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Questions tagged [mining]

235 questions
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miner.start() returning null

I want to develop a dapp and deploy on geth. I have installed geth and mist wallet. Now, when I am starting miner.start(1) to make some ethers for account. It is showing me null and no ether is getting generated. I have geth running on 1 terminal…
UbuntuCoder
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Create User on Oracle 12c (pluggable)

I need to do Data Mining with Oracle on a Pluggable Oracle Database. The users a created with a c# prefix. If i want to install the Data Mining Repository via SQL Developer the Installation a User called "ODMRSYS" without the prefix and gives me a…
Sentes Snus
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Data Scraping with php

I want to scrape data using php. But I don't understand where im wrong. I want to receive "15,50 TL" text. Thank you
Can Korkmaz
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Geth private network problems generating ether

Short description I have three Ethereum nodes connected in a private network and I am using the interactive Javascript console with geth. The problem is, I cannot find a way to get ether on any of the accounts. The balance is always 0. Details For…
Snackoverflow
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Blockchain PoW mining data integrity logic

reference: https://www.youtube.com/watch?v=kE51N84hBxU To check a block for integrity the nonce and the content are hashed together and then it is check if the numbers of zeros do match the number of zeros of the hash of the "guy" who mined the…
user8175891
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How to extract a score from a disorganised dictionary-like data frame in pandas?

I am new to pandas and I have a data frame that looks like this: 9861:1.0 9620:1.0 9865:1.0 30260:1.0 30026:1.0 10770:1.0 10772:1.0 10771:0.5 10774:0.5 10773:0.0 9750:1.0 9755:1.0 9632:1.0 30255:1.0 30012:1.0 …
jondoff
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Ethereum: Why do I keep creating DAG files?

After reading on another question on Stack, I understood that a DAG file stands for Directed Acyclic Graph. However, I do not understand how it is used and when I typed ethminer -G, I started to see Creating DAG. XX% done DAG 16:37:39.331|ethminer …
Yohan Obadia
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Text mining by row in a data frame

I have this data frame: > str(final) 'data.frame': 112 obs. of 3 variables: $ FAO_CountryName: chr Algeria Egypt Libya Morocco ... $ FAO_CountryURL : chr "http://www.fao.org/giews/countrybrief/country.jsp?code=DZA"…
Ileeo
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Using create_matrix from RTextTools yields Error in simple_triplet_matrix(i = i, j = j

This has been asked before but in an old thread and was never addressed. People ran into this at the bottom of this thread - Finding 2 & 3 word Phrases Using R TM Package The R base code and packages are fresh installs. I could not get any bigram…
Doug C
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Hashset handling to avoid stuck in loop during iteration

I'm working on image mining project, and I used Hashset instead of array to avoid adding duplicate urls while gathering urls, I reached to the point of code to iterate the Hashset that contains the main urls and within the iteration I go and…
kingbode
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R Twitter Mining: Finding Frequency of Mentions/Hastags

I'm very new with R. I'm using it mostly for marketing purposes so the TwitteR package is very useful. What I'm trying to do is find the frequency of @mentions and #hashtags within my data after I've got all the data through the searchTwitter…
fox11sevens
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SQL: Rule Mining from an Item set

Hey mates I am trying to implement an association rule mining in a vertica db: So far I got the heavy lifting done by finding the frequent itemsets however I still need to generate the rules. Here is an example: Initial…
valenzio
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what are the android libraries for association rule mining?

I am new to data mining and confused about Association rules libraries for Android. I've found some comments about SPMF and Weka. Which libraries can be used for Apriori algorithm and association rule mining in android coding using android studio?
samira kh
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twitter mining Memory error

I am doing twitter mining where I am dealing with large amount of data .I am getting Memory error in my below code - ids_str = ','.join([str(_id) for _id in ids[:100]]) ids = ids[100:] <--------- this point has memory error . where ids…
Joe Lal
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Twitter mining issue with the rate limit

I have been working in a reseach project involving getting friends and followers info from twitter . I have written a code that works fine for sample account like mine who has 1k followers or friends . But I am having trouble running it for Donald…
Joe Lal
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