Duncan,
Since you asked, here is an updated version of my function.
# This method gets the Data.
getReturns1 <- function(symbol, norm = FALSE)
{
library(quantmod)
series = getSymbols(symbol, src = "yahoo", from = start, to = end,
auto.assign = FALSE)
length <- nrow( series )
Peter was on the right track. getSymbols() allows you to specify that
you want the value returned as an object instead of load()ed by
setting auto.assign = FALSE.
I've also made other changes to your function:
- Use requireNamespace() so you don't alter the search() path
- Use TTR::ROC() to calcu
" I am thinking that there should be an R command to
tell me about the structure of series"
?str
## perhaps also/instead
?summary
Cheers,
Bert
Bert Gunter
"The trouble with having an open mind is that people keep coming along and
sticking things into it."
-- Opus (aka Berkeley Breathed in hi
Peter,
Here is the R command and its output that you requested:
> class(AVB)
[1] "xts" "zoo"
Bob
On 8/9/2018 5:29 PM, Peter Langfelder wrote:
Well, your function uses AVB$AVB.Close, so I assumed AVB is a list (a
data frame can be thought of as a special list). What do you get when
you type cla
Duncan,
Thanks for the response. I tired the following:
> series <- getSymbols("AVB", src = "yahoo", from = start, to = end)
> series[0]
character(0)
> nrow( series )
NULL
nrow( series ) returned NULL. I do not understand why. I am thinking
that there should be an R
Well, your function uses AVB$AVB.Close, so I assumed AVB is a list (a
data frame can be thought of as a special list). What do you get when
you type class(AVB)?
Peter
On Thu, Aug 9, 2018 at 2:24 PM rsherry8 wrote:
>
> Peter,
>
> Thanks for the response. I tired the following command:
> AVB[[
Peter,
Thanks for the response. I tired the following command:
AVB[["AVB.Close"]]
and I got:
Error in AVB[["AVB.Close"]] : subscript out of bounds
Are you assuming that AVB is a data frame? I do not think AVB is a data
frame. Is there a way
for me to check?
Thanks,
Bob
On 8/9/2018 3:46
If I understand it correctly, the function getSymbols creates a
variable with the name being the stock symbol. Then use the function
get(symbol) to retrieve the value of the variable whose name is
contained in the character string `symbol'. Assign that to a variable
(e.g. AVB). You may also have to
I wrote the following function:
# This method gets historical stock data for the stock Avalon Bay whose
symbol is AVB.
getReturns <- function(norm = FALSE)
{
library(quantmod)
getSymbols("AVB", src = "yahoo", from = start, to = end)
length = length( AVB$AVB.Close )
close = a
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