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Re: adding a string to a list of number in the importing loop from a Web

  • To: mathgroup at smc.vnet.net
  • Subject: [mg125205] Re: adding a string to a list of number in the importing loop from a Web
  • From: maria giovanna dainotti <mariagiovannadainotti at yahoo.it>
  • Date: Wed, 29 Feb 2012 07:21:27 -0500 (EST)
  • Delivered-to: l-mathgroup@mail-archive0.wolfram.com

Dear All,
thanks for the previous suggestions all of them worked.

I have  a long list of elements (I just took two as example)
data4 = {{"050318", "111529"}, {"050401", "113120"}} and I
 would like to add in the second element 00 
When I try
Do[
 ID = data4[[i, 2]];
 s = Import["http://www.swift.ac.uk/xrt_curves/"; <> 00 ID, "Text"];
 Print[s],
 {i, 1,
 Length[data4]}]
This does,'t work
As well as the following:
Do[
 ID = data4[[i, 2]];
 s = Import["http://www.swift.ac.uk/xrt_curves/"; <> "00" ID, "Text"];
 Print[s],
 {i, 1,
 Length[data4]}]

As well as this again
Do[
 ID = data4[[i, 2]];
 s = Import["http://www.swift.ac.uk/xrt_curves/"; <> "00ID", "Text"];
 Print[s],
 {i, 1, Length[data4]}]

Is it a problem of the position of " " or something else?

Thanks a lot,
regards,
Maria

--- Sab
 25/2/12, Hans Michel <hmichel at cox.net> ha scritto:

Da: Hans Michel <hmichel at cox.net>
Oggetto: RE: Importing data from the web
A: "'maria giovanna dainotti'" <mariagiovannadainotti at yahoo.it>, mathgroup at smc.vnet.net
Data: Sabato 25 febbraio 2012, 16:52


Maria:

Try

data4 = {{"050318", "00111529"}, {"050401", "00113120"}};
 Do[
 ID = data4[[i, 2]];
 url = "http://www.swift.ac.uk/xrt_curves/"; <> ID ;
 s = Import[url, "Text"];
 Print[s],
 {i, 1, Length[data4]}
 ]

The string join you were attempting did not work. I moved the concatenation
of the url string external to the Import this way if you wish to test if the
url exist before import
 you can. Somewhere on
 MathGroup there is code to
test for existence of a URL.

Hans

-----Original Message-----
From: maria giovanna dainotti [mailto:mariagiovannadainotti at yahoo.it]
Sent: Saturday, February 25, 2012 12:55 AM
To: mathgroup at smc.vnet.net
Subject: [mg125205] Importing data from the web


Dear Math Group,

I have a problem importing the data from a web page.

data4 = {{"050318", "00111529"}, {"050401", "00113120"}}
Do[
 ID = data4[[i, 2]];
 s = Import["http://www.swift.ac.uk/xrt_curves/<>ID<>", "Text"];
 Print[s],
 {i, 1, Length[data4]}]

The error message is
$Failed

I am really grateful if you could help
 me

Best regards,
Maria


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