GrapheR

GNU General Public License
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GrapherR

GrapheR is a Graphical User Interface created for simple graphs.

Depends: R (>= 2.10.0), tcltk, mgcv
Description: GrapheR is a multiplatform user interface for drawing highly customizable graphs in R. It aims to be a valuable help to quickly draw publishable graphs without any knowledge of R commands. Six kinds of graphs are available: histogram, box-and-whisker plot, bar plot, pie chart, curve and scatter plot.
License: GPL-2
LazyLoad: yes
Packaged: 2011-01-24 17:47:17 UTC; Maxime
Repository: CRAN
Date/Publication: 2011-01-24 18:41:47

More information about GrapheR at CRAN
Path: /cran/newpermanent link

Advantages of using GrapheR

  • It is bi-lingual (English and French) and can import in text and csv files
  • The intention is for even non users of R, to make the simple types of Graphs.
  • The user interface is quite cleanly designed. It is thus aimed as a data visualization GUI, but for a more basic level than Deducer.
  • Easy to rename axis ,graph titles as well use sliders for changing line thickness and color

Disadvantages of using GrapheR

  • Lack of documentation or help. Especially tips on mouseover of some options should be done.
  • Some of the terms like absicca or ordinate axis may not be easily understood by a business user.
  • Default values of color are quite plain (black font on white background).
  • Can flood terminal with lots of repetitive warnings (although use of warnings() function limits it to top 50)
  • Some of axis names can be auto suggested based on which variable s being chosen for that axis.
  • Package name GrapheR refers to a graphical calculator in Mac OS – this can hinder search engine results

Using GrapheR

  • Data Input -Data Input can be customized for CSV and Text files.
  • GrapheR gives information on loaded variables (numeric versus Factors)
  • It asks you to choose the type of Graph 
  • It then asks for usual Graph Inputs (see below). Note colors can be customized (partial window). Also number of graphs per Window can be easily customized 
  • Graph is ready for publication



Trying out Google Prediction API from R

Ubuntu Login
Image via Wikipedia

So I saw the news at NY R Meetup and decided to have a go at Prediction API Package (which first started off as a blog post at

http://onertipaday.blogspot.com/2010/11/r-wrapper-for-google-prediction-api.html

1)My OS was Ubuntu 10.10 Netbook

Ubuntu has a slight glitch plus workaround for installing the RCurl package on which the Google Prediction API is dependent- you need to first install this Ubuntu package for RCurl to install libcurl4-gnutls-dev

Once you install that using Synaptic,

Simply start R

2) Install Packages rjson and Rcurl using install.packages and choosing CRAN

Since GooglePredictionAPI is not yet on CRAN

,

3) Download that package from

https://code.google.com/p/google-prediction-api-r-client/downloads/detail?name=googlepredictionapi_0.1.tar.gz&can=2&q=

You need to copy this downloaded package to your “first library ” folder

When you start R, simply run

.libPaths()[1]

and thats the folder you copy the GooglePredictionAPI package  you downloaded.

5) Now the following line works

  1. Under R prompt,
  2. > install.packages("googlepredictionapi_0.1.tar.gz", repos=NULL, type="source")

6) Uploading data to Google Storage using the GUI (rather than gs util)

Just go to https://sandbox.google.com/storage/

and thats the Google Storage manager

Notes on Training Data-

Use a csv file

The first column is the score column (like 1,0 or prediction score)

There are no headers- so delete headers from data file and move the dependent variable to the first column  (Note I used data from the kaggle contest for R package recommendation at

http://kaggle.com/R?viewtype=data )

6) The good stuff:

Once you type in the basic syntax, the first time it will ask for your Google Credentials (email and password)

It then starts showing you time elapsed for training.

Now you can disconnect and go off (actually I got disconnected by accident before coming back in a say 5 minutes so this is the part where I think this is what happened is why it happened, dont blame me, test it for yourself) –

and when you come back (hopefully before token expires)  you can see status of your request (see below)

> library(rjson)
> library(RCurl)
Loading required package: bitops
> library(googlepredictionapi)
> my.model <- PredictionApiTrain(data="gs://numtraindata/training_data")
The request for training has sent, now trying to check if training is completed
Training on numtraindata/training_data: time:2.09 seconds
Training on numtraindata/training_data: time:7.00 seconds

7)

Note I changed the format from the URL where my data is located- simply go to your Google Storage Manager and right click on the file name for link address  ( https://sandbox.google.com/storage/numtraindata/training_data.csv)

to gs://numtraindata/training_data  (that kind of helps in any syntax error)

8) From the kind of high level instructions at  https://code.google.com/p/google-prediction-api-r-client/, you could also try this on a local file

Usage

## Load googlepredictionapi and dependent libraries
library(rjson)
library(RCurl)
library(googlepredictionapi)

## Make a training call to the Prediction API against data in the Google Storage.
## Replace MYBUCKET and MYDATA with your data.
my.model <- PredictionApiTrain(data="gs://MYBUCKET/MYDATA")

## Alternatively, make a training call against training data stored locally as a CSV file.
## Replace MYPATH and MYFILE with your data.
my.model <- PredictionApiTrain(data="MYPATH/MYFILE.csv")

At the time of writing my data was still getting trained, so I will keep you posted on what happens.