Dav*_*ang 5 r fread data.table
我最近一直在学习data.table.但是,当我用来fread从" http://dl.dropbox.com/u/20498362/GSS.csv " 读取数据时,R崩溃了一个段错误.我该如何进一步调查？要重现只需下载文件并输入:
fread("GSS.csv")
该文件有许多NA变量; 第一列也缺少列名.但是,如果我添加"rownames = TRUE",它仍然无效.
谢谢!
更新：现已在 CRAN 的 v1.9.4 中修复。
之前的回答...
非常感谢您提供可重现的示例！我也看到了崩溃。极好的！！
让我们继续verbose=TRUE寻找更多线索......
$ R
R version 3.0.2 (2013-09-25) -- "Frisbee Sailing"
Copyright (C) 2013 The R Foundation for Statistical Computing
Platform: x86_64-pc-linux-gnu (64-bit)
> require(data.table)
Loading required package: data.table
data.table 1.8.10 For help type: help("data.table")
> fread("GSS.csv", verbose=TRUE)
Detected eol as \n only (no \r afterwards), the UNIX and Mac standard.
Using line 30 to detect sep (the last non blank line in the first 'autostart') ... sep=','
Found 613 columns
First row with 613 fields occurs on line 1 (either column names or first row of data)
All the fields on line 1 are character fields. Treating as the column names.
Count of eol after first data row: 55088
Subtracted 1 for last eol and any trailing empty lines, leaving 55087 data rows
Type codes: 3002000030033030000033003000000033000300330000000030000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000003330003330000000000000000000000000000000000000000000000000003330000000000000003000303000000000000000000000000000000000033000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000030000000000000000000000303 (first 5 rows)
Type codes: 3002000030033030000033003330000033032300333300000033000033330000000000000000000000000000000000000000000000000003300003333333330000000000000000000000300030000000000000000000000000000000000000000000000000000000000000000003333300003330000000033000000000000000000000000000000000000000000000000000000000000000000000000333000000000000300000003333333330000000000000000000000000000000000000000000000000003332000000000000003303333000000000000000003330000003000000333333333333333333333333300000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000030033333330300000000000333 (+middle 5 rows)
Type codes: 3002000033033033000033003333000033032300333300000033000033333330000000000000000000000000000000000000000000000003300003333333330000000000000000000000300030000000000000300000000000000000000000000000000000000000000000000003333300003330000000033000000000000000000000000000000000000000000000000000000000000000000000000333000000000000300000003333333330000000000000000000000000000000000000000000000000003332200000300033003303333000000000000000003330003333000000333333333333333333333333300000000000000000000000030030000000000000000000000000000000000000000000000000000000000000000000000000000000030033333330300000000000333 (+last 5 rows)
Bumping column 39 from INT to INT64 on data row 1614, field contains '"working class"'
Bumping column 39 from INT64 to REAL on data row 1614, field contains '"working class"'
Bumping column 39 from REAL to STR on data row 1614, field contains '"working class"'
Bumping column 225 from INT to INT64 on data row 1614, field contains '"disagree"'
Bumping column 225 from INT64 to REAL on data row 1614, field contains '"disagree"'
Bumping column 225 from REAL to STR on data row 1614, field contains '"disagree"'
Bumping column 226 from INT to INT64 on data row 1614, field contains '"disagree"'
Bumping column 226 from INT64 to REAL on data row 1614, field contains '"disagree"'
Bumping column 226 from REAL to STR on data row 1614, field contains '"disagree"'
Bumping column 227 from INT to INT64 on data row 1614, field contains '"disagree"'
Bumping column 227 from INT64 to REAL on data row 1614, field contains '"disagree"'
Bumping column 227 from REAL to STR on data row 1614, field contains '"disagree"'
Bumping column 228 from INT to INT64 on data row 1614, field contains '"disagree"'
Bumping column 228 from INT64 to REAL on data row 1614, field contains '"disagree"'
Bumping column 228 from REAL to STR on data row 1614, field contains '"disagree"'
Bumping column 232 from INT to INT64 on data row 1614, field contains '"agree"'
Bumping column 232 from INT64 to REAL on data row 1614, field contains '"agree"'
Bumping column 232 from REAL to STR on data row 1614, field contains '"agree"'
Bumping column 233 from INT to INT64 on data row 1614, field contains '"agree"'
Bumping column 233 from INT64 to REAL on data row 1614, field contains '"agree"'
Bumping column 233 from REAL to STR on data row 1614, field contains '"agree"'
Bumping column 307 from INT to INT64 on data row 1614, field contains '"no"'
Bumping column 307 from INT64 to REAL on data row 1614, field contains '"no"'
Bumping column 307 from REAL to STR on data row 1614, field contains '"no"'
Bumping column 308 from INT to INT64 on data row 1614, field contains '"no"'
Bumping column 308 from INT64 to REAL on data row 1614, field contains '"no"'
Bumping column 308 from REAL to STR on data row 1614, field contains '"no"'
Bumping column 309 from INT to INT64 on data row 1614, field contains '"no"'
Bumping column 309 from INT64 to REAL on data row 1614, field contains '"no"'
Bumping column 309 from REAL to STR on data row 1614, field contains '"no"'
Bumping column 310 from INT to INT64 on data row 1614, field contains '"no"'
Bumping column 310 from INT64 to REAL on data row 1614, field contains '"no"'
Bumping column 310 from REAL to STR on data row 1614, field contains '"no"'
Bumping column 311 from INT to INT64 on data row 1614, field contains '"no"'
Bumping column 311 from INT64 to REAL on data row 1614, field contains '"no"'
Bumping column 311 from REAL to STR on data row 1614, field contains '"no"'
Bumping column 3 from INT to INT64 on data row 9121, field contains '2.54999995231628'
Bumping column 3 from INT64 to REAL on data row 9121, field contains '2.54999995231628'
Bumping column 234 from INT to INT64 on data row 9121, field contains '"not feel"'
Bumping column 234 from INT64 to REAL on data row 9121, field contains '"not feel"'
Bumping column 234 from REAL to STR on data row 9121, field contains '"not feel"'
Bumping column 235 from INT to INT64 on data row 9121, field contains '"feel"'
Bumping column 235 from INT64 to REAL on data row 9121, field contains '"feel"'
Bumping column 235 from REAL to STR on data row 9121, field contains '"feel"'
Bumping column 236 from INT to INT64 on data row 9121, field contains '"feel"'
Bumping column 236 from INT64 to REAL on data row 9121, field contains '"feel"'
Bumping column 236 from REAL to STR on data row 9121, field contains '"feel"'
Bumping column 237 from INT to INT64 on data row 9121, field contains '"not feel"'
Bumping column 237 from INT64 to REAL on data row 9121, field contains '"not feel"'
Bumping column 237 from REAL to STR on data row 9121, field contains '"not feel"'
Bumping column 238 from INT to INT64 on data row 9121, field contains '"feel"'
Bumping column 238 from INT64 to REAL on data row 9121, field contains '"feel"'
Bumping column 238 from REAL to STR on data row 9121, field contains '"feel"'
Bumping column 239 from INT to INT64 on data row 9121, field contains '"feel"'
Bumping column 239 from INT64 to REAL on data row 9121, field contains '"feel"'
Bumping column 239 from REAL to STR on data row 9121, field contains '"feel"'
Bumping column 2 from INT to INT64 on data row 12121, field contains '1.23500001430511'
Bumping column 2 from INT64 to REAL on data row 12121, field contains '1.23500001430511'
Bumping column 49 from INT to INT64 on data row 12121, field contains '"now and then"'
Bumping column 49 from INT64 to REAL on data row 12121, field contains '"now and then"'
Bumping column 49 from REAL to STR on data row 12121, field contains '"now and then"'
Bumping column 330 from INT to INT64 on data row 12121, field contains '"worst kind"'
Bumping column 330 from INT64 to REAL on data row 12121, field contains '"worst kind"'
Bumping column 330 from REAL to STR on data row 12121, field contains '"worst kind"'
Bumping column 609 from INT to INT64 on data row 12121, field contains '"good purpose"'
Bumping column 609 from INT64 to REAL on data row 12121, field contains '"good purpose"'
Bumping column 609 from REAL to STR on data row 12121, field contains '"good purpose"'
Bumping column 610 from INT to INT64 on data row 12121, field contains '"most of the time"'
Bumping column 610 from INT64 to REAL on data row 12121, field contains '"most of the time"'
Bumping column 610 from REAL to STR on data row 12121, field contains '"most of the time"'
Bumping column 98 from INT to INT64 on data row 15580, field contains '"somewhat agree"'
Bumping column 98 from INT64 to REAL on data row 15580, field contains '"somewhat agree"'
Bumping column 98 from REAL to STR on data row 15580, field contains '"somewhat agree"'
Bumping column 99 from INT to INT64 on data row 15580, field contains '"somewhat agree"'
Bumping column 99 from INT64 to REAL on data row 15580, field contains '"somewhat agree"'
Bumping column 99 from REAL to STR on data row 15580, field contains '"somewhat agree"'
Bumping column 100 from INT to INT64 on data row 15580, field contains '"strongly agree"'
Bumping column 100 from INT64 to REAL on data row 15580, field contains '"strongly agree"'
Bumping column 100 from REAL to STR on data row 15580, field contains '"strongly agree"'
Bumping column 101 from INT to INT64 on data row 15580, field contains '"somewht disagree"'
Bumping column 101 from INT64 to REAL on data row 15580, field contains '"somewht disagree"'
Bumping column 101 from REAL to STR on data row 15580, field contains '"somewht disagree"'
Bumping column 102 from INT to INT64 on data row 15580, field contains '"strongly agree"'
Bumping column 102 from INT64 to REAL on data row 15580, field contains '"strongly agree"'
Bumping column 102 from REAL to STR on data row 15580, field contains '"strongly agree"'
Bumping column 103 from INT to INT64 on data row 15580, field contains '"strongly agree"'
Bumping column 103 from INT64 to REAL on data row 15580, field contains '"strongly agree"'
Bumping column 103 from REAL to STR on data row 15580, field contains '"strongly agree"'
Bumping column 104 from INT to INT64 on data row 15580, field contains '"somewhat agree"'
Bumping column 104 from INT64 to REAL on data row 15580, field contains '"somewhat agree"'
Bumping column 104 from REAL to STR on data row 15580, field contains '"somewhat agree"'
Bumping column 250 from INT to INT64 on data row 15580, field contains '"somewht disagree"'
Bumping column 250 from INT64 to REAL on data row 15580, field contains '"somewht disagree"'
Bumping column 250 from REAL to STR on data row 15580, field contains '"somewht disagree"'
Bumping column 251 from INT to INT64 on data row 15580, field contains '"somewhat agree"'
Bumping column 251 from INT64 to REAL on data row 15580, field contains '"somewhat agree"'
Bumping column 251 from REAL to STR on data row 15580, field contains '"somewhat agree"'
Bumping column 252 from INT to INT64 on data row 15580, field contains '"somewht disagree"'
Bumping column 252 from INT64 to REAL on data row 15580, field contains '"somewht disagree"'
Bumping column 252 from REAL to STR on data row 15580, field contains '"somewht disagree"'
Bumping column 254 from INT to INT64 on data row 15580, field contains '"somewht disagree"'
Bumping column 254 from INT64 to REAL on data row 15580, field contains '"somewht disagree"'
Bumping column 254 from REAL to STR on data row 15580, field contains '"somewht disagree"'
Bumping column 256 from INT to INT64 on data row 15580, field contains '"somewhat agree"'
Bumping column 256 from INT64 to REAL on data row 15580, field contains '"somewhat agree"'
Bumping column 256 from REAL to STR on data row 15580, field contains '"somewhat agree"'
Bumping column 257 from INT to INT64 on data row 15580, field contains '"somewhat agree"'
Bumping column 257 from INT64 to REAL on data row 15580, field contains '"somewhat agree"'
Bumping column 257 from REAL to STR on data row 15580, field contains '"somewhat agree"'
Bumping column 105 from INT to INT64 on data row 15581, field contains '"somewhat agree"'
Bumping column 105 from INT64 to REAL on data row 15581, field contains '"somewhat agree"'
Bumping column 105 from REAL to STR on data row 15581, field contains '"somewhat agree"'
Bumping column 253 from INT to INT64 on data row 15581, field contains '"strngly disagree"'
Bumping column 253 from INT64 to REAL on data row 15581, field contains '"strngly disagree"'
Bumping column 253 from REAL to STR on data row 15581, field contains '"strngly disagree"'
Bumping column 255 from INT to INT64 on data row 15581, field contains '"strngly disagree"'
Bumping column 255 from INT64 to REAL on data row 15581, field contains '"strngly disagree"'
Bumping column 255 from REAL to STR on data row 15581, field contains '"strngly disagree"'
Bumping column 64 from INT to INT64 on data row 15584, field contains '"too little"'
Bumping column 64 from INT64 to REAL on data row 15584, field contains '"too little"'
Bumping column 64 from REAL to STR on data row 15584, field contains '"too little"'
Bumping column 65 from INT to INT64 on data row 15584, field contains '"too little"'
Bumping column 65 from INT64 to REAL on data row 15584, field contains '"too little"'
Bumping column 65 from REAL to STR on data row 15584, field contains '"too little"'
Bumping column 66 from INT to INT64 on data row 15584, field contains '"too little"'
Bumping column 66 from INT64 to REAL on data row 15584, field contains '"too little"'
Bumping column 66 from REAL to STR on data row 15584, field contains '"too little"'
Bumping column 67 from INT to INT64 on data row 15584, field contains '"too little"'
Bumping column 67 from INT64 to REAL on data row 15584, field contains '"too little"'
Bumping column 67 from REAL to STR on data row 15584, field contains '"too little"'
Bumping column 71 from INT to INT64 on data row 17053, field contains '"pay more"'
Bumping column 71 from INT64 to REAL on data row 17053, field contains '"pay more"'
Bumping column 71 from REAL to STR on data row 17053, field contains '"pay more"'
Bumping column 72 from INT to INT64 on data row 17053, field contains '"neither"'
Bumping column 72 from INT64 to REAL on data row 17053, field contains '"neither"'
Bumping column 72 from REAL to STR on data row 17053, field contains '"neither"'
Bumping column 73 from INT to INT64 on data row 17053, field contains '"neither"'
Bumping column 73 from INT64 to REAL on data row 17053, field contains '"neither"'
Bumping column 73 from REAL to STR on data row 17053, field contains '"neither"'
Bumping column 74 from INT to INT64 on data row 17053, field contains '"neither"'
Bumping column 74 from INT64 to REAL on data row 17053, field contains '"neither"'
Bumping column 74 from REAL to STR on data row 17053, field contains '"neither"'
Bumping column 75 from INT to INT64 on data row 17053, field contains '"neither"'
Bumping column 75 from INT64 to REAL on data row 17053, field contains '"neither"'
Bumping column 75 from REAL to STR on data row 17053, field contains '"neither"'
Bumping column 76 from INT to INT64 on data row 17053, field contains '"in favor"'
Bumping column 76 from INT64 to REAL on data row 17053, field contains '"in favor"'
Bumping column 76 from REAL to STR on data row 17053, field contains '"in favor"'
Bumping column 77 from INT to INT64 on data row 17053, field contains '"neither"'
Bumping column 77 from INT64 to REAL on data row 17053, field contains '"neither"'
Bumping column 77 from REAL to STR on data row 17053, field contains '"neither"'
Bumping column 78 from INT to INT64 on data row 17053, field contains '"neither"'
Bumping column 78 from INT64 to REAL on data row 17053, field contains '"neither"'
Bumping column 78 from REAL to STR on data row 17053, field contains '"neither"'
Bumping column 79 from INT to INT64 on data row 17053, field contains '"spend same"'
Bumping column 79 from INT64 to REAL on data row 17053, field contains '"spend same"'
Bumping column 79 from REAL to STR on data row 17053, field contains '"spend same"'
Bumping column 80 from INT to INT64 on data row 17053, field contains '"spend more"'
Bumping column 80 from INT64 to REAL on data row 17053, field contains '"spend more"'
Bumping column 80 from REAL to STR on data row 17053, field contains '"spend more"'
Bumping column 81 from INT to INT64 on data row 17053, field contains '"spend same"'
Bumping column 81 from INT64 to REAL on data row 17053, field contains '"spend same"'
Bumping column 81 from REAL to STR on data row 17053, field contains '"spend same"'
Bumping column 82 from INT to INT64 on data row 17053, field contains '"spend more"'
Bumping column 82 from INT64 to REAL on data row 17053, field contains '"spend more"'
Bumping column 82 from REAL to STR on data row 17053, field contains '"spend more"'
Bumping column 83 from INT to INT64 on data row 17053, field contains '"spend less"'
Bumping column 83 from INT64 to REAL on data row 17053, field contains '"spend less"'
Bumping column 83 from REAL to STR on data row 17053, field contains '"spend less"'
Bumping column 84 from INT to INT64 on data row 17053, field contains '"spend same"'
Bumping column 84 from INT64 to REAL on data row 17053, field contains '"spend same"'
Bumping column 84 from REAL to STR on data row 17053, field contains '"spend same"'
Bumping column 85 from INT to INT64 on data row 17053, field contains '"spend same"'
*** caught segfault ***
address 0x56a24, cause 'memory not mapped'
Traceback:
1: fread("GSS.csv", verbose = TRUE)
Possible actions:
1: abort (with core dump, if enabled)
2: normal R exit
3: exit R without saving workspace
4: exit R saving workspace
Selection:
似乎发生的情况是 132MB 文件相当稀疏（许多空白字段）。有 613 列和 55087 行。由于稀疏性，前 5 行、中间 5 行和最后 5 行不足以检测到这些列是character。当它到达此类列的第一个填充字段时，它会正确提升许多列的列类型，这通常工作正常。然后它就崩溃了。
非常感谢！我已在这里提交了错误报告：
| 归档时间： |
|
| 查看次数： |
520 次 |
| 最近记录： |