Add these options in the opening brackets and separate multiple ones with commas:
I will cover other chunk options later, once you’ve gotten the chance to try writting R Markdown files.
You can set “global” options at the beginning of the document. This will create new defaults for all of the chunks in the document. For example, if you want echo , warning , and message to be FALSE by default in all code chunks, you can run:
If you set both global and local chunk options that you set specifically for a chunk will take precedence over global options. For example, running a document with:
would print the code for the check_nepali chunk, because the option specified for that specific chunk ( echo = TRUE ) would override the global option ( echo = FALSE ).
You can also include R output directly in your text (“inline”) using backticks:
“There are `r nrow(nepali)` observations in the nepali data set. The average age is `r mean(nepali$age, na.rm = TRUE)` months.”
Once the file is rendered, this gives:
“There are 1000 observations in the nepali data set. The average age is 37.662 months.”
Here are two tips that will help you diagnose some problems rendering R Markdown files:
You’ll want to try out pieces of your code as you write an R Markdown document. There are a few ways you can do that:
You can render R Markdown documents to other formats:
Click the button to the right of “Knit” to see different options for rendering on your computer.
You can freely post your RMarkdown documents at RPubs . If you want to post to RPubs, you need to create an account. Once you do, you can click the “Publish” button on the window that pops up with your rendered file. RPubs can also be a great place to look for interesting example code, although it sometimes can be pretty overwhelmed with MOOC homework.
If you’d like to find out more, here are two good how-to books on reproducible research in R (the CSU library has both in hard copy):
R style guidelines provide rules for how to format code in an R script. Some people develop their own style as they learn to code. However, it is easy to get in the habit of following style guidelines, and they offer some important advantages:
For this course, we will use R style guidelines from two sources:
These two sets of style guidelines are very similar.
Hear are a few guidelines we’ve already covered in class:
Google: Keep lines to 80 characters or less
To set your script pane to be limited to 80 characters, go to “RStudio” -> “Preferences” -> “Code” -> “Display”, and set “Margin Column” to 80.
This guideline helps ensure that your code is formatted in a way that you can see all of the code without scrolling horizontally (left and right).
Although you can use a semicolon to put two lines of code on the same line, you should avoid it.
Note that this grouping often happens naturally when using tidyverse functions, since they encourage piping ( %>% and + ).
We’ll learn more about satisfying these guidelines when we talk about writing your own functions in the next part of the class.
You can write equations in RMarkdown documents by setting them apart with dollar signs ( $ ). For an equation on a line by itself ( display equation ), you two $ s before and after the equation, on separate lines, then use LaTex syntax for writing the equations.
To help with this, you may want to use this LaTex math cheat sheet. . You may also find an online LaTex equation editor like Codecogs.com helpful.
Note: Equations denoted this way will always compile for pdf documents, but won’t always come through on Markdown files (for example, GitHub won’t compile math equations).
For example, writing this in your R Markdown file:
will result in this rendered equation:
\[ E(Y_{t}) \sim \beta_{0} + \beta_{1}X_{1} \]
To put math within a sentence ( inline equation ), just use one $ on either side of the math. For example, writing this in a R Markdown file:
The rendered document will show up as:
“We are trying to model \(E(Y_{t})\) .”
You can include not only figures that you create with R, but also figures that you have saved on your computer.
The best way to do that is with the include_graphics function in knitr :
This example would include a figure with the filename “MyFigure.png” that is saved in the “figures” sub-directory of the parent directory of the directory where your .Rmd is saved. Don’t forget that you will need to give an absolute pathway or the relative pathway from the directory where the .Rmd file is saved .
You can save figures that you create in R. Typically, you won’t need to save figures for an R Markdown file, since you can include figure code directly. However, you will sometimes want to save a figure from a script. You have two options:
To make your research more reproducible, use the second choice.
To use code export a figure you created in R, take three steps:
For example, the following code would save a scatterplot of time versus passes as a pdf named “MyFigure” in the “figures” subdirectory of the current working directory:
If you create multiple plots before you close the device, they’ll all save to different pages of the same pdf file.
You can open a number of different graphics devices. Here are some of the functions you can use to open graphics devices:
You will use a device-specific function to open a graphics device (e.g., pdf ). However, you will always close these devices with dev.off .
Most of the functions to open graphics devices include parameters like height and width . These can be used to specify the size of the output figure. The units for these depend on the device (e.g., inches for pdf , pixels by default for png ). Use the helpfile for the function to determine these details.
If you want to create a nice, formatted table from an R dataframe, you can do that using kable from the knitr package.
letters | numbers |
---|---|
a | 1 |
b | 2 |
c | 3 |
There are a few options for the kable function:
arg | expl |
---|---|
Column names (default: column name in the dataframe) | |
A vector giving the alignment for each column (‘l’, ‘c’, ‘r’) | |
Table caption | |
Number of digits to round to. If you want to round columns different amounts, use a vector with one element for each column. |
First 3 letters | First 3 numbers |
---|---|
a | -1.13 |
b | 0.21 |
c | -0.21 |
From Yihui:
“ Want more features? No, that is all I have. You should turn to other packages for help. I’m not going to reinvent their wheels.”
If you want to do fancier tables, you may want to explore the xtable and pander packages. As a note, these might both be more effective when compiling to pdf, rather than html.
For all of today’s tasks, you’ll use the code from last week’s in-course exercise to do the exercises. This week we are not focusing on writing new code, but rather on how to take R code and put it in an R Markdown file, so we can create reports from files that include the original code.
First, you’ll create a Markdown document, without any R code in it yet.
In RStudio, go to “File” -> “New File” -> “R Markdown”. From the window that brings up, choose “Document” on the left-hand column and “HTML” as the output format. A new file will open in the script pane of your RStudio session. Save this file (you may pick the name and directory). The file extension should be “.Rmd”.
First, before you try to write your own Markdown, try rendering the example that the script includes by default. (This code is always included, as a template, when you first open a new RMarkdown file using the RStudio “New file” interface we used in this example.) Try rendering this default R Markdown example by clicking the “Knit” button at the top of the script file.
For some of you, you may not yet have everything you need on your computer to be able to get this to work. If so, let me know. RStudio usually includes all the necessary tools when you install it, but there may be some exceptions.
If you could get the document to knit, do the following tasks:
Now incorporate the R code from previous weeks’ exercises into your document. Once you get the document to render with some basic pieces of code in it, try the following:
Finally, try the following tasks to get some experience working with R Markdown files in RStudio:
Go through all the R code in your R Markdown file. Are there are places where your code is not following style conventions for R? Clean up your code to correct any of these issues.
This is my submission for Reproducible Research Course Project 1. To read more information view the ReadMe on GitHub.
The data for the assignment can be downloaded here .
Show any code that is needed to 1. Load the data (i.e. read.csv()) 2. Process/transform the data (if necessary) into a format suitable for your analysis
As we can see, the variables included in this dataset are: 1. steps : Number of steps taking in a 5-minute interval (missing values are coded as NA) 2. date : The date on which the measurement was taken in YYYY-MM-DD format 3. interval : Identifier for the 5-minute interval in which measurement was taken
For this part of the assignment, you can ignore the missing values in the dataset. 1. Calculate the total number of steps taken per day 2. Make a histogram of the total number of steps taken each day 3. Calculate and report the mean and median total number of steps taken per day
1. Number of steps per day
2. Histogram of the total number of steps taken each day
3. Mean and median of total number of steps taken per day
1. Make a time series plot (i.e. type = “l”) of the 5-minute interval (x-axis) and the average number of steps taken, averaged across all days (y-axis) 2. Which 5-minute interval, on average across all the days in the dataset, contains the maximum number of steps?
1. Time series plot of the 5 minute interval (x) and averaged number of steps taken averaged across all days (y)
2. 5-minute interval (on average across all the days) with the maximum number of steps
Note that there are a number of days/intervals where there are missing values (coded as NA). The presence of missing days may introduce bias into some calculations or summaries of the data. 1. Calculate and report the total number of missing values in the dataset (i.e. the total number of rows with NAs) 2. Devise a strategy for filling in all of the missing values in the dataset. The strategy does not need to be sophisticated. For example, you could use the mean/median for that day, or the mean for that 5-minute interval, etc. 3. Create a new dataset that is equal to the original dataset but with the missing data filled in. 4. Make a histogram of the total number of steps taken each day and Calculate and report the mean and median total number of steps taken per day. Do these values differ from the estimates from the first part of the assignment? What is the impact of imputing missing data on the estimates of the total daily number of steps?
1. Total number of missing values in the dataset
2. Replace missing values The rounded values of the average 5-minute interval is used to replace the NA values. CompleteSteps is the new column without missing values.
3. New dataset that is equal to the original dataset but with the missing data filled in The first ten values of the new dataset are shown below.
4A. Histogram of the total number of steps taken each day with missing data filled in
4B. Calculate and report the mean and median total number of steps taken per day. Do these values differ from the estimates from the first part of the assignment? What is the impact of imputing missing data on the estimates of the total daily number of steps?
Imputing missing data have only a little and transcurable impact on the mean ant the median of the total daily number of steps. Watching the histogram we can note than the only bin that is changed is the interval between 10000 and 12500 steps, grown from a frequency of 18 to a frequency of 26. Different methods for replace missing values could cause different results.
For this part the weekdays() function may be of some help here. Use the dataset with the filled-in missing values for this part. 1. Create a new factor variable in the dataset with two levels - “weekday” and “weekend” indicating whether a given date is a weekday or weekend day. 2. Make a panel plot containing a time series plot (i.e. type = “l”) of the 5-minute interval (x-axis) and the average number of steps taken, averaged across all weekday days or weekend days (y-axis).
1. Create a new factor variable in the dataset with two levels - “weekday” and “weekend” indicating whether a given date is a weekday or weekend day. DayType is the new column indicating if the day is a weekday day or a weekend day: the first ten values of the new table are shown below
2. Two time series plot of the 5-minute interval (x) and the average number of steps taken averaged across weekday days or weekend days (y).
Instantly share code, notes, and snippets.
title | author | date |
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github repo for rest of specialization: Data Science Coursera
It is now possible to collect a large amount of data about personal movement using activity monitoring devices such as a Fitbit, Nike Fuelband, or Jawbone Up. These type of devices are part of the “quantified self” movement – a group of enthusiasts who take measurements about themselves regularly to improve their health, to find patterns in their behavior, or because they are tech geeks. But these data remain under-utilized both because the raw data are hard to obtain and there is a lack of statistical methods and software for processing and interpreting the data.
This assignment makes use of data from a personal activity monitoring device. This device collects data at 5 minute intervals through out the day. The data consists of two months of data from an anonymous individual collected during the months of October and November, 2012 and include the number of steps taken in 5 minute intervals each day.
The data for this assignment can be downloaded from the course web site:
The variables included in this dataset are:
steps: Number of steps taking in a 5-minute interval (missing values are coded as 𝙽𝙰) date: The date on which the measurement was taken in YYYY-MM-DD format interval: Identifier for the 5-minute interval in which measurement was taken The dataset is stored in a comma-separated-value (CSV) file and there are a total of 17,568 observations in this dataset.
Unzip data to obtain a csv file.
What is mean total number of steps taken per day.
Type of Estimate | Mean_Steps | Median_Steps |
---|---|---|
First Part (with na) | 10765 | 10765 |
Second Part (fillin in na with median) | 9354.23 | 10395 |
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It is a popular consumer monitoring technique. I know big companies use eye-tracking or smart pick systems. This allows you to track the emotional state and stressful situations when choosing a product. The first site to use the smart gatherer system was an educational resource for students. This is a complex selection and variability of emotions. This system was supposed to show the productivity of the brain in stressful situations.
It seems to me that you are talking about automation or false hopes. I recommend that you read a few books by Ray Bradbury https://freebooksummary.com/category/dark-they-were-and-golden-eyed or Elon Musk. Futurists will help you answer your questions. I like science fiction stories and it's not a secret. This forum is about programming.
This is an R Markdown document for “Course Project 1” of “Reproducible Research” in Coursera.
Initialization, reading dataset and additional preparation for the next operations.
You can see the histogram of total numer of steps taken each day.The most frequent step range is between 10,000 and 15,000. Also the curve looks like normal distribution. Not so often over 20,000 steps. The R script is simple using “tapply()” for “step” and “date”.
Mean and median number of steps taken each day are 1.076710^{4} and 10766. The median is rounded off using “round()”.
Here are the R script and chart to show the average number of steps for each interval. The script was cleaned up the activity data, and the average steps were plotted for each 5-minute. The intervals are transformed into actual time in advance. Many steps were obseved around 9:00AM because of commuting time probably.
The 5-minute interval that, on average, contains the maximum number of steps is 806.
The number of imputing missing data, specified as “NA”“, is 2304.
In comparison with the previous histogram shown in #3, this is total number of steps taken each day after missing values are imputed. That means all “NA” are taked into account. There are very small difference between them.
In comparison to #4, here are the R script and chart to show the average number of steps for each interval on weekends and weekdays. We can identify that the activity in the morning of weekdays was very high. Also the commuting timing in the morning may be much more accurate that that of in the evening.
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This is my submission for the Coursera assignment, for the Reproducible Research course. The files in this repo are: The R Markdown document, containing the R code and written explanations, can be found in the file PA1_template.Rmd.The same document, in Markdown format, can be found at PA1_template.md, and the HTML version at PA1_template.html.; The "figure" folder contains all of the ...
##Assignment Instructions 1.Code for reading in the dataset and/or processing the data 2.Histogram of the total number of steps taken each day 3.Mean and median number of steps taken each day 4.Time series plot of the average number of steps taken 5.The 5-minute interval that, on average, contains the maximum number of steps 6.Code to describe and show a strategy for imputing missing data 7 ...
Course Project 1 aims to answer questions and accomplish tasks to create a Reproducible Research. The dataset used for this assignment is the repdata_data_activity.zip, which has data about personal movement (steps): 279 kBytes (calculate using pryr package) 3 variables. 17.568 observations.
This project forms part of the Reproducible Research course on Coursera. The goal of this project is to give the student an opportunity to conduct an analysis that is reproducible: "the ability of an entire [study] to be reproduced, etheir by the researcher or by someone else working independently" ( Wikipedia ).
Course Project 1 of Reproducible Research by John Hopkins University on Coursera. by Anjana Ramesh.
About. Reproducible Research (one of Data Science Specialization courses) Course Project 1 makes use of data from a personal activity monitoring device. This device collects data at 5 minute intervals through out the day. The data consists of two months of data from an anonymous individual collected during the months of October and November, 2012 and include the number of steps taken in 5 ...
1. Calculate the total number of steps taken per day. 2.If you do not understand the difference between a histogram and a barplot, research the difference between them. Make a histogram of the total number of steps taken each day. 3.Calculate and report the mean and median of the total number of steps taken per day.
Here are the basics of opening and rendering an R Markdown file in RStudio: To open a new R Markdown file, go to "File" -> "New File" -> "RMarkdown…" -> for now, chose a "Document" in "HTML" format. This will open a new R Markdown file in RStudio. The file extension for R Markdown files is ".Rmd".
First project of the Coursera Course Reproducible Research - schen57/Reproducible-Research-Course-Project-1
For this part of the assignment, you can ignore the missing values in the dataset. 1. Calculate the total number of steps taken per day. 2. Make a histogram of the total number of steps taken each day. 3. Calculate and report the mean and median total number of steps taken per day. 1.
Reproducible Research: Course Project One Adam Blanch 4/23/2020. This has been published at Rpubs to view the html without needing to fork the repositorary or knitr the r markdown file. ... For questions 1 to 3 we found 8 of 61 days contain no activity data. 0 days contain missing data. So we choose to just ignore the missing days.
Sign inRegister. Reproducible Research Week 2 Course Project 1. by Jason Pemberton. Last updatedover 2 years ago. HideComments(-)ShareHide Toolbars. ×. Post on: TwitterFacebookGoogle+. Or copy & paste this link into an email or IM:
RPubs. by RStudio. Sign inRegister. Coursera - Reproducible research - Course project 1. by Julien Balmont. Last updatedalmost 8 years ago. HideComments(-)ShareHide Toolbars. ×. Post on:
Reproducible Research Week 2 Course Project 1 Jeff Charatan. Introduction. It is now possible to collect a large amount of data about personal movement using activity monitoring devices such as a Fitbit, Nike Fuelband, or Jawbone Up. These type of devices are part of the "quantified self" movement - a group of enthusiasts who take ...
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RPubs - Reproducible Research Course Project 1. by Josias Alvarenga. about 7 years ago.
Reproducible Research. week 2. Course Project 1. 0. Turn off scientific notation. options (scipen = 999) 0.1. We load the libraries that we are going to use. packages <- c ('dplyr', #For data manipulation. 'lubridate', #To work with date-times and time-spans. 'ggplot2', #For graphics 'sqldf', #configure and transparently import a database ...
The strategy does not need to be sophisticated. For example, you could use the mean/median for that day, or the mean for that 5-minute interval, etc. # Filling in missing values with median of dataset. activityDT [is.na ( steps ), "steps"] <-activityDT [, c (lapply ( .SD, median, na.rm=TRUE )), .SDcols= c ( "steps" )] Create a new dataset that ...
[Course Project 1] Reproducible Research; by Anderson Hitoshi Uyekita; Last updated about 2 years ago; Hide Comments (-) Share Hide Toolbars
Peer-graded Assignment: Course Project 1. This is an R Markdown document for "Course Project 1" of "Reproducible Research" in Coursera. 1. Code for reading in the dataset and/or processing the data. Initialization, reading dataset and additional preparation for the next operations.
The data for this assignment can be downloaded from the course web site: Dataset: Activity monitoring data [52K] The variables included in this dataset are: steps: Number of steps taking in a 5-minute interval (missing values are coded as NA). date: The date on which the measurement was taken in YYYY-MM-DD format. interval: Identifier for the 5-minute interval in which measurement was taken
RPubs - Project Assignment 1 - Coursera Course Reproducible Research. Project Assignment 1 - Coursera Course Reproducible Research. by Philip Ohlsson. Last updated about 9 years ago.