splitapply
Split data into groups and apply function
Syntax
Description
Y = splitapply(
splits func
,X
,G
)X
into groups specified by G
and
applies the function func
to each group.
splitapply
returns Y
as an array that
contains the concatenated outputs from func
for the groups split
out of X
. The input argument G
is a vector of
positive integers that specifies the groups to which corresponding elements of
X
belong. If G
contains
NaN
values, splitapply
omits the
corresponding values in X
when it splits X
into groups. To create G
, you can use the findgroups
function.
splitapply
combines two steps in the Split-Apply-Combine Workflow.
[Y1,...,YM] = splitapply(___)
splits
variables into groups and applies func
to each
group. func
returns multiple output arguments. Y1,...,YM
contains
the concatenated outputs from func
for the groups
split out of the input data variables. func
can
return output arguments that belong to different classes, but the
class of each output must be the same each time func
is
called. You can use this syntax with any of the input arguments of
the previous syntaxes.
The number of output arguments from func
need
not be the same as the number of input arguments specified by X1,...,XN
.
Examples
Input Arguments
More About
Extended Capabilities
Version History
Introduced in R2015b
See Also
findgroups
| rowfun
| varfun
| unique
| arrayfun
| groupsummary
| discretize
| histcounts
| accumarray
| convertvars
| vartype