timeFromYear1

<p>There are 62,135,596,800 seconds from 0001-01-01 until 1970-01-01.
The last 1e7 digits of x are unnecessary microseconds.</p>

internal

It provides a function "wearingMarking" for classification of monitor
wear and nonwear time intervals in accelerometer data collected to assess
physical activity. The package also contains functions for making plot for
accelerometer data and obtaining the summary of various information including
daily monitor wear time and the mean monitor wear time during valid days.
"deliveryPred" and "markDelivery" can classify days for ActiGraph delivery by mail;
"deliveryPreprocess" can process accelerometry data for analysis by zeropadding incomplete
days and removing low activity days; "markPAI" can categorize physical activity
intensity level based on user-defined cut-points of accelerometer counts. It also
supports importing ActiGraph AGD files with "readActigraph" and "queryActigraph" functions.

Leena Choi

PhysicalActivity

Process Accelerometer Data for Physical Activity Measurement

Cole Beck

Zhouwen Liu

Ryan Moore

Charles E. Matthews

Maciej S. Buchowski

timeFromYear1 function

Create Time From Seconds Since 0001-01-01 — timeFromYear1

Create Time From Seconds Since 0001-01-01

timeFromYear1: Create Time From Seconds Since 0001-01-01

Description

Usage

Arguments