nushell/docs/commands/each-window.md
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# each window
Runs a block on sliding windows of `window_size` rows of a table at a time.
## Usage
```shell
> each window <window_size> <block> {flags}
```
## Parameters
* `<window_size>` the size of each window
* `<block>` the block to run on each group
## Flags
* -h, --help: Display this help message
* -s, --stride <integer>: the number of rows to slide over between windows
## Examples
Echo the sum of each window
```shell
> echo [1 2 3 4] | each window 2 { echo $it | math sum }
```