Note: This page has been translated by MathWorks. Please click here

To view all translated materals including this page, select Japan from the country navigator on the bottom of this page.

To view all translated materals including this page, select Japan from the country navigator on the bottom of this page.

Andrews plot

`andrewsplot(X)`

andrewsplot(X,...,'Standardize',* standopt*)

andrewsplot(X,...,'Quantile',alpha)

andrewsplot(X,...,'Group',group)

andrewsplot(X,...,

`'PropName'`

`PropVal`

h = andrewsplot(X,...)

`andrewsplot(X)`

creates an Andrews plot
of the multivariate data in the matrix `X`

. The rows
of `X`

correspond to observations, the columns to
variables. Andrews plots represent each observation by a function *f*(*t*)
of a continuous dummy variable *t* over the interval
[0,1]. *f*(*t*) is defined for the *i* th
observation in `X`

as

$$f(t)=X(i,1)/\sqrt{2}+X(i,2)\mathrm{sin}(2\pi t)+X(i,3)\mathrm{cos}(2\pi t)+\dots $$

`andrewsplot`

treats `NaN`

values
in `X`

as missing values and ignores the corresponding
rows.

`andrewsplot(X,...,'Standardize',`

creates
an Andrews plot where * standopt*)

`standopt`

`'on'`

— scales each column of`X`

to have mean`0`

and standard deviation`1`

before making the plot.`'PCA'`

— creates an Andrews plot from the principal component scores of`X`

, in order of decreasing eigenvalue. (See`pca`

.)`'PCAStd'`

— creates an Andrews plot using the standardized principal component scores. (See`pca`

.)

`andrewsplot(X,...,'Quantile',alpha)`

plots
only the median and the `alpha`

and (1 – `alpha`

)
quantiles of *f*(*t*) at each value
of *t*. This is useful if `X`

contains
many observations.

`andrewsplot(X,...,'Group',group)`

plots
the data in different groups with different colors. Groups are defined
by `group`

, a numeric array containing a group index
for each observation. `group`

can also be a categorical
array, character matrix, or cell array of character vectors containing
a group name for each observation.

`andrewsplot(X,...,`

sets
optional lineseries object properties to the specified values for
all lineseries objects created by * 'PropName'*,

`PropVal`

`andrewsplot`

.
(See Line Properties.)`h = andrewsplot(X,...)`

returns a column
vector of handles to the lineseries objects created by `andrewsplot`

,
one handle per row of `X`

. If you use the `'Quantile'`

input
parameter, `h`

contains one handle for each of the
three lineseries objects created. If you use both the `'Quantile'`

and
the `'Group'`

input parameters, `h`

contains
three handles for each group.

Was this topic helpful?