- Видео 20
- Просмотров 3 924 627
Jim Grange
Великобритания
Добавлен 29 май 2010
Data, Statistics, R programming, Research Methods.
Statistics with R, Ep 05: FUNCTIONS!
View the full series playlist here: ruclips.net/p/PLYKAJI3_Ihx-yidN7OZmuC5ndsagbOmI4
In this video I introduce you to basic functions in R.
Chapters:
00:00 Introduction
00:27 Functions as a pipeline
00:56 Function syntax
01:27 Using the mean function in R
02:21 Help files for functions
03:22 Saving output to variable
03:44 Other simple functions
05:30 Passing multiple arguments to functions
---
Music: Miami by Del (soundcloud.com/del-sound/miami-original-mix) is licensed under a Creative Commons license (creativecommons.org/licenses/by-sa/3.0/).
In this video I introduce you to basic functions in R.
Chapters:
00:00 Introduction
00:27 Functions as a pipeline
00:56 Function syntax
01:27 Using the mean function in R
02:21 Help files for functions
03:22 Saving output to variable
03:44 Other simple functions
05:30 Passing multiple arguments to functions
---
Music: Miami by Del (soundcloud.com/del-sound/miami-original-mix) is licensed under a Creative Commons license (creativecommons.org/licenses/by-sa/3.0/).
Просмотров: 50
Видео
Statistics with R, Ep 04: Scripts!
Просмотров 556 месяцев назад
View the full series playlist here: ruclips.net/p/PLYKAJI3_Ihx-yidN7OZmuC5ndsagbOmI4 In this episode, I cover the use of scripts in R, including what a script is, why you should use them, and how to organise your scripts to maximise the efficiency of your project workflow. Chapters: 00:00 Introduction 00:30 What are scripts & why use them? 03:02 Creating a script 05:43 Saving & loading scripts ...
Statistics with R, Ep 03: Fundamentals
Просмотров 746 месяцев назад
View the full series playlist here: ruclips.net/p/PLYKAJI3_Ihx-yidN7OZmuC5ndsagbOmI4 In this video, I cover the fundamentals of R, including data elements, variables, and more complicated data structures like vectors and data frames. You can download the free worksheet to accompany the video here: osf.io/ym84w/ Chapters: 00:00 Introduction 00:54 Basic data elements 04:14 Arithmetic operators 07...
Statistics with R, Ep 02: Installing R & R Studio
Просмотров 2626 месяцев назад
View the full series playlist here: ruclips.net/p/PLYKAJI3_Ihx-yidN7OZmuC5ndsagbOmI4 In this video, I show you how to download the programming language R, and the powerful user-interface R Studio. Download link: posit.co/download/ Chapters: 00:00 Introduction 00:34 Why both R & R Studio? 01:52 Installing R & R Studio 02:27 Overview of R Studio panes 04:51 Customising appearance Music: Miami by ...
Statistics with R, Ep 01: Why YOU should learn R!
Просмотров 1006 месяцев назад
View the full series playlist here: ruclips.net/p/PLYKAJI3_Ihx-yidN7OZmuC5ndsagbOmI4 This is the first video in a tutorial series showing you how to use R statistics. In this first video, I provide an overview of why you should invest the time in learning R. Chapters: 00:00 Introduction 01:29 What is R? 02:33 Advantages of R 09:19 Disadvantages of R Music: Miami by Del (soundcloud.com/del-sound...
Statistics without Fear: Welcome to the channel!
Просмотров 1697 месяцев назад
Welcome to Statistics Without Fear! This channel's mission is to help reduce your fear of learning statistics and research methods, and hopefully even show you that it can be fascinating. Royalty Free Music: Bensound.com/royalty-free-music License code: 67OJWTJJFMF5DBSK
What is a p value?
Просмотров 6 тыс.8 лет назад
In this video, I provide a brief conceptual understanding of what a p-value is in psychological statistics
flankr: An Overview
Просмотров 1,9 тыс.9 лет назад
An overview of the R package "flankr": Implementing computational models of attentional selectivity. You can download the example script used in this video here: dl.dropboxusercontent.com/u/33530204/flankrDemo.R The paper is available here: link.springer.com/article/10.3758/s13428-015-0615-y 0:51 - Introduction to the flanker task 3:31 - The Dual Stage Two Phase (DSTP) model 7:07 - The Shrinkin...
Two-way independent-measures ANOVA in SPSS
Просмотров 11 тыс.9 лет назад
How to conduct a two-way independent-measures (unrelated, also called "between-subjects") ANOVA in SPSS (PASW). View in HD (720p) and in full screen for best resolution.
Saving multiple plots to PDF in R
Просмотров 31 тыс.9 лет назад
I show you how to save multiple plots to the same PDF file using R statistics.
Correlation in Excel
Просмотров 11 тыс.10 лет назад
I show you how to conduct correlations in Microsoft Excel. It's a little tricky, as Excel doesn't give you the significance of the correlation. But, I show you how to do this via a neat intermediate transformation. The equations I entered to calculate t are below: =(r*(SQRT(n-2)) / SQRT(1-r^2)) which equals =(0.60316 * (sqrt(28)) / SQRT(1 - 0.3638))
Main effects & interactions
Просмотров 370 тыс.10 лет назад
A short video explaining main effects and interactions in factorial ANOVA experiments.
APA formatted table in MS Word 2010
Просмотров 430 тыс.11 лет назад
This video shows you how to create APA formatted tables in Microsoft Word 2007/10.
APA Formatting 6th Edition in MS Word
Просмотров 398 тыс.13 лет назад
How to format a paper according to APA (6th edition) standards in Microsoft Word 2007. For an excellent Flash presentation, see here: flash1r.apa.org/apastyle/basics/
APA Formatted Table in Open Office
Просмотров 8 тыс.13 лет назад
How to do a correctly-formatted APA table in the free software Open Office
Two-way repeated-measures ANOVA in SPSS
Просмотров 285 тыс.13 лет назад
Two-way repeated-measures ANOVA in SPSS
THANK U LOT U SAVE MY LIFE IN LAST HOUR
Hmmm
Hmmmm?
Great😂
Hello Sir! Your videos are really helpful. When you will upload the other episodes here?
What if I had two columns of consumer age and another row of the purchase amount, and I wanted to see if there was a correlation between the two, which t-test would I use
You would use the =CORREL(range1, range2) function, where range1 is your ages and range2 is your purchase amount. This returns a pearson's r value (between -1 and 1)
@JimGrange. Thanks for that Jim, also how would I go about getting a sample of age ranges from my mass of data so I can do another T-test ? I can't seem to find the answer online
@@rossl5908 Sorry I'm not sure what you mean?
Thank you so much Sir! I have an interview in 40 mins. I always gets confused while explaining t-test. best explanation. Thank you!!
Good luck in the interview - let us know how it goes!
Thank you this is so much more clear than the mess my lecturer left me with!!
Thank you from the University of Cape Town!
Working on my data analysis now and I already calculated the mean for 2 groups I want to compare but excel tells me I can't just select the calculated mean. So we can only select a list of values from which it will calculate the mean?
Correct - You cannot do a t-test just between two mean values. You need the individual data points
Very helpful video. Thank you for taking the time to post it and make it public.
My pleasure! Thanks for your feedback
Does the same explanation apply to a moderated regression analysis ? Let's say we get all coefficients as significant / moderator is dummy coded 1 for women and 0 for men. If we have a significant negative coefficient for the interaction term, we could say there is a decrease in Y as X increases, but this decrease is stronger for the women's group? How can we better explain the interaction effect when reporting results in a journal? The effect of X on Y is stronger in women? Do we report the difference in numbers? Could you provide an example of how to formally report a moderated regression with a dummy variable?
Yes, a moderated regression is the same as an interaction. ANOVA is basically regression in disguise.
For a now retired but still active biomedical scientist this is the best explanation I've ever seen of main effects and interaction
High praise indeed! Thank you so much :)
best video on the subject
Thanks so much
Any time!
This new series is awesome!! So helpful and easy to follow thanks Dr Grange
Excellent video 🌟❤️
Ahhhh thanks so much, @kamilas7737! Is there anything else you'd like to see explained in a tutorial video?
Thanks a million
My absolute pleasure. Drop a comment if there's something else you'd like to see a video on.
Thank you so much for this! Just one thing regarding the interaction effect. When I saw a few graphs showing two variables that cross each other while both variables had the same level of gradient, I at first thought there was no interaction effect. Since yes, one variable rises while the other one falls, but both had the same level of gradient. But there is still an interaction effect, as I found out. So I personally find it easier to memorize that there's always an interaction effect as long as the two variables aren't parallel.
That's a great way of thinking about it!
@@JimGrange. Thank you :) it's good to have this method confirmed by an expert haha
You can download the free worksheet to accompany the video here: osf.io/ym84w/. Enjoy!
Thank you... that is useful
Glad it was helpful!
Really helpful video! Thanks Dr Grange ✊
My pleasure!
fantastic - great help!
Glad you found it of use. Anything else you would like help with in Excel? I am making more videos!
@@JimGrange. perhaps the tests for the assumptions (Levenes etc). There are other videos on them, of course, but you explain things very clearly.
Been stuck on this in 2 days, this video cleared everything up. Thank you Jim!
Absolute pleasure!
this helped me so much!! thank you
Very well explained i would imagne the math across multiple dimensions might be a bit more complex
The easiest to understand explanation of all the different videos i have looked at. Perfect! Thank you!
why is there no sound?
There is sound.
This is the best explanation I've found to describe a t test. Thank you!
SUPER USEFUL!!!
Just about 5k views on such an amazing content? Sad😢!! Well, Thank you so so much!!
How do i find the r and t value?
Amazingly comprehendible
My lecturer would not stop going on tangents and then pausing only to attempt three more times to explain what these effects are. My test is tomorrow, you are a life saver. Thank you!
How did the test go?
How can I order this product?
best explanation on this topic .Thank you.
Thank you very much! Your instruction is straight forward thus understandable, that helps me to solve my problem.
Clear explanation. This helps me a lot! Thank you~~
Thank you so much
This should count as humanitarian service. Thank you sir!
still relevant and very helpful, thank you
Wow great video. Thank You Dear!
I just wanted to say thank you so much. I was struggling with the university tutorials when it came to moving the variables across. They never said to make sure it was in the right order inline with the levels. You made it so simple! Thank you again.
Thank YOU for the VERY clear video!
great vid. thank you
Great explanation. Thank you.
Thank you. I hink you only forgot to mention that if they will eventually INTERSECT on one end of the lines ( which in this case yes they will intersect on the upper left) meaning if we used a different amount of caffeine in the pill or had them skeep deprived less than 1 hour. No intersection = no interaction.
Great tutorial--easy to follow, brief, and still relevant for later version of MS Word.
Nice examples. Thanks.
I got minus, i want it positive, how?
You can just ignore the sign. It's negative because one of your conditions is lower than the other, and you likely entered that lower condition as the first condition in the t-test. It doesn't change the interpretation of the t-test.
How to say that it's significant at 0.05 level??