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在JMP 15中需要幫助將日期格式從字符轉換為數字

你好

 

我的Excel工作表的日期格式為：2020年11月18日星期三，下午12:45:00。導入JMP 15後，將其作為字符讀取。

• 您能否分享一種將日期從其字符格式轉換為數字連續格式的方法（例如yyyy-mm-dd hh：mm）？ 我已附上JMP文件供您參考。
• 有沒有一種方法可以在導入期間應用正確的（數字）日期格式？

提前致謝。

數據表回复：在JMP 15中需要幫助將日期格式從字符轉換為數字

這是獲取所需內容的蠻力方法。我已附上完整的數據表。

If( Row() == 1,
 monthList = {"January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November",
 "December"}
);
myDate = Date MDY(
 Contains( monthList, Word( 2, :Name( "Current Date Format (character)" ), ", " ) ),
 Num( Word( 3, :Name( "Current Date Format (character)" ), ", " ) ),
 Num( Word( 4, :Name( "Current Date Format (character)" ), ", " ) )
);
If(
 Word( -1, :Name( "Current Date Format (character)" ), ", " ) == "PM" & Num(
  Word( 5, :Name( "Current Date Format (character)" ), ",: " )
 ) < 12,
 myDate = myDate + Num( Word( 5, :Name( "Current Date Format (character)" ), ",: " ) ) * 3600 + 3600 * 12,
 myDate = myDate + Num( Word( 5, :Name( "Current Date Format (character)" ), ",: " ) ) * 3600
);
myDate = myDate + Num( Word( 6, :Name( "Current Date Format (character)" ), ",: " ) ) * 60 + Num(
 Word( 7, :Name( "Current Date Format (character)" ), ",: " )
);

回复：在JMP 15中需要幫助將日期格式從字符轉換為數字

這是使用正則表達式的另一種可能，最短的實現可能是下面的版本2，在公式中另外使用了informat（）。 從日期字符串中讀取信息後，可以通過多種方法將其轉換為數字日期。

如果您在Excel中以數字方式輸入日期，最好在Excel中更改格式，以便JMP可以讀取。

正則表達式很棒，我喜歡它！

 

Names Default To Here( 1 );

// AA for conversion of month
month_AA = Associative Array(
 {"January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"},
 {"01", "02", "03", "04", "05", "06", "07", "08", "09", "10", "11", "12"}
);

date_str = "Wednesday, November 18, 2020, 12:45:00 PM";
date_str = "Friday, November 20, 2020, 8:10:00 AM";
regex_str = "(\w+), (\w+) (\d+), (\d+), (\d+):(\d+):(\d+) (PM|AM)";

// 1st version generating a list and building string thereof 
date_component_lst = Regex Match( date_str, regex_str );
date_component_lst[6] = char(num(date_component_lst[6]) + match(date_component_lst[9], "AM", 0, "PM", 12));
date_str1 = date_component_lst[5] || "-" || month_AA[date_component_lst[3]] || "-" || date_component_lst[4] || "T" || date_component_lst[6] || ":"
 || date_component_lst[7] || ":" || date_component_lst[8];

// 2nd version generating a string, to be used by "Parse Date ()" do directly convert it into a date
date_str2 = Regex( date_str, regex_str, "\3 \2 \4 \5:\6:\7 \8" );