Tutorial for Sentiment Analysis on Twitter
@sarthakgirdhar wrote: Is there any tutorial to learn sentiment analysis to extract twitter data. I want to start from scratch. I have already looked at few posts on analyticsvidhya and I am still not...
View ArticleWhat is PCA and how is it different from SVD
@krikar wrote: Can you guys please explain PCA in detail with a simple example (how orthogonal components are formed , Covariance Matrix). The analytical workflow after PCA. Like if I have to do...
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Counting unique combination of columns in a data frame for each country
@Ashis wrote: Hi, below is my data frame... I want to count the medals for each country (denoted in NOC column)..Since there are team events (here every row corresponds to one athlete) i have to count...
View ArticlePost Graduate Programme in Business Analytics - Great Lakes or Bridge Institute?
@joshij wrote: Hello Kunal, I am looking for a Post graduate programme in Business Analytics.However is confused between the Great Lakes PGPBA and Bridge School of Management's- PREDICTIVE BUSINESS...
View ArticleUnable to update conda packages behind corporate firewall. Updated .condarc...
@poPYtheSailor wrote: I am behind a corporate firewall. I am trying to update the conda packages by running : conda update --all This is aking me for proxy user name and password. https proxy...
View ArticleHow to use missForest packaage in the test data set?
@Tapojyoti_Paul wrote: We can basically use missForest package for imputing missing values in R(for both categorical and numeric).But this approach requires a complete response variable for training...
View ArticleInterpreting the poisson regression output when the input dataset is normalized
@Ashis wrote: How to interpret the poisson regression output when the input dataset is normalized? Also how to get the predicted output values of the Dependent variable? ThanksAshis Posts: 1...
View ArticleFraud predictive model
@Pallavi1 wrote: Hi,I would like to build a fraud predictive model for Financial services(fraud rate -approx.0.1%) to predict which business entity will have fraud in next 24 hrs. I have 100 million...
View ArticleSeeking help from experts in Fraud predictive models
@Pallavi1 wrote: Hi, I would like to discuss a few questions on fraud predictive models. If you have developed Fraud predictive models, can we discuss a few problems i am facing. Due to data...
View ArticleMeaning about idioms in data science
@harshitgarg wrote: What does the phrase "Data matures like wine, applications like fish" mean? Posts: 1 Participants: 1 Read full topic
View ArticlePattern matching, Text Mining
@sivaprasadadiraju wrote: Hello, Here is my problem statement. on huge number of records input - JOHN C/O ABEGE LOT 45 BLK 39 41547 Nonpareil Dr Palmdale, CA 93551-2802 Need to extract multiple values...
View ArticleHow to normalize the dataset with many missing values?
@Ashis wrote: Is there any method or package which ll help me in normalizing the data with many missing values(NA).. data set is in follwing format. GDP FDI net_incomecountry1...
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Solution checker is not working Please help!
@Swapnil_Sharma wrote: I am getting this error for last 1 hour.Please check Pasted image1920x1080 228 KB Posts: 2 Participants: 2 Read full topic
View ArticleBlack Friday Data Hack - Reveal your approach
@kunal wrote: Dear all, Thanks for your participation in this exciting hackathon. The learning on a dataset like this can not be complete until you share and discuss your approach. So, let's do that!...
View ArticleHow decision tree performs non-linear classification?
@harry wrote: I am currently studying about unsupervised machine learning algorithms like 1-SVM2- decision tree In SVM we could perform non-linear classification using kernel method .I want to know...
View ArticleWhich Platform( Windows or Linux ) is used by most R programmers for Rstudio
@shriram_nerkar wrote: Hi All, On which platform (Windows or Linux) most of the Data Analyst or Data Scientist run R Studio ? Which Platform (Windows or Linux) is used by most of the Data Analytics or...
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How to train a model when train set and test contain different levels for a...
@pagal_guy wrote: Hello, While trying to a problem on classification I came across a curious case:The column has some levels in the train data,but the test data has some extra levels for that column...
View ArticleDataSet: Black Friday
@Sunil wrote: train.zip (5.5 MB) test.zip (2.0 MB) Posts: 1 Participants: 1 Read full topic
View ArticlePractice Problem 1 - why grouping as class Others not done for all variables?
@ajayram198 wrote: I have a doubt in Practice Problem 1 in the Datahack section http://datahack.analyticsvidhya.com/contest/practice-problem-1. in this problem there is a tutorial solution given in...
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How to decide which type of kernel to use in SVM
@pagal_guy wrote: hello, While trying to implement SVM in R I noticed that with the linear kernel the accuracy was about 84% and with the rbf kernel it went upto 93% but when I used the sigmoid kernel...
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