数据预处理

金融市场的日期和货币数据

在运行分析之前，数据的表示形式和质量至关重要。通常需要将金融数据的格式转换为标准格式。此工具箱提供了一组工具来整理和转换金融数据以进行分析。

函数

`now`	当前日期和时间作为日期序列值
`today`	当前日期
`datefind`	Indices of dates in matrix
`datevec`	将日期和时间转换为分量向量
`datetime`	表示时间点的数组
`day`	Day of month
`eomdate`	Last date of month
`hour`	Hour of date or time
`lweekdate`	Date of last occurrence of weekday in month
`second`	Seconds of date or time
`minute`	Minute of date or time
`month`	Month of date
`months`	Number of whole months between dates
`nweekdate`	Date of specific occurrence of weekday in month
`weeknum`	Week in year
`year`	Year of date
`yeardays`	Number of days in year

`date2time`	Time and frequency from dates
`datedisp`	Display date entries
`datenum`	将日期和时间转换为日期序列值
`datestr`	将日期和时间转换为字符串格式
`m2xdate`	MATLAB date to Excel serial date number
`time2date`	Dates from time and frequency
`uicalendar`	Graphical calendar
`x2mdate`	Excel 日期序列值转 MATLAB 日期序列值或日期时间格式

`busdate`	Next or previous business day
`busdays`	Business days for given period
`datemnth`	Date of day in future or past month
`datewrkdy`	Date of future or past workday
`days252bus`	Number of business days between dates
`days360`	Days between dates based on 360-day year
`days360e`	Days between dates based on 360-day year (European)
`days360isda`	Days between dates based on 360-day year (International Swap Dealer Association (ISDA) compliant)
`days360psa`	Days between dates based on 360-day year (Public Securities Association (PSA) compliant)
`days365`	Days between dates based on 365-day year
`daysact`	日期之间的实际天数
`daysadd`	Date away from starting date for any day-count basis
`daysdif`	Days between dates for any for any day-count basis
`fbusdate`	First business date of month
`isbusday`	True for dates that are business days
`lbusdate`	Last business date of month
`quarter`	Returns the quarter of given date
`thirdwednesday`	Find third Wednesday of month
`wrkdydif`	Number of working days between dates
`yearfrac`	计算日期之间的天数占全年的比例

`createholidays`	Create trading calendars
`holidays`	Holidays and nontrading days
`nyseclosures`	New York Stock Exchange closures from 1885 to 2070
`addBusinessCalendar`	Add business calendar awareness to timetables

`accrfrac`	Fraction of coupon period before settlement
`cpncount`	Coupon payments remaining until maturity
`cpndaten`	Next coupon date for fixed-income security
`cpndatenq`	Next quasi-coupon date for fixed-income security
`cpndatepq`	Previous quasi-coupon date for fixed-income security
`cpndatep`	Previous coupon date for fixed-income security
`cpndaysn`	Number of days to next coupon date
`cpndaysp`	Number of days since previous coupon date
`cpnpersz`	Number of days in coupon period

`cur2frac`	Decimal currency values to fractional values
`cur2str`	Bank-formatted text
`dec2thirtytwo`	Decimal to thirty-second quotation
`frac2cur`	Fractional currency value to decimal value
`thirtytwo2dec`	Thirty-second quotation to decimal