Dates and Time

Arrays of date and time values that can be displayed in different formats

日期和时间数据类型约会时间,duration，和calendarDurationsupport efficient computations, comparisons, and formatted display of dates and times. Work with these arrays in the same way that you work with numeric arrays. You can add, subtract, sort, compare, concatenate, and plot date and time values. You also can represent dates and times as numeric arrays or as text. For more information, seeRepresent Dates and Times in MATLABor watch日期和时间阵列.

fonctions

développer tout

创建日期和时间阵列

Points in Time

`约会时间`	代表时间点的数组
`末日`	Shift date or generate sequence of dates and times
`NaT`	不是一次
`eomday`	一个月的最后一天
`lweekdate`	Date of last occurrence of weekday in month
`nweekdate`	Date of specific occurrence of weekday in month

持续时间

`一年s`	多年的持续时间
`天s`	Duration in days
`小时s`	数小时的持续时间
`分钟`	Duration in minutes
`第二s`	Duration in seconds
`milliseconds`	毫秒的持续时间
`duration`	固定长度单位的时间长度

Calendar Durations

`calyears`	Calendar duration in years
`cal`	Calendar duration in quarters
`加尔姆斯`	Calendar duration in months
`卡维克斯`	日历持续时间
`Caldays`	Calendar duration in days
`calendarDuration`	可变长度日历单元中的时间长度

一个月日历

calendar 指定月日历

以替代格式的时间点

`日期num`	Convert date and time to serial date number
`now`	Current date and time as serial date number
`钟`	Current date and time as date vector
`日期`	Current date as character vector
`今天`	(Not recommended; use`DateTime（“今日”）`) Current date
`eomdate`	(Not recommended; use`末日`）一个月的最后日期

Date and Time Components

提取组件

`一年`	Year number of input date and time
`quarter`	Quarter number of input date and time
`month`	输入日期和时间的月号或名称
`星期`	Week number of input date and time
`天`	投入日期和时间的日期或名称
`星期天`	Day of week
`小时`	Hour component of input date and time
`分钟`	Minute component of input date and time
`第二`	Seconds component of input date and time
`星期num`	(Not recommended; use`星期`) Week in year

Split into Components

`ymd`	DateTime的年，月和日数
`hms`	Hour, minute, and second numbers of datetime or duration
`日期vec`	将日期和时间转换为组件的向量
`分裂`	Split calendar duration into numeric and duration units
`time`	Convert time of calendar duration to duration
`timeofday`	Elapsed time since midnight for`约会时间`数组

计算差异或偏移日期

`约会时间`Arrays

`between`	Calendar math differences
`caldiff`	日历数学连续差异
`tzoffset`	UTC的时区偏移
`末日`	Shift date or generate sequence of dates and times

固定格式阵列

`addtodate`	Modify date number by field
`Etime`	Time elapsed between date vectors
`月份`	(Not recommended; use`between`）日期之间的整个月数

查询数组内容

`isbetween`	在日期和时间间隔内确定元素
`是规则`	Determine if input times are regular with respect to time or calendar unit
`isnat`	Determine NaT (Not-a-Time) elements
`ISDST`	Determine daylight saving time elements
`isweekend`	确定周末d elements
`iSdateTime`	确定输入是否为dateTime数组
`isduration`	确定输入是否为持续时间数组
`iscalendarduration`	Determine if input is calendar duration array

转换为文本

`string`	String array
`char`	字符阵列
`Datest`	Convert date and time to string format

Excel,POSIX，和Other Date and Time Systems

转换

`convertTo`	Convert`约会时间`价值s to numeric representations
`exceltime`	ConvertMATLAB约会时间toExcel日期number
`posixtime`	ConvertMATLAB约会时间toPOSIXtime
`朱利安达特`	ConvertMATLAB约会时间to Julian date
`Yyyymmdd`	ConvertMATLAB约会时间to YYYYMMDD numeric value
`m2xdate`	(Not recommended; use`exceltime`)MATLAB日期toExcel序列日期编号
`x2mdate`	(Not recommended; use`约会时间`)Excel序列日期编号MATLAB序列日期编号or`约会时间`价值

Times inMATLAB

`timezones`	List time zones
`跳力`	List all leap seconds supported by`约会时间`数据类型

向后兼容

matlab.datetime.compatibility.convertDateNum 将输入转换为约会时间价值s in a backward-compatible way

rubriques

Represent Dates and Times in MATLAB
利用约会时间存储日期和时间信息的阵列。这些阵列支持算术，排序，比金宝app较，绘图和格式化显示。
Compare Dates and Time
You can perform an element-by-element comparison of values in two约会时间阵列或两个duration使用关系操作员的数组，例如>和<.
- 日期和时间算术
- Plot Dates and Times
Set Date and Time Display Format
The格式property on约会时间,duration，和calendarDuration数组controls the display of values in each array. You can change the value of this property. Changing the格式property does not change the values in the array, only their display.
Specify Time Zones
When you create a datetime, it is unzoned by default. If you work with datetime values from multiple time zones or need to account for daylight saving time, you might need to specify a time zone.
- Convert Date and Time to Julian Date or POSIX Time
跨语言的共享代码和数据
共享与MATLAB处理日期和时间的代码时遵循这些最佳实践^®其他地区的用户。写和阅读其他当地人的日期。
Core Functions Supporting Date and Time Arrays
Many functions in MATLAB operate on date and time arrays in much the same way that they operate on other arrays.