above, but for controlling the upper limits.  
erroreveryint or (int, int), default: 1


draws error bars on a subset of the data. errorevery =N draws error bars on the points (x[::N], y[::N], z[::N]). errorevery =(start, N) draws error bars on the points (x[start::N], y[start::N], z[start::N]). e.g. errorevery=(6, 3) adds error bars to the data at (x[6], x[9], x[12], x[15], ...). Used to avoid overlapping error bars when two series share x-axis values.    Returns 
 
errlineslist


List of Line3DCollection instances each containing an errorbar line.  
caplineslist


List of Line3D instances each containing a capline object.  
limmarkslist


List of Line3D instances each containing a marker with an upper or lower limit.    Other Parameters 
 
dataindexable object, optional


If given, the following parameters also accept a string s, which is interpreted as data[s] (unless this raises an exception): x, y, z, xerr, yerr, zerr  **kwargs

All other keyword arguments for styling errorbar lines are passed Line3DCollection.     Examples (Source code, png, pdf)