[R-SIG-Finance] Trying to Extract Option Quotes with R

[Frank]

It looks like some of the dependencies don't load automatically. I was using
R x64 3.2.2:

1) Updated my R to the later version
2) I installed package jsonlite  ("package:"jsonlite"cannot be loaded.")
3) I installed package curl ("Error: Required package curl not found. Please
run: install.packages('curl')"
4) I updated to R x64 3.2.5 then R x64 3.3.3 re-installed the above.

I now get

" Error in data.frame(Strike = strike, Last = lastprice, Chg = change, Bid =
bid,  : 
  object 'contractsymbol' not found"

The complete output is now:

" 
version 3.3.3 (2017-03-06) -- "Another Canoe"
Copyright (C) 2017 The R Foundation for Statistical Computing
Platform: x86_64-w64-mingw32/x64 (64-bit)

R is free software and comes with ABSOLUTELY NO WARRANTY.
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Type 'license()' or 'licence()' for distribution details.

  Natural language support but running in an English locale

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Type 'demo()' for some demos, 'help()' for on-line help, or
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>      library(quantmod)
Loading required package: xts
Loading required package: zoo

Attaching package: 'zoo'

The following objects are masked from 'package:base':

    as.Date, as.Date.numeric

Loading required package: TTR
Version 0.4-0 included new data defaults. See ?getSymbols.
>      optData = getOptionChain( "XOM", Exp=NULL )
Error in data.frame(Strike = strike, Last = lastprice, Chg = change, Bid =
bid,  : 
  object 'contractsymbol' not found
Calls: getOptionChain ... <Anonymous> -> with -> with.default -> eval ->
eval -> data.frame
Execution halted


-----Original Message-----
From: R-SIG-Finance [mailto:r-sig-finance-bounces at r-project.org] On Behalf
Of Robert Sherry
Sent: Friday, May 12, 2017 11:35 AM
To: r-sig-finance at r-project.org
Subject: [R-SIG-Finance] Trying to Extract Option Quotes with R

I executed the following commands in R:

     library(quantmod)
     optData = getOptionChain( "XOM", Exp=NULL )
     nrow(optData)

The last command returned NULL. What am I doing wrong?

Bob

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