115 Answered Questions for the topic R

11/16/22

Application of Natural Language Processing (NLP) on Social Media

I have worked a lot of social media companies in gaining insight from their own data. Said data usually comes in the form of text and therefore requires application of Natural Language Processing... more

Which of the following geom_ functions are appropriate for adding a layer to a ggplot2 object to visualise the relationships between numeric variables?

Which of the following geom_ functions are appropriate for adding a layer to a ggplot2 object to visualise the relationships between numeric variables? There may be more than one correct... more

Which of the following geom_ functions are appropriate for adding a layer to a ggplot2 object to visualise the relationships between numeric variables?

Which of the following geom_ functions are appropriate for adding a layer to a ggplot2 object to visualise the relationships between numeric variables? There may be more than one correct... more

please can you check my answers to these questions regarding RStudio?

Which of the following must be part of each layer in a ggplot2 object? There may be more than one correct answer. limits grouping variable(s) facet tick aesthetic... more

Predicting Values for a logarithmic equation in R

I am attempting to understand how to predict expected changes to earnings in R. We are using a dataset from the "Current Population Survey" using the variables average hourly earnings (ahe), age... more

Using R script functions generate random samples and calculate sample means. Be sure to solve all 3 parts of this problem.

Please show the R script coding/steps to solve this. Please do all 3 parts of this question!!! Thanks in advance!!! :)Assume that we have a normal population with a mean of 10 and a variance of 22,... more

Using R Script please show the coding/steps to find the 95% confidence interval for the mean change in percent return to investors.

Thanks in advance!!! Please show all work/ coding in R Script, so I can try to understand how to solve problems like this later on.Fortune magazine (March 1997) reported the total returns to... more

04/07/21

Multivariate regression R output not displaying coefficient values for each variable in the model

When I run the summary(fit2), I only get output showing the intercept and coefficient for the first variable. How can I get the coefficient values for all variables in the model? mydata = ... more

03/07/21

Test effect for linear regression

Is there a way test if there is any overall effect by comparing a model with 1 predictor to a model with two predictors in R?

02/10/21

Modify the function poker() from Ch. 12 of the Primer to a function called bridge() which deals 13 cards instead of 5. The function should also count the hand’s points as follows.

poker = function() {# a function to deal a poker hand# first, create a card decksuit = rep(c("S","H","D","C"),13)suit = sort(suit)suit = as.factor(suit)denom =... more

02/10/21

R related help for statistics

term enrollment 1 2 2 1 3 0 4 4 5 10 6 3 7 9 8 8 9 0 10 9 11 10 12 6 13 20 14 23 15 8 16 23 ... more

If I am trying to create a barplot with errors, what am I doing wrong in this code that is producing an error?

Error message: Error: unexpected '=' in:" summarise(`Support For H-1B Visas` = mean(h1bvis.supp, na.rm = TRUE) %>% sd ="Code:immig %>% mutate(`Full Sample` = case_when( ... more
R

11/06/20

How do I create a new dataset when I need to add new variables?

5b. Time Series Average by Month and YearYou'll need to do a little data prep for this one: - First figure out the top 5 reviewed coffee shops (by number of reviews ~ hint frequency of... more
R

11/02/20

Make is a variable in the data file. Why isn't it recognized?

Problem 5:use the pipe operation to `%>%` pipe data from the MPG dataframe - create a data frame called df_Toyota by performing the following -- pipe from MPG -- Filter make == 'Toyota' --... more
R

11/01/20

I keep getting errors. What is the proper syntax for comparing vectors using same_n?

##### (b) comparing vectors > Given two users's preferences between two options: [Facebook, Instagram], [Firefox, Chrome], [Mac, PC], [Summer, Winter]. - how many things do they aggree on and... more

Statistic using R

In order to adjust the values ​​of the food vouchers of the 9.443 employees of your company, a study will be carried out with the objective of evaluating the average monthly expenditure in... more

08/30/20

Statistics and R

A federal report found that a lie detector test given to someone telling the truth will suggest that they lied in about 20% of cases. A company asks the 12 job applicants for a new position about... more

Branching Processes R Code Tree Diagram

Code: 1) Write an R code for a function that simulates a branching process of a Poisson progeny distribution with mean 𝜆 and for number of generations n. 2) Then run the simulations for several... more

What does r equal to in the equation 0.5r − 3.8 = 5.66?

What's the answer to 0.5r − 3.8 = 5.66? I need to find r.
R

10/19/19

Replacement for "rename" in dplyr?

I like plyr's renaming function `rename`. I have recently started using dplyr, and was wondering if there is an easy way to rename variables using a function from dplyr, that is as easy to use as... more
R

10/18/19

How to use the 'sweep' function?

When I look at the source of R Packages, i see the function `sweep` used quite often.Sometimes it's used when a simpler function would have sufficed (e.g., `apply`),other times, it's impossible to... more
R

10/18/19

Adding a column to a data.frame?

I have the data.frame below. I want to add a column that classifies my data according to column 1 (`h_no`) in that way that the first series of h_no 1,2,3,4 is class 1, the second series of `h_no`... more
R

10/17/19

Reorder levels of a factor without changing order of values?

I have data frame with some numerical variables and some categorical `factor` variables. The order of levels for those factors is not the way I want them to be. numbers <- 1:4 letters... more
R

10/17/19

Set default CRAN mirror permanent in R?

How can I set a specific CRAN mirror permanently in R?I want to set it permanently in my laptop so that when I do `install.packages()`, it won't ask me again which mirror to choose.
R

10/17/19

How do I change the formatting of numbers on an axis with ggplot?

I'm using R and ggplot to draw a scatterplot of some data, all is fine except that the numbers on the y-axis are coming out with computer style exponent formatting, i.e. 4e+05, 5e+05, etc. This is... more

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