# Analyzing product information¶

To analyze product information of a dataset, dataset command provides the following subcommands.

The basic usage of this command is

$dataset <dataset-specifier> <dataset-parameters> product <subcommand> where the dataset-specifier is a name of the dataset to be analyzed. It is depended on which libraries you have installed and dataset -h returns a list of available dataset names. dataset-parameters are optional arguments specified with --dataset-param flag. The --dataset-param flag takes a string which connecting key and value with a single =. The --dataset-param flag can be given multi-times. You can find what kinds of parameter keys are defined in the dataset you want to use from documents of function load defined in the dataset. For example, dataset file means loading a dataset from a file, of which each line contains a review in the JSON format. To load such dataset, use file as the dataset-specifier and give the file path as a dataset-parameter with file key, i.e. --dataset-param file="path/to/file". The other datasets the Review Graph Mining project provides are: All packages are available on PyPI and you can install them by pip install. ## average¶ average subcommand outputs the average rating score of each product. The output is formatted in a JSON format such as { "product_id": <Product ID>, "summary": <Average rating score> } The usage is$ dataset <dataset-specifier> <dataset-parameters> product average

This command receives --csv flag, and if it is set, the output will be formatted in a simple CSV format.

## distinct¶

distinct subcommand outputs the distinct product IDs in a chosen dataset. In the output, each line has one product ID.

The usage is

$dataset <dataset-specifier> <dataset-parameters> product distinct ## filter¶ filter subcommand takes a set of product IDs and outputs reviews posted to the set of products. The output format is as same as the JSON format, i.e. each line has a JSON object such as { "member_id": <Reviewer ID>, "product_id": <Product ID>, "rating": <Rating score>, "date": <Date the review posted> } The usage is$ dataset <dataset-specifier> <dataset-parameters> product filter <file>

The specified file consists of product IDs and each line has one ID.

This command receives --csv flag, and if it is set, the output will be formatted in a simple CSV format.

## variance¶

variance subcommand outputs the variance of rating scores of each product.

Each line of the output is formatted as a JSON format such as

{
"product_id": <Product ID>,
"size": <number of reviews>,
"variance": <variance of reviews>
}

This command also receives --csv flag and --target <file> option.

If --csv is set, the output will be formatted in a simple CSV format. If target is supplied, only products of which ID is in the target will be outputted. The specified file consists of product IDs and each line has one ID.