From: "Dan Webb [dbw]" <dbw@...>
Date: 2009-03-11T18:16:57+09:00
Subject: Re: FasterCSV, Gruff and Large Data Import

Hi again,

As suggested I've changed tact. It now looks like gruff doesn't like the
array created by FasterCSV, but I don't know why!

If I create an array manually then feed it into gruff, i.e. 

a = [1,2,3,4,5]
g.data("X", a)

it works absolutely fine. However if I've put the same data into a csv
file, then read it in using either: 

a = fastercsv.read("r.csv")

or 

FasterCSV.foreach("r.csv") do |row| 
	a << row
end

If I puts all three they all print out as
1
2
3
4
5

And both errors given by the array when I use fasterCSV are:

c:/ruby/lib/ruby/gems/1.8/gems/gruff-0.3.4/lib/gruff/base.rb:943:in
`larger_than
_max?': undefined method `>' for ["1", "2", "3", "4", "5"]:Array
(NoMethodError)

        from
c:/ruby/lib/ruby/gems/1.8/gems/gruff-0.3.4/lib/gruff/base.rb:453:in
 `data'
        from
c:/ruby/lib/ruby/gems/1.8/gems/fastercsv-1.4.0/lib/faster_csv.rb:15
70:in `each_with_index'
        from
c:/ruby/lib/ruby/gems/1.8/gems/gruff-0.3.4/lib/gruff/base.rb:443:in
 `each'
        from
c:/ruby/lib/ruby/gems/1.8/gems/gruff-0.3.4/lib/gruff/base.rb:443:in
 `each_with_index'
        from
c:/ruby/lib/ruby/gems/1.8/gems/gruff-0.3.4/lib/gruff/base.rb:443:in
 `data'
        from main.rb:27

am I missing something spectacular?
Thanks,
Dan

-----Original Message-----
From: James Gray [mailto:james@grayproductions.net] 
Sent: 10 March 2009 15:06
To: ruby-talk ML
Subject: Re: FasterCSV, Gruff and Large Data Import

On Mar 10, 2009, at 9:57 AM, Dan Webb [dbw] wrote:

> On a second look the error I'm getting is a gruff related one.
>
> c:/ruby/lib/ruby/gems/1.8/gems/gruff-0.3.4/lib/gruff/base.rb:943:in
> `larger_than
> _max?': undefined method `>' for ["1\t8877"]:Array (NoMethodError)
>        from

Gruff expects an Array of values to graph.  It looks like you might be  
feeding it an Array of Arrays and even those values look fishy.

I recommend simplifying the problem.  First, try just reading the  
first five lines of your data file and graphing just that.

When you have that working, you can expand the data and see how things  
go.

James Edward Gray II