“时间格式的处理”的版本间差异
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（以“* 读入 year =0 & month = 0 & day = 0 ;初始化定义 Date='2012-02-21' reads,Date,year,month,day,format='(I4,1x,I2,1x,I2)' * 转换成儒略日 TIMEGEN,JULD...”为内容创建页面） |
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*[[儒略日]]计算 |
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* 读入 |
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Jul=Julday(month,day,year，hour,minute,second) |
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year =0 & month = 0 & day = 0 ;初始化定义 |
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Date='2012-02-21' |
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reads,Date,year,month,day,format='(I4,1x,I2,1x,I2)' |
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* |
*由儒略日计算date |
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CALDAT, Jul, Month [, Day [, Year [, Hour [, Minute [, Second]]]]] |
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TIMEGEN,JULDAY |
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*生成儒略日时间 |
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MyTimes = TIMEGEN(365, UNITS="Days") + SYSTIME(/JULIAN) |
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MyTimes = TIMEGEN(12, UNITS="Months", START=JULDAY(1,1,2000)) |
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* 画图，时间坐标 |
* 画图，时间坐标 |
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例子 '%D/%N/%Y' yields 11/12/1993 |
例子 '%D/%N/%Y' yields 11/12/1993 |
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'%M!C%Y' yields DEC on the top line, 1993 on the bottom (!C is the new line graphic command). |
'%M!C%Y' yields DEC on the top line, 1993 on the bottom (!C is the new line graphic command). |
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[[astro_lib]]中的儒略日相关程序 |
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2015年1月13日 (二) 12:18的最新版本
- 儒略日计算
Jul=Julday(month,day,year，hour,minute,second)
- 由儒略日计算date
CALDAT, Jul, Month [, Day [, Year [, Hour [, Minute [, Second]]]]]
- 生成儒略日时间
MyTimes = TIMEGEN(365, UNITS="Days") + SYSTIME(/JULIAN) MyTimes = TIMEGEN(12, UNITS="Months", START=JULDAY(1,1,2000))
- 画图，时间坐标
label_date
例： dummy = LABEL_DATE(DATE_FORMAT='%M%Z') mytimes=timegen(12,unit='months,start=julday(1,1,2012)) y=findgen(12) plot,mytimes,y,xtickformat='label_date'
DATE_FORMAT 格式 %M for month %N for month (2 digit abbr) %D for day of month, %Y for 4 digit year. %Z for last two digits of year. %W for day of week
For time: %A for AM or PM %H for Hours, 2 digits. %I for minutes, 2 digits. %S for Seconds, 2 digits. %0--%9 following %S, indicates digits after decimal point. %% is % 例子 '%D/%N/%Y' yields 11/12/1993 '%M!C%Y' yields DEC on the top line, 1993 on the bottom (!C is the new line graphic command).
astro_lib中的儒略日相关程序