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Box plot

`boxplot(x)`

`boxplot(x,g)`

`boxplot(ax,___)`

`boxplot(___,Name,Value)`

`boxplot(`

creates
a box plot of the data in `x`

)`x`

. If `x`

is
a vector, `boxplot`

plots one box. If `x`

is
a matrix, `boxplot`

plots one box for each column
of `x`

.

`boxplot(`

creates
a box plot using the axes specified by the axes graphic object `ax`

,___)`ax`

,
using any of the previous syntaxes.

`boxplot(___,`

creates
a box plot with additional options specified by one or more `Name,Value`

)`Name,Value`

pair
arguments. For example, you can specify the box style or order.

`boxplot`

creates a visual representation of the data, but does not return numeric values. To calculate the relevant summary statistics for the sample data, use the following functions:You can see data values and group names using the data cursor (MATLAB) in the figure window. The cursor shows the original values of any points affected by the

`datalim`

parameter. You can label the group to which an outlier belongs using the`gname`

function.To modify graphics properties of a box plot component, use

`findobj`

with the`Tag`

property to find the component's handle.`Tag`

values for box plot components depend on parameter settings, and are listed in the following table.Parameter Settings Tag Values All settings `'Box'`

`'Outliers'`

When `'PlotStyle'`

is`'traditional'`

`'Median'`

`'Upper Whisker'`

`'Lower Whisker'`

`'Upper Adjacent Value'`

`'Lower Adjacent Value'`

When `'PlotStyle'`

is`'compact'`

`'Whisker'`

`'MedianOuter'`

`'MedianInner'`

When `'Notch'`

is`'marker'`

`'NotchLo'`

`'NotchHi'`

[1] McGill, R., J. W. Tukey, and W. A. Larsen.
"Variations of Boxplots." *The American Statistician*.
Vol. 32, No. 1, 1978, pp. 12–16.

[2] Velleman, P.F., and D.C. Hoaglin. *Applications,
Basics, and Computing of Exploratory Data Analysis*. Pacific
Grove, CA: Duxbury Press, 1981.

[3] Nelson, L. S. "Evaluating Overlapping
Confidence Intervals." *Journal of Quality Technology*.
Vol. 21, 1989, pp. 140–141.

[4] Langford, E. "Quartiles in Elementary Statistics", *Journal
of Statistics Education*. Vol. 14, No. 3, 2006.

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