From: cliveharber@...
Date: 2007-10-08T21:24:50+09:00
Subject: Re: MATRIX PROBLEMS (AGAIN!)

Hi John

Instead of this:
line.each(',') { |this_record| 
  fields << this_record.chomp(",").strip()            # read to the end of the 
file into 'fields', split into lines and chomp out the delimiter 
  mat1[r,c] = fields[r,c]                                     # the rows and 
columns in the matrix = rows and columns in fields 
  c=c+1                                                           
  n=n+1 
 if c > 19 then                                                 # loops through 
each row/column. At the end of each line where c=19, reset loop onto next row 
with col = 1 
 c = 1 
 end 
   } 
which I think is the problem,

try 

fields = eval("[" + line + "]")

this should turn the string into an array which you can iterate over - this comes from the Hal Fulton book so it should work.

HTH

Clive
---- John Nott <JNott@dto.ie> wrote: 
> Hi everyone, 
> As a complete new comer to Ruby. I have written this little piece of simple code but I have no idea why it only half works. It creates the matrix as I want it to but instead of populating it using the file as pointed to in file path, it fills it up with empty data!?
>  
> If anyone has any tips on where I may be going wrong I would really really appreciate it! I have remmed the code as best as I can throughout.
>  
>  
>  
> print "Importing Planning Sheet: 2004_extrap_Planning_Data\n"
>  
> filepath = 'Q:\\TECH2006\\DBA\\02_LU\\Final TAGM 2007 (working)\\TAGM_666_Current_FROM G_DRIVE\\2004\\2004_extrap_Planning_Data.csv'       #the file that contains teh data that i would like to put into the matrix 
>  
> 
> file = File.new(filepath, 'r')                # define new file as filepath
>  
> mat1 = OtMatrix.new(649,19)          # define new omni trans matrix 649 rows, 19 columns
>  
> fields = Array.new                          # define fields as a new array to hold data
>  
> r = 1                                            # matrix row r = first row
> n = 0                                           # n (fields) = 0
> c = 1                                           # matric column 1 = first column
>  
> while ( !file.eof )                           
>  line = file.gets
>  line.each(',') { |this_record|
>   fields << this_record.chomp(",").strip()            # read to the end of the file into 'fields', split into lines and chomp out the delimiter
>   mat1[r,c] = fields[r,c]                                     # the rows and columns in the matrix = rows and columns in fields
>   c=c+1                                                           
>   n=n+1 
>  if c > 19 then                                                 # loops through each row/column. At the end of each line where c=19, reset loop onto next row with col = 1
>  c = 1 
>  end
>    }
>   
> end
>  
> print mat1                                        
>  
>  
>  
> Thanks very much in advance!
>  
>  
> 
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