时间格式的处理
159.226.169.140（讨论）2012年4月7日 (六) 10:43的版本 （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）
- 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,JULDAY
- 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).