RapidMiner Studio: Difference between revisions
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In a few words, RapidMiner Studio is a "downloadable GUI for machine learning, data mining, text mining, predictive analytics and business analytics". It can also be used (for most purposes) in batch mode (command line mode). | In a few words, RapidMiner Studio is a "downloadable GUI for machine learning, data mining, text mining, predictive analytics and business analytics". It can also be used (for most purposes) in batch mode (command line mode). | ||
[[User:Camacab0|Camacab0]] ([[User talk:Camacab0|talk]] | [[User:Camacab0|Camacab0]] ([[User talk:Camacab0|talk]]) | ||
|field_analysis_orientation=General analysis | |field_analysis_orientation=General analysis | ||
|field_data_analysis_objective= | |field_data_analysis_objective= | ||
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First of all, it is important to say that RapidMiner Studio - and RapidMiner Server, that work with it - are a complete set of tools, rather than a more specific software. [https://rapidminer.com/ RapidMiner website] says that "RapidMiner lets you easily sort through and run more than 1500 operations". | First of all, it is important to say that RapidMiner Studio - and RapidMiner Server, that work with it - are a complete set of tools, rather than a more specific software. [https://rapidminer.com/ RapidMiner website] says that "RapidMiner lets you easily sort through and run more than 1500 operations". | ||
Because of it's complexity, i will only describe some of RapidMiner Studio's functions. However, I will show above an use example of RapidMiner Studio as a basic text miner. RapidMiner Studio's highlights are : | Because of it's complexity, i will only describe some of RapidMiner Studio's functions. However, I will show above an use example of RapidMiner Studio as a basic text miner. Then, I will show you how to use RapidMiner to extract, transform and analyze tweets. | ||
RapidMiner Studio's highlights are : | |||
* A visual - code-free - environment, so no programming needed | * A visual - code-free - environment, so no programming needed | ||
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= Use examples = | = Use examples = | ||
As we can do almost anything with RapidMiner Studio, I choosed to explore two different activities that can help you later build a text-mining and analyzing project. | |||
First, I will show you how to use RapidMiner as a basic text-mining tool. We will see how to extract, transform and analyze text from files on your computer. | |||
Secondly, I will explain how you can analyze tweets for free with RapidMiner Studio and a third-party website for Tweeter extraction (that is a premium feature of RapidMiner Studio). | |||
== Basic text mining == | == Basic text mining == | ||
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If you launch the process leaving the default value (TF-IDF), RapidMiner will present you the results in different ways. First you have two tabs, '''WordList''' and '''ExampleSet'''. | If you launch the process leaving the default value (TF-IDF), RapidMiner will present you the results in different ways. First you have two tabs, '''WordList''' and '''ExampleSet'''. | ||
Note : TF-IDF is a "short for term frequency–inverse document frequency" which is "a numerical statistic that is intended to reflect how important a word is to a document in a collection or corpus." [http://fr.wikipedia.org/wiki/TF-IDF Wikipedia] | |||
==== WordList View ==== | ==== WordList View ==== | ||
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[[File:RapidMiner_Studio_Tutorial1_I.PNG|300px|thumb|right|Fig. 7 : ExampleSet View]] | [[File:RapidMiner_Studio_Tutorial1_I.PNG|300px|thumb|right|Fig. 7 : ExampleSet View]] | ||
[[File:RapidMiner_Studio_Tutorial1_J.PNG|150px|thumb|left|Fig. 8 : Charts view types]] | [[File:RapidMiner_Studio_Tutorial1_J.PNG|150px|thumb|left|Fig. 8 : Charts view types]] | ||
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=== Tweets extraction === | === Tweets extraction === | ||
First of all you need to get your data that you want to input in RapidMiner. In our case, we need the tweets that we want to process. As said before, some third-party services allow you to extract tweets automatically from Twitter : I will present [https://zapier.com Zapier], which "''connects the web apps you use to easily move your data and automate tedious tasks''". | [[File:TweetsExtractionWithRapidminer-Figure1.png|thumbnail|right|Zapier's GoogleDrive and Twitter connection]] | ||
[[File:TweetsExtractionWithRapidminer-Figure2.png|thumbnail|right|Twitter search parameters on Zapier]] | |||
First of all you need to get your data that you want to input in RapidMiner. In our case, we need the tweets that we want to process. As said before, some third-party services allow you to extract tweets automatically from Twitter : I will present [https://zapier.com Zapier], which "''connects the web apps you use to easily move your data and automate tedious tasks''". A zap is a connexion between two services, that you can set up to automate tasks. | |||
For our task, I connected Twitter and Google Drive, and specified that I want Zapier to look for an hashtag (#edtech) and to save each tweet containing that value in a new text file, in a Google Drive folder. | |||
Once you have the relevant amount of tweets, you can save your Google Drive folder in a local place in your computer, that you will specify to RapidMiner. I got nearly 8'000 tweets in a few days. You have now your data ready to start using it with RapidMiner. | |||
=== Data transformation === | === Data transformation === | ||
After having all our tweets in a directory on the computer, we can proceed with RapidMiner. We need to make a process that will take our directory as input, and that will output data that can be analysed and visualised. The figure bellow show all my three processes that I will explained bellow. | |||
[[File:TweetsProcessingWithRapidminer-Figure3.png|thumbnail|left|RapidMiner process, containing the three sub-processes]] | |||
Let's first focus on the orange process, the '''Tweets processing''' : | |||
* First, the "module" Process documents from files, named '''Process tweets''', allow us, like in the previous tutorial, to specify a directory where text files are. We need to specify, inside this "module", which actions will be triggered. | |||
** As we want to take out from all tweets the hashtags only, we need to tell RapidMiner to '''Tokenize''' first all words (by cutting them where white spaces are). | |||
** Then we need it to '''filter the Tokens''' created to keep only the hashtags. That is done with regular expressions, that select only words starting by # symbol, and followed by letters or numbers. | |||
* When the Process Tweets "module" is finished, it outputs a WordList that can be converted to a ExampleSet by the '''Tweets->Data''' "module". That will allow us to treat this words as data and to use it later. | |||
If we look closer the '''URL processing''', it's made just as the Tweets processing. | |||
* We have a Process documents from files "module", named '''Process URL's''' that will put all files in the directory in a loop, and will execute for each of them two operations : | |||
** '''Tokenize''', explained before. | |||
** '''Filter tokens''', that will this time keep only links tweeted. We use a regular expression to keep only "words" starting by "http://". | |||
* Finally we convert this WordList in an ExampleSet again to be able to connect it to the Result output point. | |||
=== Data analysis === | === Data analysis === | ||
[[File:TweetsAnalysisWithRapidminer-Figure1.png|thumbnail|right|Figure 1 - Hashtags (sorted by "in documents" count, and alphabetically)]] | |||
Once the process showed before is complete and valid, you can test it to see if data outputed is what you were waiting for. My process gets me three ExampleSets, as i had three ouput points connected. I will present now two of these ExampleSets and talk then about the third one, the Read Excel process. | |||
[[File:TweetsAnalysisWithRapidminer-Figure2.svg|thumbnail|right|Figure 2 - Most represented hashtags in a graph (equivalent hashtags and #edchat filtered)]] | |||
'''My first process''' had as objective to show which hashtags were represented most, combined with #edtech hashtag. The "Tweets->DATA" ExampleSet show us that. You can see it in a data view (table) which can be sorted and in other ways like charts. | |||
* Figure 1 shows the data view, we can there see all hashtags and the number of documents (tweets) in which they were. | |||
* Figure 2 shows a graphic with most represented hashtags. | |||
'''My last process''', read Excel, is the easiest way I found to filter tokens depending on the "In documents" value. As some hashtags like #EdTech, #edTech, #Edtech were some of the most used hashtags, as I didn't used a case sensitive action to remove capital letters, and because de graph wasn't "viewable" due to the huge amount of different hashtags, I needed to filter my final data. I looked how to do it, and tried different ways, but didn't manage to do it. What I did is that I exported the data resulting from my "Tweets->Data" process, in a Microsoft Excel file. I then deleted all unwanted lines (equivalent hashtags and hashtags less represented) to keep only the most used hashtags. I created a process in RapidMiner that reads that file and outputs it's data : I then have filtered data, that can be showed. | |||
* The figure 2 graphic is the result of the Read Excel process. It only contains the most used hashtags, and filters the "equivalents" hashtags. It is important to say also that the most used hashtag (#edchat) has also been removed to better view of the others hashtags. | |||
Finally, '''my second process''' extracts links from the tweets, to see which kind of content could be behind the most tweeted links. | |||
=== URL analysis === | |||
[[File:TweetsAnalysisWithRapidminer-Figure3.png|thumbnail|right|URL data sorted by "In documents"]] | |||
As I said before I used RapidMiner to process my tweets and extract only the links. As I could not find a functionality in RapidMiner that allows me to ping an URL and to get it's real URL (all links in twitter are shortened with an URL Shortener) to be able, for example, to check which domains are more represented, I did it manually. | |||
I kept only the five more tweeted URL's and checked them. Here they are : | |||
* [https://twitter.com/K12Launch/status/514981047667527680/photo/1 Humour picture] about generational technology gap (Twitter.com, in 35 tweets) | |||
* [http://www.brilliant-insane.com/2014/12/9-traits-good-digital-citizens.html?utm_source=twitter.com&utm_medium=social&utm_campaign=buffer&utm_content=buffer8643a 9 traits of good digital citizens] (Brilliant-Insane.com, in 35 tweets) | |||
* [https://twitter.com/markbarnes19/status/543762746496806912/photo/1 Infography] about digital citizenship (Twitter.com, 35 tweets) | |||
* [http://www.insightsed.com/ Insightsed] which was unavailable (ressource limit is reached, in 29 tweets) on 17.12.2014 @ 15:30 UTC+1 | |||
* [http://www.edtechmagazine.com/k12/article/2014/09/5-strategies-reach-risk-students-technology 5 Strategies to Reach At-Risk Students with Technology] (EdtechMagazine.com, in 23 tweets) | |||
=== Results and comments === | |||
==== Process tweets results ==== | |||
* First, I was able to see that capital letters are taken in consideration in tweets. We choosed #edtech hashtag, but others were used like #EdTech, #Edtech or #edTech. | |||
* Secondly, '''the most used hashtag was clearly #edchat in nearly 700 tweets'''. Second was #education (132) and #ipaded (117) was third. | |||
==== Process URL results ==== | |||
* We can see that in the top 5 links, two of them target to status on Twitter with images. One is an infography about digital citizenship, and the other one is a funny picture. | |||
* We can see that the three other links are website articles about subjects between education and technology, what our hashtag is used for. | |||
==== Comments ==== | |||
This process has the main objective of showing how we work with data in RapidMiner. Of course I only explored a very small amount of it's functionalities and strengths. I think that the process that processes tweets could be much better : it could analyse hashtags that are together in a tweet, could analyse how many hashtags are used, on average, in every tweet. I could also cross the hashtags represented in #edtech tweets with the ones represented in #edchat tweets for example. | |||
As said before, the process treating links could be more automatised : it could resolve "real domains" automatically, and we would be able then to count or mesure which articles or even domain names (websites) are more represented. | |||
Finally, it was sometimes pleasant to work with RapidMiner, sometimes not. It's own structure is kind of easy to understand and use once you understand it, and the visual input-output points, the inclusive documentation that gives you information about the data that can enter and exit a "module" help a lot when you're beginning. Rapidminer also allow to do use full version of the software, for a limited time, which is very positive. | |||
Unfortunately some actions are not easy to find (as the Zoom out action, that only can be accessed clicking on a graph with the mouse and dragging the mouse upper-left), and it's kind of difficult to navigate in the build-in "modules" and find the one you need for an operation. | |||
= Links = | = Links = | ||
