Trending questions in Data Science

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Using group by on multiple columns

I recognize the purpose of GROUP BY ...READ MORE

Sep 2 in Data Science by Kithuzzz
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Finding duplicate rows in SQL Server

I have a SQL Server data set ...READ MORE

Aug 13 in Data Science by Kithuzzz
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58 views
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How to read a csv-file from an url in R?

I'm not very experienced with R, so ...READ MORE

Jul 22 in Data Science by avinash
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100 views
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R: Generate Random Numbers with "floor" and "runif"

The R programming language is what I'm ...READ MORE

Jul 22 in Data Science by avinash
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97 views
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The difference of na.rm and na.omit in R

I've just started with R and I've ...READ MORE

Jul 22 in Data Science by avinash
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78 views
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Forecast Package from R in Python

The greatest tool for time series analysis ...READ MORE

Jul 22 in Data Science by avinash
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77 views
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How to plot two histograms together in R?

I have two data frames, one each ...READ MORE

Jul 22 in Data Science by avinash
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62 views
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What does R assume regarding order in paired t-test?

I'm assuming that the data are assumed ...READ MORE

Jul 22 in Data Science by avinash
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40 views
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Data frames and is.nan()

I was using sum(is.na(my.df)) to check whether ...READ MORE

Jul 22 in Data Science by avinash
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How to use plotly in R shiny

I'm attempting to add a graph to ...READ MORE

Jul 20 in Data Science by avinash
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Understanding of minbucket function in CART model using R

Let's say that the training data is ...READ MORE

Jul 20 in Data Science by avinash
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R command for setting working directory to source file location in Rstudio

I am working out some tutorials in ...READ MORE

Jul 20 in Data Science by avinash
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41 views
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Plot a legend outside of the plotting area in base graphics?

I've only recently started using RStudio to ...READ MORE

Jul 20 in Data Science by avinash
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31 views
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Data frames and is.nan()

Sum(is.na(my.df)) worked as predicted when I used ...READ MORE

Jul 20 in Data Science by avinash
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29 views
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sample function in R

I've only recently started using RStudio to ...READ MORE

Jul 20 in Data Science by avinash
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28 views
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Frequency table in R

I'm having trouble with something that ought ...READ MORE

Jul 9 in Data Science by avinash
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NA while using strptime function

Version 1.0.136 of R Studio for Windows ...READ MORE

Jul 9 in Data Science by avinash
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49 views
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How to deal with NaN values in R?

Due of my inexperience with programming and ...READ MORE

Jul 9 in Data Science by avinash
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43 views
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passing function argument to dplyr select

I can do this to pick out ...READ MORE

Jul 9 in Data Science by avinash
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43 views
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Difference between ls() and objects()

What distinguishes the ls() and objects() functions? The ...READ MORE

Jul 9 in Data Science by avinash
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41 views
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How does cut with breaks work in R

I've tried using?cut but haven't been able ...READ MORE

Jul 9 in Data Science by avinash
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38 views
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Read an Excel file directly from a R script

How do I open an Excel file ...READ MORE

Jul 9 in Data Science by avinash
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30 views
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How to manually find the minors of a matrix in R programming?

I have to write a function that ...READ MORE

Jul 5 in Data Science by avinash
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95 views
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Understanding `scale` in R

I'm attempting to comprehend R's definition of ...READ MORE

Jul 6 in Data Science by avinash
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30 views
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Explicitly calling return in a function or not

A while back, Simon Urbanek from the ...READ MORE

Jul 6 in Data Science by avinash
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27 views
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How does cut with breaks work in R

I've tried using?cut but haven't been able ...READ MORE

Jul 6 in Data Science by avinash
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25 views
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What is the difference between rm() and rm(list=ls())?

The majority of items I've read. They ...READ MORE

Jul 5 in Data Science by avinash
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63 views
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Fibonacci Sequence in R

Due of my inexperience with programming and ...READ MORE

Jul 5 in Data Science by avinash
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51 views
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Getting "NA" when I run a standard deviation

a quick query I read the variable ...READ MORE

Jul 5 in Data Science by avinash
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49 views
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Creating an R dataframe row-by-row

In RStudio, if I execute this code: "1 ...READ MORE

Jul 5 in Data Science by avinash
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37 views
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How do I get a list of built-in data sets in R?

Please advise on how to obtain the ...READ MORE

Jul 5 in Data Science by avinash
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35 views
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In R, how to get an object's name after it is sent to a function?

I'm trying to find the opposite of ...READ MORE

Jul 5 in Data Science by avinash
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31 views
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Get row and column indices of matches using `which()`

Say I have some matrix, for example: m ...READ MORE

Jul 5 in Data Science by avinash
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31 views
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R console output only shows most recent command in "if" condition

In RStudio, if I execute this code: "1 ...READ MORE

Jul 5 in Data Science by avinash
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25 views
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Standard Deviation in R Seems to be Returning the Wrong Answer - Am I Doing Something Wrong?

An easy illustration of standard deviation calculation: The ...READ MORE

Jun 30 in Data Science by avinash
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48 views
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Why 'nrow()' function doesn't seem to work within 'summarise()' function?

See the code below: library(dslabs) \sdata(gapminder) gapminder percent > ...READ MORE

Jun 30 in Data Science by avinash
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43 views
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1 answer

grepl in R to find matches to any of a list of character strings

Inside of a grepl regular expression, you ...READ MORE

Jun 24 in Data Science by Sohail
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234 views
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Load csv file in R

Is it possible to import a csv ...READ MORE

Jun 27 in Data Science by avinash
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47 views
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1 answer

What's the difference between "*" and "+" in lm() in R?

Lm is a fitting method for linear ...READ MORE

Jun 24 in Data Science by Sohail
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107 views
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Calculate correlation with cor(), only for numerical columns

I have a dataframe and would like ...READ MORE

Jun 24 in Data Science by Sohail
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55 views
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1 answer

Unexpected behavior for setdiff() function in R

Asymmetric difference is provided by 18 setdiff. ...READ MORE

Jun 24 in Data Science by Sohail
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54 views
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Stepwise AIC using forward selection in R

In R, I'm attempting to perform a ...READ MORE

Jun 24 in Data Science by Sohail
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43 views
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To speed up the tapply function in R, or another function to convert data frame into a matrix

I must turn a sizable dataset into ...READ MORE

Jun 24 in Data Science by Sohail
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44 views
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Import CSV file using R

If there are quotes ("), by using ...READ MORE

Jun 24 in Data Science by Sohail
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100 views
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understanding durbin-watson test in R

I believe I have a misconception about ...READ MORE

Jun 24 in Data Science by Sohail
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34 views
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Create a sequence of sequences of numbers

The following sequence should be created in ...READ MORE

Jun 24 in Data Science by Avinash
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24 views
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Using dcast to widen a data frame

> dcast(z, id ~ item, value.var="freq") ...READ MORE

Jun 24 in Data Science by Sohail
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55 views
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1 answer

How to implement Knn-algorithm without using k-nn function in r?

I created an example that demonstrates the ...READ MORE

Jun 24 in Data Science by Sohail
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47 views
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1 answer

Problem with sample function in R

The first time works, but after that, ...READ MORE

Jun 24 in Data Science by Sohail
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46 views
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1 answer

unique() for more than one variable

df <- data.frame(yad = c("BARBIE", "BARBIE", "BAKUGAN", ...READ MORE

Jun 24 in Data Science by Sohail
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35 views