# std

Standard deviation

`std` is not recommended. Use `timetable` instead. For more information, see Convert Financial Time Series Objects fints to Timetables.

## Syntax

``tsstd = std(tsobj)``
``tsstd = std(tsobj,flag)``

## Description

example

````tsstd = std(tsobj)` computes the standard deviation of each data series in the financial time series object `tsobj` and returns the results in `tsstd`. The `tsstd` output is a structure with field name(s) identical to the data series name(s).```

example

````tsstd = std(tsobj,flag)` normalizes the data as indicated by `flag`.```

## Examples

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1. Create a `fints` object.

`dates_and_times = (now:now+5)'`
```dates_and_times = 1.0e+05 * 7.3840 7.3840 7.3840 7.3841 7.3841 7.3841 ```
` tsobj = fints(dates_and_times, randn(6,1))`
```Warning: FINTS is not recommended. Use TIMETABLE instead. For more information, see Convert Financial Time Series Objects (fints) to Timetables. > In fints (line 169) ```
```tsobj = desc: (none) freq: Unknown (0) {'dates: (6)'} {'times: (6)'} {'series1: (6)'} {'07-Sep-2021'} {'12:30' } {[ 0.5377]} {'08-Sep-2021'} {'12:30' } {[ 1.8339]} {'09-Sep-2021'} {'12:30' } {[ -2.2588]} {'10-Sep-2021'} {'12:30' } {[ 0.8622]} {'11-Sep-2021'} {'12:30' } {[ 0.3188]} {'12-Sep-2021'} {'12:30' } {[ -1.3077]}```
2. Calculate the standard deviation using `std`.

`tsstd = std(tsobj)`
```Warning: FINTS is not recommended. Use TIMETABLE instead. For more information, see Convert Financial Time Series Objects (fints) to Timetables. > In fints/std (line 29) tsstd = struct with fields: series1: 0.8807```

## Input Arguments

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Financial time series object, specified as a `fints` object.

Data Types: `object`

Normalization factor, specified as a logical:

• `1` — Normalizes by n (number of observations)

• `0` — Normalizes by n-1

Data Types: `logical`

## Output Arguments

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Standard deviation of each data series in the financial time series object, returned as a structure.

## Version History

Introduced before R2006a