Displaying 20 results from an estimated 3000 matches similar to: "eval and as.name"
2012 Oct 11
2
simple parsing question?
I am using the getQuote function in the Quantmod package to retrieve the % change for a stock as follows:
> getQuote("aapl",what=yahooQF(c("Change Percent (Real-time)")))
Trade Time %Change (RT)
aapl 2012-10-11 03:41:00 N/A - -1.67%
How can I extract the numeric "change %" which is being returned as a factor so that I can use it in other
2009 Mar 05
1
listing functions in base package
How can I print the definition of a function that is in the base
package?
for example, if I type:
which.min
I get
function (x)
.Internal(which.min(x))
<environment: namespace:base>
How can I see the definition of this function?
Thanks.
2009 Mar 05
3
character string as object name
Can someone please tell me why the following (last line) doesn't work
(as I expect it to :-)
library(quantmod)
a = getSymbols("MSFT",from="2009-3-01")
a
MSFT
eval(as.name(a))
MSFT$MSFT.Adjusted
b=paste(a,'$MSFT.Adjusted',sep='')
b
eval(as.name(b))
Why does this last line not work the way the earlier eval does?
Thanks.
2013 Nov 18
3
Sending a matrix in an email
I have a matrix which has colnames and I would like to send this matrix using sendmailR. How can I convert this simple matrix to a format which can be used as the body variable in sendmailR? I see how I can create a file attachment using mime_part but I would like to send the matrix in the body of the email.
The matrix looks like:
ABD DEF GHI JKL MNO TOT
[1,] 0.44 0.81 1.67 0.37
2009 Feb 09
3
pause in function execution
I would like to have a function which gets data, does a calculation
and prints a result and then waits some number of seconds and
repeats. If I use Sys.sleep, the execution is pausing but the
function output is buffered so that it all comes out when the function
terminates. How can I get output while the function continues to
execute?
2017 Sep 01
3
How to use getSymbols() to get annual data
Dear Sir/Madam,
How to use getSymbols() to get annual data? For example, I need the annual stock price of APPLE from the year 2000 to 2016. How to write the command? I only know how to get the daily data. It is:
getSymbols("AAPL",from="2000-01-01",to="2016-12-31")
Thank you very much.
Have a good week!
Best regards,
Yingrui Liu
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2010 Sep 10
2
[xts, quantmod] segfault probelm when I work with memcpy function
Hi,
I work with SEXP C code and with xts and quantmod packages. I try to
touch how xts internal works.
So we have R session and:
> ls()
character(0)
> getSymbols('AAPL') # quantmod package
[1] "AAPL"
> ls()
[1] "AAPL"
> str(AAPL)
An ?xts? object from 2007-01-03 to 2010-09-09 containing:
Data: num [1:929, 1:6] 86.3 84 85.8 86 86.5 ...
- attr(*,
2017 Aug 02
1
Looping Through QuantMod Objects
Dear R Helpers,
I have run into a problem trying to perform a number of actions on a set
of quantmod data objects through a loop and I am hoping that this is an
easy problem for someone else as opposed to very difficult for me.
The example task is to get the first three objects of the quarterly
balance sheet for a number of companies from the getFinancials object and
put them together into a
2018 Mar 15
1
Adjusting OHCL data via quantmod
Hello,
I'm trying to do two things:
-1. Ensure that I understand how quantmod adjust's OHLC data
-2. Determine how I ought to adjust my data.
My overarching-goal is to adjust my OHLC data appropriately to minimize the
difference between my backtest returns, and the returns I would get if I
was trading for real (which I'll be doing shortly).
Background:
-1. I'm using Alpha
2009 Feb 07
1
Yahoo data downloading problem
Hi,
I got some problems while was trying to download data from Yahoo using
yahoo.get.hist.quote() function. My script is as follows :
app <- yahoo.get.hist.quote("aapl", start="02/07/09", end="02/07/06",
quote="close")
However I got following error :
trying URL
2011 Oct 24
2
Date column in downloaded date
Hi All:
If I download yahoo data by getSymbols() in R, the date column gets
accompanied along with the downloaded data. There is no column header for
the date column to access separately.
What is the way to eliminate the date column?
If I want to draw a xy scatter plot with the downloaded price (suppose AAPL
vs NASDAQ), I think the date column is creating problem and the plot
function is not
2013 Nov 06
1
Multiple String word replacements: Performance Issue
Dear experts,
I?ve been on this for weeks now, and couldn?t find a solution..Sorry for the long description. I figured I post many details, so you get the problem entirely, although it?s not hard to grasp.
**Situation:**
Data frame consisting of 4 million entries (total size: 250 MB). Two columns: `ID` and `TEXT`. Text strings are each up to 200 characters.
**Task:**
Preprocessing the text
2009 Jun 15
2
GARCH:: False Convergence
Dear R users,
I am trying to use tseries' garch function in order to determine the
volatility of a return series generated by quantmod. Here is the code that I
am using:
> library(quantmod)
> getSymbols("AAPL")
convert daily closing prices into continuous log returns
> dret<-dailyReturn(AAPL,type='log')
check to see that the autocorrelations decay
>
2006 Feb 20
2
Oracle & Ruby on Rails
I''ve a remote database create using Oracle. This database use schemas.
I tried to connect to it using Ruby On Rails,with this file Database.yml
:
development:
adapter: oci
host: liber
database: ENERGIA
username: user
password: pass
test:
adapter: oci
host: liber
database: ENERGIA
username: user
password: pass
production:
adapter: oci
host: liber
database:
2009 Feb 25
8
learning R
I was wondering why the following doesn't work:
> a=c(1,2)
> names(a)=c("one","two")
> a
one two
1 2
>
> names(a[2])
[1] "two"
>
> names(a[2])="too"
> names(a)
[1] "one" "two"
> a
one two
1 2
I must not be understanding some basic concept here.
Why doesn't the 2nd name change to
2009 Feb 25
8
learning R
I was wondering why the following doesn't work:
> a=c(1,2)
> names(a)=c("one","two")
> a
one two
1 2
>
> names(a[2])
[1] "two"
>
> names(a[2])="too"
> names(a)
[1] "one" "two"
> a
one two
1 2
I must not be understanding some basic concept here.
Why doesn't the 2nd name change to
2011 Oct 18
1
problem with quantmod package
i am using quantmod package.it get stock quotes from google finanace. but
unfortunately i am not able to get the quotations of some stocks(e.g.
NSE:TCS,NSE:SAIL ) through the "getSymbol" command of this package although
they are available in the google finance website. anyone please help me.
thanks in advance.....
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2009 Sep 03
1
Using rsync for buidling Oracle standbys.
Hi,
We currently use rsync to create an Oracle standby on a target box from an existing standby by copying all the datafiles while the source standby is in recovery status. We are occasionally running into datafile corruptions being reported by oracle when it is recovering the new standby. Oracle support says they don't recommend copying files while the changes being applied to them unless
2010 Oct 22
2
Combining the values of two variables into one
I start with:
v1<-c(1,3,5,7)
v2<-c(2,4,6,8)
And I want to end up with:
v3<-c(12,34,56,78)
How do I get there?
Thanks,
David S. Herzberg, Ph.D.
Vice President, Research and Development
Western Psychological Services
12031 Wilshire Blvd.
Los Angeles, CA 90025-1251
Phone: (310)478-2061 x144
FAX: (310)478-7838
email: davidh@wpspublish.com
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2016 Aug 31
3
source() does not include added code
1. File is (was) saved.
2. The added code is
t(tradeStats("macross"))
with 2 )'s.
I'd appreciate if someone with QuantStrat installed, to try this
and see if they get a different result. My R and RStudio and
QuantStrat libraries are all current.
I get the chart and this much output.
> source('~/CodingData/RCode/Quantstrat1/maCross.R')
[1] "2001-06-27