Trending questions in Data Analytics

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1 answer

R plot arima fitted model with the original series

This question has many ways to answer, ...READ MORE

May 19, 2018 in Data Analytics by DataKing99
 • 8,250 points • 4,561 views
0 votes
2 answers

In data frame how to spilt strings into values?

You can do this using dplyr and ...READ MORE

Dec 5, 2018 in Data Analytics by Kalgi
 • 52,350 points • 1,146 views
+1 vote
1 answer

How do I perform feature selection in a disease prediction data set?

Feature selection is based equally upon logic ...READ MORE

Aug 20, 2018 in Data Analytics by Abhi
 • 3,720 points • 865 views
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1 answer

How to cluster a very large dataset in R?

You can initially use kmeans, to calculate ...READ MORE

Jun 19, 2018 in Data Analytics by Sahiti
 • 6,370 points • 3,062 views
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2 answers

Transforming a key/value string into distinct rows in R

We would start off by loading the ...READ MORE

Mar 26, 2018 in Data Analytics by Bharani
 • 4,660 points • 1,239 views
0 votes
2 answers

Integration of R with Java

there is a package called rjava that ...READ MORE

Dec 5, 2018 in Data Analytics by Kalgi
 • 52,350 points • 995 views
0 votes
1 answer

Showing percentage instead of counts in a bar plot - ggplot2 - R

Load the 'scales' package first, which gives ...READ MORE

May 29, 2018 in Data Analytics by Bharani
 • 4,660 points • 3,895 views
0 votes
1 answer

Join multiple strings in R

Joining strings in R is quite an ...READ MORE

Jul 19, 2018 in Data Analytics by DataKing99
 • 8,250 points • 1,634 views
+1 vote
1 answer

Difference between validation set and a test set

Validation set can be considered as a part ...READ MORE

Jul 24, 2018 in Data Analytics by CodingByHeart77
 • 3,750 points • 1,389 views
+1 vote
1 answer

How good at SQL does a data scientist really need to be?

SQL is a standardized query language for requesting information ...READ MORE

Aug 9, 2018 in Data Analytics by Abhi
 • 3,720 points • 653 views
0 votes
1 answer

How can I calculate mean per group in a data.frame?

You can use aggregate function for calculating ...READ MORE

May 24, 2018 in Data Analytics by zombie
 • 3,790 points • 3,980 views
0 votes
1 answer

Can a data scientist do everything a data analyst can do?

Technically speaking, yes and no. Yes from ...READ MORE

Aug 9, 2018 in Data Analytics by Abhi
 • 3,720 points • 668 views
0 votes
1 answer

On a given dataset would time taken to train n - random forest be equal to time taken to train n X (Decision tree)

No, the time to train the random ...READ MORE

Jul 24, 2018 in Data Analytics by Abhi
 • 3,720 points • 1,309 views
0 votes
1 answer

What is data science?

Data Science is the practice of: Asking questions (formulating hypothesis), ...READ MORE

Aug 3, 2018 in Data Analytics by Abhi
 • 3,720 points • 903 views
0 votes
1 answer

Steps to evaluate Linear Regression in R

 These are sequential steps which need to ...READ MORE

Jul 25, 2018 in Data Analytics by CodingByHeart77
 • 3,750 points • 1,238 views
0 votes
1 answer

Logistic Regression Example

Logistic Regression often referred to as the ...READ MORE

Jul 19, 2018 in Data Analytics by CodingByHeart77
 • 3,750 points • 1,521 views
0 votes
1 answer

How to drop factor levels in a subsetted data frame?

You can use factor(ff) to drop levels ...READ MORE

Apr 17, 2018 in Data Analytics by kappa3010
 • 2,090 points
edited Apr 17, 2018 by kappa3010 • 5,450 views
0 votes
1 answer

Load CSV File in R

Loading a .csv file in R is ...READ MORE

Jul 28, 2018 in Data Analytics by Sahiti
 • 6,370 points • 1,034 views
0 votes
1 answer

How to save a DataFrame in R??

Suppose your DataFrame is named as df: write.csv(df,file="exmp.csv") Then ...READ MORE

Apr 20, 2018 in Data Analytics by DeepCoder786
 • 1,720 points • 5,214 views
0 votes
1 answer

Would time taken to train n-random forest be equal to n x (decision trees)

No, the time to train the random ...READ MORE

Aug 7, 2018 in Data Analytics by Abhi
 • 3,720 points • 798 views
0 votes
1 answer

How to export a graph to .eps file with R?

The easiest way that I could suggest ...READ MORE

Apr 27, 2018 in Data Analytics by Sahiti
 • 6,370 points • 4,885 views
0 votes
1 answer

How to build a Scatter-plot using plotly?

With the help of “plotly” we can ...READ MORE

Jul 6, 2018 in Data Analytics by CodingByHeart77
 • 3,750 points • 1,796 views
0 votes
2 answers

PCA model in R

Principal component analysis (PCA) is routinely employed on ...READ MORE

Jul 19, 2018 in Data Analytics by zombie
 • 3,790 points • 1,231 views
0 votes
1 answer

Reshape data from long to wide format in R

Use reshape function: reshape(dat1, idvar = "name", timevar = ...READ MORE

Jun 14, 2018 in Data Analytics by CodingByHeart77
 • 3,750 points • 2,759 views
0 votes
1 answer

How do I become a data scientist step by step?

I am assuming that you are a ...READ MORE

Jul 26, 2018 in Data Analytics by Abhi
 • 3,720 points • 788 views
0 votes
1 answer

Plot two variables as lines on the same graph using ggplot

If you have small number of variables, ...READ MORE

Apr 17, 2018 in Data Analytics by kappa3010
 • 2,090 points • 5,078 views
0 votes
1 answer

Components in grammar of graphics

Broadly speaking these are different components in grammar of ...READ MORE

Jul 24, 2018 in Data Analytics by Sahiti
 • 6,370 points • 830 views
0 votes
1 answer

Remove messages from R markdown report

All you have to do is, set ...READ MORE

May 14, 2018 in Data Analytics by Bharani
 • 4,660 points • 3,821 views
0 votes
1 answer

Finding frequency of observations in R

You can use the "dplyr" package to ...READ MORE

Mar 26, 2018 in Data Analytics by Bharani
 • 4,660 points • 5,923 views
0 votes
1 answer

How to calculate group mean and assign it to new data in R

You can use something like this: df$grp.mean.values <- ...READ MORE

Jun 27, 2018 in Data Analytics by Sahiti
 • 6,370 points • 1,913 views
0 votes
2 answers

What is difference between Distributed search head and Search head cluster?

 A distributed environment describes the separation of ...READ MORE

Dec 4, 2018 in Data Analytics by Ali
 • 11,360 points • 2,542 views
0 votes
1 answer

List packages are used for data mining in R?

You can refer to the following packages ...READ MORE

Jul 3, 2018 in Data Analytics by DataKing99
 • 8,250 points • 1,613 views
0 votes
1 answer

Data Imputation Packages

These are some packages in R which ...READ MORE

Jul 28, 2018 in Data Analytics by Sahiti
 • 6,370 points • 556 views
+1 vote
1 answer

How to handle Nominal Data?

Nominal data is basically data which can ...READ MORE

Jul 24, 2018 in Data Analytics by Abhi
 • 3,720 points • 662 views
0 votes
1 answer

Overfitting vs Underfitting

In statistics and machine learning, one of ...READ MORE

Jul 11, 2018 in Data Analytics by CodingByHeart77
 • 3,750 points • 1,203 views
0 votes
1 answer

Catch integer(0) in R

R's way of printing a zero length ...READ MORE

Apr 27, 2018 in Data Analytics by kappa3010
 • 2,090 points • 4,402 views
0 votes
1 answer

Statistical Power of Sensitivity

Sensitivity is commonly used to validate the ...READ MORE

Jul 13, 2018 in Data Analytics by CodingByHeart77
 • 3,750 points • 1,063 views
0 votes
2 answers

Apply function in R

apply Description: “Returns a vector or array or ...READ MORE

Jul 10, 2018 in Data Analytics by zombie
 • 3,790 points • 1,107 views
0 votes
1 answer

Selection Bias

Selection bias is the bias introduced by the ...READ MORE

Jul 11, 2018 in Data Analytics by CodingByHeart77
 • 3,750 points • 1,062 views
0 votes
1 answer

How to create a new R6 Class in R?

You have to first create an object ...READ MORE

Jul 5, 2018 in Data Analytics by DataKing99
 • 8,250 points • 1,310 views
0 votes
1 answer

How to treat missing values during analysis?

The extent of the missing values is ...READ MORE

Jul 12, 2018 in Data Analytics by Sahiti
 • 6,370 points • 1,003 views
0 votes
1 answer

Confusion matrix in R

A confusion matrix can be used to ...READ MORE

Jul 5, 2018 in Data Analytics by DataKing99
 • 8,250 points • 1,248 views
0 votes
2 answers

Clustering in R

Clustering is a type of unsupervised learning ...READ MORE

Jul 9, 2018 in Data Analytics by zombie
 • 3,790 points • 1,008 views
0 votes
1 answer

White noise model in R

The white noise (WN) model is a ...READ MORE

Jul 10, 2018 in Data Analytics by Sahiti
 • 6,370 points • 999 views
0 votes
1 answer

Random Walk model in R

A random walk is a simple example ...READ MORE

Jul 10, 2018 in Data Analytics by Sahiti
 • 6,370 points • 991 views
0 votes
1 answer

Cross Validation

Cross-validation is a model validation technique for ...READ MORE

Jul 17, 2018 in Data Analytics by CodingByHeart77
 • 3,750 points • 682 views
0 votes
1 answer

How to remove all variables except functions in R?

One line that removes all objects except for functions: rm(list ...READ MORE

Apr 25, 2018 in Data Analytics by DeepCoder786
 • 1,720 points • 4,249 views
0 votes
1 answer

Multiple plots onto a single page in R

Plotting multiple plots onto a single page ...READ MORE

Jul 17, 2018 in Data Analytics by Sahiti
 • 6,370 points • 621 views
0 votes
1 answer

How to find out cluster center mean of DBSCAN in R?

Just index back into the original data ...READ MORE

Jun 27, 2018 in Data Analytics by Sahiti
 • 6,370 points • 1,495 views
0 votes
1 answer

Treat outliers in Dataset

Outlier values can be identified by using ...READ MORE

Jul 12, 2018 in Data Analytics by Sahiti
 • 6,370 points • 818 views
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