Java SimpleDateFormat 将问题解析为 WEKA
我发誓我使用了正确的日期格式，但在加载到 WEKA 时我不断收到解析错误。
"MonFeb2116:00:00+0000"
"EEEMMMddHH:mm:ssZ"
以下是一个示例数据集：
@RELATION example
@ATTRIBUTE tweetid STRING
@ATTRIBUTE timestamp DATE "EEEMMMddhh:mm:ssZ"
@ATTRIBUTE I NUMERIC
@ATTRIBUTE a NUMERIC
@ATTRIBUTE cool NUMERIC
@ATTRIBUTE foo NUMERIC
@ATTRIBUTE bar NUMERIC
@ATTRIBUTE temp NUMERIC
@ATTRIBUTE class {POS,NEG}
@DATA
39715973388828673,"MonFeb2116:00:00+0000",0,0,0,0,2,2,?
39716148329197568,"MonFeb2116:00:42+0000",0,1,0,0,0,1,?
39715973388828673,"MonFeb2116:00:51+0000",1,0,0,0,0,0,?
39723030380941312,"MonFeb2116:28:03+0000",0,0,0,0,0,0,?
39723030531944448,"MonFeb2116:28:03+0000",0,0,0,0,0,0,?
39723031433707520,"MonFeb2116:28:03+0000",0,0,0,0,0,0,?
WEKA 错误：
unparseable date "MonFeb2116:00:00+0000, read Token[MonFeb2116:00:00+0000], line 21
已使用 API 文档进行双重检查 - 遗漏了什么？
http://download.oracle.com/javase /1.4.2/docs/api/java/text/SimpleDateFormat.html
编辑 --------------
@RELATION example
@ATTRIBUTE tweetid STRING
@ATTRIBUTE timestamp DATE "EEE MMM dd hh:mm:ss Z"
@ATTRIBUTE I NUMERIC
@ATTRIBUTE a NUMERIC
@ATTRIBUTE cool NUMERIC
@ATTRIBUTE foo NUMERIC
@ATTRIBUTE love NUMERIC
@ATTRIBUTE temp NUMERIC
@ATTRIBUTE class {POS,NEG}
@DATA
39715973388828673,"Mon Feb 21 16:00:00 +0000",0,0,0,0,2,2,?
39716148329197568,"Mon Feb 21 16:00:42 +0000",0,1,0,0,0,1,?
39715973388828673,"Mon Feb 21 16:00:51 +0000",1,0,0,0,0,0,?
39723030380941312,"Mon Feb 21 16:28:03 +0000",0,0,0,0,0,0,?
39723030531944448,"Mon Feb 21 16:28:03 +0000",0,0,0,0,0,0,?
39723031433707520,"Mon Feb 21 16:28:03 +0000",0,0,0,0,0,0,?
格式化日期以用空格分隔标记。还没在WEKA打球...
I swear I'm using the correct date format but I keep getting a parse error when loading into WEKA.
"MonFeb2116:00:00+0000"
"EEEMMMddHH:mm:ssZ"
Here is an example dataset:
@RELATION example
@ATTRIBUTE tweetid STRING
@ATTRIBUTE timestamp DATE "EEEMMMddhh:mm:ssZ"
@ATTRIBUTE I NUMERIC
@ATTRIBUTE a NUMERIC
@ATTRIBUTE cool NUMERIC
@ATTRIBUTE foo NUMERIC
@ATTRIBUTE bar NUMERIC
@ATTRIBUTE temp NUMERIC
@ATTRIBUTE class {POS,NEG}
@DATA
39715973388828673,"MonFeb2116:00:00+0000",0,0,0,0,2,2,?
39716148329197568,"MonFeb2116:00:42+0000",0,1,0,0,0,1,?
39715973388828673,"MonFeb2116:00:51+0000",1,0,0,0,0,0,?
39723030380941312,"MonFeb2116:28:03+0000",0,0,0,0,0,0,?
39723030531944448,"MonFeb2116:28:03+0000",0,0,0,0,0,0,?
39723031433707520,"MonFeb2116:28:03+0000",0,0,0,0,0,0,?
WEKA Error:
unparseable date "MonFeb2116:00:00+0000, read Token[MonFeb2116:00:00+0000], line 21
Have used the API documentation to double check - missing something?
http://download.oracle.com/javase/1.4.2/docs/api/java/text/SimpleDateFormat.html
EDIT -----------
@RELATION example
@ATTRIBUTE tweetid STRING
@ATTRIBUTE timestamp DATE "EEE MMM dd hh:mm:ss Z"
@ATTRIBUTE I NUMERIC
@ATTRIBUTE a NUMERIC
@ATTRIBUTE cool NUMERIC
@ATTRIBUTE foo NUMERIC
@ATTRIBUTE love NUMERIC
@ATTRIBUTE temp NUMERIC
@ATTRIBUTE class {POS,NEG}
@DATA
39715973388828673,"Mon Feb 21 16:00:00 +0000",0,0,0,0,2,2,?
39716148329197568,"Mon Feb 21 16:00:42 +0000",0,1,0,0,0,1,?
39715973388828673,"Mon Feb 21 16:00:51 +0000",1,0,0,0,0,0,?
39723030380941312,"Mon Feb 21 16:28:03 +0000",0,0,0,0,0,0,?
39723030531944448,"Mon Feb 21 16:28:03 +0000",0,0,0,0,0,0,?
39723031433707520,"Mon Feb 21 16:28:03 +0000",0,0,0,0,0,0,?
Formatted date to separate tokens with space. Still not playing ball in WEKA...
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评论（2）
您使用的是哪个默认区域设置？使用英语区域设置时，字符串
"MonFeb2116:00:00+0000"应可使用模式"EEEMMMddHH:mm:ssZ"进行解析。但请注意，如果模式或解析的字符串中不存在年份，则年份将默认为 1970 年。这可能不是您真正想要的。Which default locale are you using? Using an English locale, the String
"MonFeb2116:00:00+0000"should be parseable with the pattern"EEEMMMddHH:mm:ssZ". Note however, that the year will default to 1970, if not present in the pattern or parsed string. That is probably not what you really want.好吧，我不知道它是否能解决所有问题，但尝试将
hh（12 小时格式）更改为HH（24 小时格式）。我不确定它是否能够读取没有任何空格的“星期几/月份名称”，即使如此......您有获取该格式的值吗？如果你可以在第三个和第六个字符后面加一个空格，这会有所帮助......Well, I don't know whether it'll sort everything out or not, but try changing
hh(12-hour format) toHH(24-hour format). I'm not sure whether it'll be able to read a "day of the week / month name" without any spaces even so... do you have to get the value in that format? If you could put a space after the 3rd and 6th characters it would help...