similar to: Exceptional slowness with read.csv

?s 06:47 de 08/04/2024, Dave Dixon escreveu: > Greetings, > > I have a csv file of 76 fields and about 4 million records. I know that > some of the records have errors - unmatched quotes, specifically. > Reading the file with readLines and parsing the lines with read.csv(text > = ...) is really slow. I know that the first 2459465 records are good. > So I try this: >

Hi Dave, That's rather frustrating. I've found vroom (from the package vroom) to be helpful with large files like this. Does the following give you any better luck? vroom(file_name, delim = ",", skip = 2459465, n_max = 5) Of course, when you know you've got errors & the files are big like that it can take a bit of work resolving things. The command line tools awk

I solved the mystery, but not the problem. The problem is that there's an unclosed quote somewhere in those 5 additional records I'm trying to access. So read.csv is reading million-character fields. It's slow at that. That mystery solved. However, the the problem persists: how to fix what is obvious to the naked eye - a quote not adjacent to a comma - but that read.csv can't

data.table's fread is also fast. Not sure about error handling. But I can merge 300 csvs with a total of 0.5m lines and 50 columns in a couple of minutes versus a lifetime with read.csv or readr::read_csv On Mon, 8 Apr 2024, 16:19 Stevie Pederson, <stephen.pederson.au at gmail.com> wrote: > Hi Dave, > > That's rather frustrating. I've found vroom (from the package

That's basically what I did 1. Get text lines using readLines 2. use tryCatch to parse each line using read.csv(text=...) 3. in the catch, use?gregexpr to find any quotes not adjacent to a comma (gregexpr("[^,]\"[^,]",...) 4. escape any quotes found by adding a second quote (using str_sub from stringr) 6. parse the patched text using read.csv(text=...) 7. write out the parsed

No idea, but have you tried using ?scan to read those next 5 rows? It might give you a better idea of the pathologies that are causing problems. For example, an unmatched quote might result in some huge number of characters trying to be read into a single element of a character variable. As your previous respondent said, resolving such problems can be a challenge. Cheers, Bert On Mon, Apr 8,

? Sun, 7 Apr 2024 23:47:52 -0600 Dave Dixon <ddixon at swcp.com> ?????: > > second_records <- read.csv(file_name, skip = 2459465, nrows = 5) It may or may not be important that read.csv defaults to header = TRUE. Having skipped 2459465 lines, it may attempt to parse the next one as a header, so the second call read.csv() should probably include header = FALSE. Bert's advice

Dear list-members, I would like to calculate the difference between two points in time. To convert a 'time (GMT)'-character with the format "1/1/1999 01:01:01" into an object of class "POSIXct"', I first use the strptime() as suggested in the details help(as.POSIXct). e.g. starttime<-strptime("1/1/1999 01:01:01",format="%d/%m/%Y %H:%M:%S")

Thank you, Olly! I tried to figure out a picture about how index/query related to the B-tree block access on disk. I think I'm all messed up and failed. now I am trying to index docs in json format, and came to a question about prefix mapping: a json doc like: {"starttime":1111,"endtime":2222} considerring mapping prefix to slot number in two ways:

Hi, Suppose I have a model class which has a time field: class CreateAppointments < ActiveRecord::Migration def change create_table :appointments do |t| t.string :name t.datetime :startTime t.datetime :endTime t.string :description t.timestamps end end end When I test drive it in rails console, I can input any value int he startTime and endTime such

first, thank you,xapian! then I'd like to ask if it is possible to do a range query on terms(like the range query on values), or if it is just a wildcard(right truncation) match. the case is searching ip address bettween ?10.10.0.0? and ?10.10.255.255? the user want : 1. query "10.10.10.10" < ip < "10.10.10.12" gives "10.10.10.11" 2. query

Hi I got some strange issues on my samba4.0.1 install yesterday. It happened a while after updating my xubuntu server 13.04 not 13.10. Everything seems to be working fine except shares. Kerberos authentication seem to function properly, also DNS works fine but shares seem semi-broken. I can't mount any shares on my Windows box, including netlogon, profiles. I have one share that is

cifs-utils-5.6 samba Version 4.0.0rc3 openSUSE 12.2 LAN of XP, w7 and Linux clients under Samba4 DC and s3fs fileserver Hi I am testing the possibility of migrating from nfs to cifs to serve our Linux clients. Currently we mount the samba shares, e.g. the home directory, using nfs. The test setup is that instead of: mount -t nfs hh1:/home2 /home2 -osec=rw,krb5 I changed to: mount -t cifs

Dear All, I spent an entire evening in debugging a small, fairly simple program in R - without success. It was my Guru in Bayesian Analysis, Thomas Fridtjof, who was able to diagonose the problem. He said that it took a long time for him also to locate the problem. This program illustrates in some ways the shortcomings of the error messages that R responds with. In this case, it was quite

Hi I'm trying to get an Ubuntu 14.04 client to update its rr to a working bind dns DC with Samba 4.1.7. The setup is the same as with our openSUSE clients with sssd 1.11.15 sssd.conf id_provider = ad auth_provider = ad access_provider = ad ldap_id_mapping = False /etc/hosts 127.0.0.1 lubuntu-laptop.hh3.site lubuntu-laptop 127.0.1.1 localhost But it is sending a request for the wrong

Dear All, Need some help as I was trying to follow the guide below. https://wiki.samba.org/index.php/Samba4/HOWTO/Join_a_domain_as_a_DC Until the steps of ldbsearch -H /usr/local/samba/private/sam.ldb '(invocationid=*)' --cross-ncs objectguid and my ldbsearch reply with such a result. ldb: unable to dlopen /usr/lib64/samba/ldb/acl.so : /usr/lib64/ldb/libreplace.so: version

Hi all, James, After following James' suggestions fixing the several dbcheck errors, and having observed things for a few days, I'd like to update this issue, and hope for some new input again. :-) Summary: three DCs, all three running Version 4.5.10-SerNet-Debian-16.wheezy, samba-tool dbcheck --cross-ncs reports no errors, except for two (supposedly innocent) dangling forward links

On 16/07/2020 22:13, Yakov Revyakin wrote: > Thank you! I have food for tomorrow. Now I only want to voice some of > my considerations. > > Imagine that a domain had no trusts. At this time a PC became a member > of this domain. > After some time DC made trust with another domain. In this case > existing members don't consider?any extra configuration like adding >

Hi all, when i try to authenticate against my AD (rdesktop authentication) i got a wrong password/logname message despite my logname and password being exact , in the log i have the following . Nothing wrong for me. the only strange thing being the : stream_terminate_connection: Terminating connection - 'kdc_tcp_call_loop: tstream_read_pdu_blob_recv() -

Em 10-09-2018 10:43, Rowland Penny via samba escreveu: > On Mon, 10 Sep 2018 09:56:46 -0400 > spiderslack via samba <samba at lists.samba.org> wrote: > >> Hi, all >> >> >> I trying setting domain samba with bind9-DLZ. I followed the tutorial >> https://wiki.samba.org/index.php/Setting_up_Samba_as_an_Active_Directory_Domain_Controller, >> but not