Plot discrete sequence data

`stem(`

plots the
data sequence, `Y`

)`Y`

, as stems that extend from a baseline
along the *x*-axis. The data values are indicated
by circles terminating each stem.

If

`Y`

is a vector, then the*x*-axis scale ranges from 1 to`length(Y)`

.If

`Y`

is a matrix, then`stem`

plots all elements in a row against the same*x*value, and the*x*-axis scale ranges from 1 to the number of rows in`Y`

.

`stem(`

plots
the data sequence, `X`

,`Y`

)`Y`

, at values specified by `X`

.
The `X`

and `Y`

inputs must be vectors
or matrices of the same size. Additionally, `X`

can
be a row or column vector and `Y`

must be a matrix
with `length(X)`

rows.

If

`X`

and`Y`

are both vectors, then`stem`

plots entries in`Y`

against corresponding entries in`X`

.If

`X`

is a vector and`Y`

is a matrix, then`stem`

plots each column of`Y`

against the set of values specified by`X`

, such that all elements in a row of`Y`

are plotted against the same value.If

`X`

and`Y`

are both matrices, then`stem`

plots columns of`Y`

against corresponding columns of`X`

.

`stem(___,`

fills
the circles. Use this option with any of the input argument combinations
in the previous syntaxes.`'filled'`

)

`stem(___,`

modifies
the stem chart using one or more `Name,Value`

)`Name,Value`

pair
arguments.