/ 
Hypatia-0.021
River stage one • 1 direct dependent • 1 total dependent
/ Hypatia::Base

NAME

Hypatia::Base - An Abstract Base Class

VERSION

version 0.021

ATTRIBUTES

dbi

If the data source is from DBI, then this attribute contains the information necessary to connect to the database (dsn,username, and password) along with the source of the data within the database (query or table). This hash reference is passed directly into a Hypatia::DBI object. Note that if a connection is successful, the resulting database handle is passed into a dbh attribute. See Hypatia::DBI for more information.

columns

This is a hash reference whose keys represent the column types (often x and y) and the values of which represent column names from the data that correspond to the given column type.

input_data

If your data source isn't from a database, then you can store your own data in this attribute. The requirements will vary depending on subclass.

columns

This is a hash reference that assigns a sub-class dependent column type (e.g. x or y) to one or more columns. For example,

columns=>{
	x=>"time_of_day",
	y=>"num_widget_sales"
}

could be used in a line graph to indicate that the "time_of_day" column goes on the x-axis and the "num_widget_sales" column goes on the y-axis. On the other hand, for a bubble chart, you might have

columns=>{
	x=>"total_units_sold",
	y=>["pct_growth_over_last_year","pct_growth_over_last_month"],
	size=>["pct_yearly_revenue","pct_monthly_revenue"]
}

to indicate a bubble chart with two sets of y values each having two different columns to indicate size, and all with a single set of x values.

Note: The exact requirements of this attribute will vary depending on which sub-class you're calling. Consult the relevant documentation.

AUTHOR

Jack Maney <jack@jackmaney.com>

COPYRIGHT AND LICENSE

This software is copyright (c) 2012 by Jack Maney.

This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.