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Questions tagged [mining]

235 questions
31
votes
4 answers

PBFT algorithm in hyperledger

Can anyone explain PBFT Algorithm in detail without giving any link for the same? And how it works in hyperledger. So, once the transaction is sent to the blockchain: Who validates the transaction? How the consensus is achieved on the…
Saurabh
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14
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3 answers

Converting a Document Term Matrix into a Matrix with lots of data causes overflow

Let's do some Text Mining Here I stand with a document term matrix (from the tm Package) dtm <- TermDocumentMatrix( myCorpus, control = list( weight = weightTfIdf, tolower=TRUE, removeNumbers = TRUE, …
Captain Cook
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7
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3 answers

algorithm to calculate similarity between texts

I am trying to score similarity between posts from social networks, but didn't find any good algorithms for that, thoughts? I just tried Levenshtein, JaroWinkler, and others, but those one are more used to compare texts without sentiments. In posts…
user430830
4
votes
6 answers

Remove all punctuation from string, except if it's between digits

I have a text that contains words and numbers. I'll give a representative example of the text: string = "This is a 1example of the text. But, it only is 2.5 percent of all data" I'd like to convert it to something like: "This is a 1 example of…
deltascience
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4
votes
2 answers

Stop mining on private net on geth ethrereum

I have started a geth client using the below client(I had already created two accounts.: geth --datadir datadir --networkid 123 --rpc --rpcaddr="localhost" --rpccorsdomain="*" --unlock --minerthreads="1" --maxpeers=0 --mine console I…
Lakshmi
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4
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1 answer

Mining/Crawling/ the web console with phantomjs or something else?

I am wanting to create an application whose behavior is directly related to that of another web application. Essentially, there is an application that runs within Gmail that dynamically interacts with the the interface based on the actions of the…
Dnaught14
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3
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2 answers

Are there any open source solutions for mining bitcoins using WebAssembly?

I'm a little late to the game, but I just learned about Web Assembly and am considering using this to mine bitcoin instead of serving ads (which tend to expose a user's identity/data). I have never mined bitcoin and haven't learned Web Assembly…
pcalkins
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3
votes
1 answer

Frequent pattern mining in Python

I want to know how to get the absolute support and relative support of itemsets in python. Presently I have the following: import pandas as pd import pyfpgrowth from mlxtend.preprocessing import TransactionEncoder from mlxtend.frequent_patterns…
olu
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3
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1 answer

geth --targetgaslimit not working?

My contract creation requires 5633321 gas - more than default block gas limit. I was able to deploy on Ropsten network it few times ago: https://ropsten.etherscan.io/tx/0xe90e8920018f8b633620c731c68b63f3ce11dc19f59ddb49401c9e2c9cd1f8c2. Now i want…
4ntoine
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3
votes
1 answer

Share an object (blockchain) on a network

I created a simple "blockchain" on Java. Blockchain class is an ArrayList<> of Blocks. The blocks are made by: hashcode, previous hashcode and nonse counter. When a block is created, it is added to the blockchain but, until the algorithm (SHA256) is…
Bugpirasi
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3
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0 answers

Text mining for specific key words in R

I am using a code piece that produces the histogram/frequency of words in a .txt file converted into corpus, but I want to search for specific key words and plot their frequency...The following code after loading the required packages, loads the…
Mohsin
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3
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1 answer

What does 'mining' means in smart contract ?

I just would like to check my understanding. In Bitcoin platform, the miner who does the following: - verify each unconfirmed transaction. - group them in a block - hash the block and find the nonce ( proof of work ) Now, in Ethereum platform,…
sheemar
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3
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2 answers

Techniques to display related content or articles

I've been trying to learn Text mining and other related things in Collective Intelligence field. I am interested to make an app which will scan thru the document and show related posts/articles on page. What algorithm(s) would be helpful to retrieve…
Volatil3
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3
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0 answers

in-line ASM addressing in OSX

I am getting this issue compiling on osx fatal error: error in backend: 32-bit absolute addressing is not supported in 64-bit mode by this line of code in inline-ASM: movq grsoT0(,%%rdi,8), %%mm1 OSX does not allow me to define absolute…
Vito
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3
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1 answer

Web mining -classification algorithms

my senior project is determining the dominant category of a web page.I crawled dmoz. now i am trying to build arff. After that i will use some feature extraction methods and classification algorithms. Do you know which feature extraction method…
user252407
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