comp.lang.idl-pvwave archive: archive

Home » Public Forums » archive » Help

Show: Today's Messages :: Show Polls :: Message Navigator
E-mail to friend

Re: Reading ASCII files as structure: Help [message #92029 is a reply to message #92016]

Thu, 01 October 2015 19:25

penteado
Messages: 866
Registered: February 2018

Senior Member
Administrator

On Wednesday, September 30, 2015 at 11:15:18 PM UTC-3, Lim wrote:
> However the program stop in ReadF, lun, data with the meassages:
> % READF: End of file encountered. Unit: 100
> Execution halted at: mydataASCII 11
>
> could someone show me what i am doing wrong?.

It sounds like the problem happens because you have 3 fields that are strings, and readf is reading them without an explicit format. By default, readf will read a string up to the end of the line. If you do not supply a format, it has no way of knowing at which character the fields datei and datef end, so it reads datei to the end of the line, then will read datef from the next line. You can check to see if that is the case by printing the values of your data array, to see how it was filled up by readf up to the point the program stopped (because it hit the end of the file).

You have to either give readf an explicit format, or read the lines, split them and give each field the proper value. If you have a recent version of my library (pp_lib, http://ppenteado.net/idl/pp_lib/doc/index.html), you can read it just with:

data=pp_parsetext('mydata.dat',nheader=0,delimiter=', ',/as_struct,fieldnames=['var1','var2','var3','datei','datef ','cnt'])

When I do that with your example data, I get:

IDL> data
[
{
"VAR1": 456.33999999999997,
"VAR2": 23.981999999999999,
"VAR3": 4.7999999999999998,
"DATEI": "9/10/2012",
"DATEF": "9/15/2012",
"CNT": "Brazil"
},
{
"VAR1": 3491.3299999999999,
"VAR2": 10003.100000000000,
"VAR3": 10.000000000000000,
"DATEI": "8/10/2014",
"DATEF": "10/10/2014",
"CNT": "USA"
},
{
"VAR1": 333.19999999999999,
"VAR2": 1.3000000000000000,
"VAR3": 100.20000000000000,
"DATEI": "5/5/2010",
"DATEF": "8/20/2010",
"CNT": "USA"
},
{
"VAR1": 1211.8399999999999,
"VAR2": 22.399999999999999,
"VAR3": 82.200000000000003,
"DATEI": "10/15/2014",
"DATEF": "10/20/2014",
"CNT": "UK"
}
]

Report message to a moderator

[Message index]

		Help By: psumartoira on Fri, 02 February 1996 00:00
		Re: Help By: Vapuser on Wed, 26 May 1999 00:00
		Re: Help By: R.Bauer on Tue, 25 May 1999 00:00
		Re: Help By: Pavel Romashkin on Fri, 21 May 1999 00:00
		Re: Help By: Martin Schultz on Fri, 21 May 1999 00:00
		Reading ASCII files as structure: Help By: limiqt on Wed, 30 September 2015 19:15
		Re: Reading ASCII files as structure: Help By: penteado on Thu, 01 October 2015 19:25

Previous Topic:	Point data
Next Topic:	JOIN POINTS IN A PLOT

-=] Back to Top [=-

[ Syndicate this forum (XML) ] [

] [

]

Current Time: Wed Oct 08 17:06:35 PDT 2025

Total time taken to generate the page: 0.00399 seconds