Displaying 20 results from an estimated 5000 matches similar to: "question on sqldf syntax"
2013 Jan 15
1
SQLDF column errors
I am trying to exclude integer values from a small data frame 1, d1 that
have matching hits in data frame 2, d2 (Very big) which involves matching
those hits first. I am trying to use sqldf on the df's in the following
fashion:
df1:
V1
12675
14753
16222
18765
df2: head(df2)
V1 V2
13647 rd1500
14753 rd1580
15987 rd1590
16222 rd2020.....
2013 Jun 11
1
Help needed in feature extraction from two input files
Hi,
Try this:
lines1<- readLines(textConnection("gene1 or1|1234 or3|56 or4|793
gene4 or2|347
gene5 or3|23 or7|123456789"))
lines2<-readLines(textConnection(">or1|1234
ATCGGATTCAGG
>or2|347
GAACCTATCGGGGGGGGAATTTATATATTTTA
>or3|56
ATCGGAGATATAACCAATC
>or3|23
AAAATTAACAAGAGAATAGACAAAAAAA
>or4|793
ATCTCTCTCCTCTCTCTCTAAAAA
>or7|123456789
2012 May 09
2
Problem with SQLDF - Error in sqliteExecStatement(con, statement, bind.data) : RS-DBI driver: (error in statement: no such table:
Hi All,
I am having trouble executing SQL statements on a few dataframes, but the
funny thing is that I am able to execute the statement on some other
dataframes.
To test, I have 2 very small dataframes (6 rows and some columns). One is
'lessliq', the dput is given below.
> dput(head(lessliq))
structure(list(V1 = c(50464677L, 50464846L, 50432581L, 50426614L,
50504329L, 50504735L), V2
2008 Apr 03
2
sqldf file specification, non-ASCII
Dear R-Listers,
I am a Windows user (R 2.6.2) using the development version of sqldf to
try to read a 3GB file originally stored in .sas7bdat-format. I convert
it to comma-delimited ASCII format with StatTransfer before trying to
import just the rows I need into R. The problem is that I get this
error:
> f <- file("hugedata.csv")
> DF <- sqldf("select * from f where
2011 Apr 18
2
SQLDF syntax
Hi,
I am new to R and trying to migrate from SAS. I am trying to use sqldf to
create a new table from existed table and change some of the columns. I have
table called DataOld with columns commodity, rate and total and I am trying
to create new table called DataNew with columns commodity, ratenew and
totalNew.
> sqldf("create table datanew as select commodity, ratenew as rate * 10,
>
2013 Feb 15
2
data formatting
Dear Eliza,
Try this:
Lines1<-readLines(textConnection("1911.01.01?????? 7.87
1911.01.02?????? 9.26
1911.01.03?????? 8.06
1911.01.04?????? 8.13
1911.01.05????? 12.90
1911.02.06?????? 5.45
1911.02.07?????? 3.26
1911.03.08?????? 5.70
1911.03.09?????? 9.24
1911.04.10?????? 7.60
1911.05.11????? 14.82
1911.05.12????? 14.10
1911.06.13?????? 7.87
1911.06.14?????? 9.26
2010 Jul 20
1
Error using sqldf
Hi,
I am running a query using sqldf() [package : sqldf]. The query is:-
userid <- 5
taskid <- 5
tab1 <- fn$sqldf("SELECT tobiiEvents.data1, tobiiEvents.data2,
events.`timestamp` as tobiiTime
FROM tobiiEvents
INNER JOIN events ON events.eventid = tobiiEvents.eventid
WHERE tobiiEvents.subtype = 'MOUSE' AND tobiiEvents.userid = 5 AND
tobiiEvents.taskid = 5
ORDER BY
2010 Aug 26
1
sqldf syntax
Please correct the following
> sqldf("update esc left join forwagg on esc.ym=forwagg.Date set esc.ri2=forwagg.N1 where esc.age=12","select * from main.esc")
Error in sqliteExecStatement(con, statement, bind.data) :
RS-DBI driver: (error in statement: near "left": syntax error)
Thanks.
Stephen
[[alternative HTML version deleted]]
2012 Mar 21
1
Using extract function for dates in sqldf
I'm trying to use sqldf to query for the earliest date of a blood test when
patients have had multiple tests in a given year. My query looks like this:
test11 <- sqldf("select CHILD_ID, min(SAMP_DATE)
from lab
group by CHILD_ID
having extract (year from SAMP_DATE) = 2011")
SAMP_DATE has class "date." I get the error
2013 Sep 06
2
Alignment of data sets
Hi all;
I have a data set with the format below:
Year, Day, Hour, Value
2010, 001, 0, 15.9
2010, 001, 1, 7.3
2010, 001, 2, 5.2
2010, 001, 3, 8.0
2010, 001, 4, 0.0
2010, 001, 5, 12.1
2010, 001, 6, 11.6
2010, 001, 7, 13.9
2010, 001, 8, 11.9
2010, 001, 9, 13.6
2010, 001, 10, 16.1
2010, 001, 11, 18.5
That should
2013 Feb 12
3
reorganize data
Hi R users,
Wonder if somebody could give me help on how to reshape this type of data:
-----------------------------------------------------------------------------------------------------------------------
Date:10.09.19 Time:21:39:05 Lat:N62.37.18 Long:E018.07.32
0000-0010 | 28| 28
0010-0020| 302| 302
0020-0030| 42| 42
0030-0040| 2| 2
0040-0050| 1| 1
0060-0070| 1| 1
2010 Nov 01
1
sqldf hanging on macintosh - works on windows
Have a long script that runs fine on windows (32 bit). When I try to run in
on two different macs (64 bit), however, it hangs with identical behavior.
I start with:
library(sqldf)
This results in messages:
Loading required package: DBI
Loading required package: RSQLite
Loading required package: RSQLite.extfuns
Loading required package: gsubfn
Loading required package: proto
Loading required
2009 Sep 25
2
synchronisation of time series data using interpolation
Readers,
I have data with different time stamps that I wish to plot (for example):
data set 1
time(hh:mm:ss),datum
01:00:00,500
01:00:15,600
01:00:30,750
01:00:45,720
01:01:00,700
01:01:15,725
01:01:30,640
01:01:45,710
data set 2
time,datum
01:00:12,20
01:01:01,55
01:01:55,22
The time interval in data set 1 does not change, but the time interval
in data set 2 does change, such that for a
2010 Jul 06
4
Adding two files into one and vlookup
I have two files with dates and prices in each. The number of rows in each of
them will differ. How do I create a new file which contains data from both
these files? Cbind and merge are not helpful. For cbind because the rows are
not the same replication occurs. Also if I have similar data how do I write
a vlookup kind of function? I am giving an example below:
Say Price1 file contains the
2010 Oct 15
7
Problem with merging two zoo objects
Dear all, I have following 2 zoo objects. However when I try to merge those 2 objects into one, nothing is coming as intended. Please see below the objects as well as the merged object:
> dat11
V2 V3 V4 V5
2010-10-15 13:43:54 73.8 73.8 73.8 73.8
2010-10-15 13:44:15 73.8 73.8 73.8 73.8
2010-10-15 13:45:51 73.8 73.8 73.8 73.8
2010-10-15 13:46:21 73.8 73.8 73.8 73.8
2006 Jun 29
1
initializing table and filling it out
Hi everyone,
I'm writting a script that will open multiple files in a single folder and then will do some calculations to finally save everything in a big table.
So here is the pseudo code
#read all files in the given directory
myfiles <-list.files("c:\\myDir")
#initialize table
???
#loop through files
for(f in myfiles[-1]) {
netMat <-
2013 Mar 05
1
ggplot2: two time series with different dates in a single plot
Hi
Using the ggplot2 package, I would like to obtain a plot that contains two
time series that have data points on different dates.
For instance, one data frame looks like:
date1, value1
2010-01-05, 2921.74
2010-01-08, 2703.89
2010-01-14, 3594.21
2010-01-20, 3659.22
The other data frame looks like
date2, value2
2010-01-01, 285.85
2010-01-02, 229.20
2010-01-05, 333.91
2010-01-06, 338.27
2010 Nov 02
1
class changed after execution with sqldf
When I run sqldf to merge two datasets, it's changing the Date (class date)
to a numeric value (class factor). Not sure why. Appreciate any insight.
Console output for two datasets and the merged dataset (via sqldf) listed
below.
> summary(df.aggregate)
Date Hour x
Min. :2010-07-01 0 : 64 Min. : 0.00
1st Qu.:2010-07-25 1 :
2010 Sep 06
3
Failure to aggregate
I have a (very big - 1.5 rows) dataframe with a (POSIXt" "POSIXlt") column h
(hour). Surprisingly, I cannot calculate a simple aggregate over the
dataframe.
> n.h1 = sqldf("select distinct h, count(*) from x group by h")
Error in sqliteExecStatement(con, statement, bind.data) :
RS-DBI driver: (error in statement: no such table: x)
In addition: Warning message:
In
2012 Nov 23
3
read.csv.sql() to select from a large csv file
Dear list,
Dear list,
I am using read.csv.sql() from the sqldf package to read
individual-based data from a csv file that is too large for R.
My original file contains a column called “ID” that
identifies the individual. I would like to read in data for only
one individual at a
time, for example "Bobby".
read.csv.sql("filename",sql = 'select * from file where ID =