R中的readPDF（tm包）

Question

我嘗試在R中閱讀一些在線pdf文檔。我使用了readRDF函數。 我的腳本是這樣的

safex <- readPDF(PdftotextOptions='-layout')(elem=list(uri='C:/Users/FCG/Desktop/NoteF7000.pdf'),language='en',id='id1')

R顯示運行命令的狀態為309的消息。我嘗試了不同的pdftotext選項。 但是，這是相同的信息。 並且創建的文本文件沒有內容。

任何人都可以閱讀這個PDF格式

Answer 1

readPDF有錯誤 ，可能不值得打擾（查看這個記錄良好的斗爭 ）。

假如說...

1. 你已經安裝了xpdf （詳見這里 ）

2. 您的PATH全部有序（請參閱此處了解如何執行此操作的詳細信息）並重新啟動計算機。

那么你可能最好避免使用readPDF ，而是使用這種解決方法：

system(paste('"C:/Program Files/xpdf/pdftotext.exe"', 
             '"C:/Users/FCG/Desktop/NoteF7000.pdf"'), wait=FALSE)

然后把文本文件讀成R就好了......

require(tm)
mycorpus <- Corpus(URISource("C:/Users/FCG/Desktop/NoteF7001.txt"))

並試着確認它進展順利：

inspect(mycorpus)

A corpus with 1 text document

The metadata consists of 2 tag-value pairs and a data frame
Available tags are:
  create_date creator 
Available variables in the data frame are:
  MetaID 

[[1]]
Market Notice
Number: Date F7001 08 May 2013

New IDX SSF (EWJG) The following new IDX SSF contract will be added to the list and will be available for trade today.

Summary Contract Specifications Contract Code Underlying Instrument Bloomberg Code ISIN Code EWJG EWJG IShares MSCI Japan Index Fund (US) EWJ US EQUITY US4642868487 1 (R1 per point)

Contract Size / Nominal

Expiry Dates & Times

10am New York Time; 14 Jun 2013 / 16 Sep 2013

Underlying Currency Quotations Minimum Price Movement (ZAR) Underlying Reference Price

USD/ZAR Bloomberg Code (USDZAR Currency) Price per underlying share to two decimals. R0.01 (0.01 in the share price)

4pm underlying spot level as captured by the JSE.

Currency Reference Price

The same method as the one utilized for the expiry of standard currency futures on standard quarterly SAFEX expiry dates.

JSE Limited Registration Number: 2005/022939/06 One Exchange Square, Gwen Lane, Sandown, South Africa. Private Bag X991174, Sandton, 2146, South Africa. Telephone: +27 11 520 7000, Facsimile: +27 11 520 8584, www.jse.co.za

Executive Director: NF Newton-King (CEO), A Takoordeen (CFO) Non-Executive Directors: HJ Borkum (Chairman), AD Botha, MR Johnston, DM Lawrence, A Mazwai, Dr. MA Matooane , NP Mnxasana, NS Nematswerani, N Nyembezi-Heita, N Payne Alternate Directors: JH Burke, LV Parsons

Member of the World Federation of Exchanges

Company Secretary: GC Clarke
Settlement Method

Cash Settled

-

Clearing House Fees -

On-screen IDX Futures Trading: o 1 BP for Taker (Aggressor) o Zero Booking Fees for Maker (Passive) o No Cap o Floor of 0.01 Reported IDX Futures Trades o 1.75 BP for both buyer and seller o No Cap o Floor of 0.01

Initial Margin Class Spread Margin V.S.R. Expiry Date

R 10.00 R 5.00 3.5 14/06/2013, 16/09/2013

The above instrument has been designated as "Foreign" by the South African Reserve Bank

Should you have any queries regarding IDX Single Stock Futures, please contact the IDX team on 011 520-7399 or idx@jse.co.za

Graham Smale Director: Bonds and Financial Derivatives Tel: +27 11 520 7831 Fax:+27 11 520 8831 E-mail: grahams@jse.co.za

Distributed by the Company Secretariat +27 11 520 7346

Page 2 of 2