similar to: help with RSQLite adding a new column

Hi, if i have data in the following time series format: time, amount, state 1 2222 A 1 333 B 2 45 A 2 77 B where states could be n and time periods t is there a package in R that would calculate the transition probabilities in a markov chain. for each t except t=0 to generate A B A B perhaps the best structure might

Hi there, When I extract data from SQLite to R, the data types (or modes) of the extracted data seems to be determined by the value of the first row. Please see the following example. When I put the missing values first, the column extracted is of the mode character. > str(dbGetQuery(sql.industry, + "select pya_var from annual_data3 + order by

Hi all, I just noticed (the hard way of course) that when a query returns 0 rows, the columns in the resulting data.frame get dropped as well. See the following example code (where conn is an active connection to an SQLite db): > dbGetQuery(conn, "select 1 as hey, 2 as ho where 1") hey ho 1 1 2 > dbGetQuery(conn, "select 1 as hey, 2 as ho where 0") data frame

I'd like to search for a particular string in an SQLite database using RSQLite, but I'm running into problems constructing the query properly, because of embedded quotes and parens in the string. Is there a function that escapes these for me, or some other fixup that would let me do the queries below? In the real situation I don't have control over what strings get searched for.

Hello, I am trying to import data from an SQLite database to R. Unfortunately, I seem to get wrong data when I try to import very large numbers. For example: I look at the database via SQLiteStudio(v.1.1.3) and I see the following values: OrderID Day TimeToclose 1 2009-11-25 29467907000 2 2009-11-25 29467907000 3 2009-11-25 29467907000 Now I run this R Code: >

Dear all, I'm trying to import a csv file into sqlite3 and from there into R. Everything looks fine exepct that R outputs the character values in an odd fashion: they are shown as "\"CHARACTER\"" instead of "CHARACTER", but only if I show the character variable as a vector. Does someone know why this happens? Below is a sample code. The first part is written in

What am I doing wrong, or is the \r that I'm getting in the example below a bug? > a <- (1:10) > b <- (LETTERS[1:10]) > df <- as.data.frame(cbind(a, b)) > > df a b 1 1 A 2 2 B 3 3 C 4 4 D 5 5 E 6 6 F 7 7 G 8 8 H 9 9 I 10 10 J > library(RSQLite) > drv <- dbDriver("SQLite") > con <- dbConnect(drv, dbname = "Test")

What am I doing wrong, or is the \r that I'm getting in the example below a bug? > a <- (1:10) > b <- (LETTERS[1:10]) > df <- as.data.frame(cbind(a, b)) > > df a b 1 1 A 2 2 B 3 3 C 4 4 D 5 5 E 6 6 F 7 7 G 8 8 H 9 9 I 10 10 J > library(RSQLite) > drv <- dbDriver("SQLite") > con <- dbConnect(drv, dbname = "Test")

(I think this is being caused by the new methods package in RC.) In the RC (March 24) some of my packages are generating a Note Note: Method with signature "MySQLConnection#integer" chosen for function "coerce", target signature "TSMySQLConnection#integer". "dbObjectId#integer" would also be valid This is coming from a call to dbGetQuery() in package

RSQLite 0.6-7 has been uploaded to CRAN and should hit a mirror near you in the next few days. This version changes the behavior of the dbGetQuery method to make it more consistent with dbSendQuery. Specifically: 1. dbGetQuery now closes a complete result set as dbSendQuery does. 2. If there is an incomplete result set open, dbGetQuery still opens a new temporary connection, but now issues

RSQLite 0.6-7 has been uploaded to CRAN and should hit a mirror near you in the next few days. This version changes the behavior of the dbGetQuery method to make it more consistent with dbSendQuery. Specifically: 1. dbGetQuery now closes a complete result set as dbSendQuery does. 2. If there is an incomplete result set open, dbGetQuery still opens a new temporary connection, but now issues

Dear R-helpers, I have been using \n in my plot titles to split long titles into two lines. I recently tried combining \n and plotmath which still gives me two lines for the title but also a weird blank spacing. A simple example is as follows: plot(1:10, main=expression(paste("Exposure\nTemp (", degree*F, ")"))) Is there something I'm missing to close the spacing.

Dear list, I want to insert a recorde into a SQLite table by dbGetQuery(), but there is a problem when the value contains quotation mark. > dd<-data.frame(txt=c("having both ' and \" in character.","OK")) > library(RSQLite) Loading required package: DBI > con<-dbConnect(dbDriver("SQLite"),":memory:") >

Full_Name: Christian Hoffmann Version: 2.4.0 OS: Win 2000 Submission from: (NULL) (193.134.202.252) Database queries using the combination DBI + ROracle are handicapped by quirks in the pipeline between the textual representation of the query and the database engine Oracle. Comments and linefeed at start are interfering: dbGetQuery(conn, query): works: dbGetQuery(conn, "select *

Hi there, I had an error when using RSQLite. My code and the error message are the following: > dbGetQuery(sql.dispersion, + "create table monthly_data_temp as + select a.*, b.industry + from monthly_data as a left join + siccd_industry_ff49 as b + on a.siccd = b.siccd + order by permno, date") Error

Hi Philip, You've probably realized by now that R doesn't like column names that start with a number. If you try to access an R-dataframe column named 2B or 3B with the familiar "$" notation, you'll get an error: > library(DBI) > library(RSQLite) > con2 <- dbConnect(SQLite(), "~/R_Dir/lahmansbaseballdb.sqlite") > Hack12Batting <-

This is really a feature of SQL, not R. SQL requires that you double quote column names that start with numbers, include spaces, etc., or that are SQL key words. E.g., > d <- data.frame(Order=c("sit","stay","heel"), Where=c("here","there","there"), From=c("me","me","you")) >

Hello, I'm new to R so this is probably a simple question for somebody. I have an RScript that reads a CSV on the disk using read.table(...). It then does a boxM test using that data. However, I'm now trying to load the same data via an SQL command, but I can't seem to get the data structure defined so R will like it -- using the included "iris" dataset. I've tried

Hi all- I am stumped. The code in A. returns errors at lines 14 and 15 and fails to load series1 and series2. However, in B., if temp1 and temp2 are called again (which returns a "Table exists" error; see lines 14-17 in B.) series1 and series2 load correctly. Any ideas? Also-I am open to any suggestions to improve the code as I am a horrific programmer. Thanks A. 1 >

The double quotes are required by SQL if a name is not of the form letter-followed-by-any-number-of-letters-or-numbers or if the name is a SQL keyword like 'where' or 'select'. If you are doing this from a function, you may as well quote all the names. -Bill On Fri, Oct 2, 2020 at 6:18 PM Philip <herd_dog at cox.net> wrote: > The \?2B\? worked. Have no idea why. Can