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Methods in Experimental Ecology I
Приєднався 27 сер 2016
Videos here are intended to:
a. help a Biology graduate course at UCF (sciences.ucf.edu/biology/d4lab/methods-1), with its own sequence of materials
b. summarize concepts and background for the hands-on study work we conduct in class
c. help understand operations in RStudio and R, with examples of analyses and data management
It is great (!) if these resources help folks not in the course, and it is fun to see that others have found these useful.
For those who wish for more out of any one video, I suggest the link above for other materials there, or in other videos for the course.
a. help a Biology graduate course at UCF (sciences.ucf.edu/biology/d4lab/methods-1), with its own sequence of materials
b. summarize concepts and background for the hands-on study work we conduct in class
c. help understand operations in RStudio and R, with examples of analyses and data management
It is great (!) if these resources help folks not in the course, and it is fun to see that others have found these useful.
For those who wish for more out of any one video, I suggest the link above for other materials there, or in other videos for the course.
Intro to Multivariate Stats
multivariate stats summarize complex data and can really help to see patterns
Переглядів: 17 689
Відео
Logistic Regressions
Переглядів 10 тис.8 років тому
A brief intro to logistic regressions, which predict binary responses to various predictors
Intro to Mixed Effect Models
Переглядів 98 тис.8 років тому
Mixed effect models include fixed (e.g., planned treatments) and random effects (e.g., time, space). Very helpful but can kinda tricky to grasp at first.
Generalized Linear Models II
Переглядів 37 тис.8 років тому
example R input and output for lm and glm models, including residuals and AICs
Generalized Linear Models I
Переглядів 50 тис.8 років тому
The basics: how GLMs differ from linear models, what link functions are about, and how to choose among them
OLS Regressions
Переглядів 9628 років тому
An intro to ordinary least square regressions (e.g., to predict Y from X)
Representing statistical variation
Переглядів 8768 років тому
Much variation abounds in measuring variation. Here we summarize best ways to present statistical variation.
Model selection with AICs
Переглядів 28 тис.8 років тому
A basis for the "new statistics" now common in ecology & evolution
ANOVAs + their matching experimental designs
Переглядів 9468 років тому
ANOVAsare prescribed by experimental designs - here they are summarized together
Analysis of variance I
Переглядів 1,1 тис.8 років тому
Intro to ANOVA - what it does, what it tells us (or not), and how it is related to regression
Z- and t-tests
Переглядів 9328 років тому
The basics of Z- and t-tests in R; how they work, and how they can be incorrectly applied. Also degrees of freedom and the central limit theorem.
Probabilities
Переглядів 5468 років тому
basic understanding of probabilities, and how to work with them. Sets up next lecture on Distributions
Awesome…
Best video to understand SMA regression. Thank you for sharing it.
Hi, why is R studio producing different results even though I am using the same call and data.
Thank you so much for this!
Very interesting شكرا لك
Clear and straightforward. Thank for the explanation.
Good stuff. Well explained.
Thanks! I would ask when I can use the model like lm, glm.. ? Is it instead of ordinary analysis?
Thank you very much
Clear and engaging, thank you!
One example of going from data to conclusion or, say, published paper does not seem likely by half way through. This is description of mixed vs. random. Does not show you what do with it. Maybe gets better second half.
Really great job 👏
is random effect and random parameter model same?
Amazing!
Hello, thanks for this really nice video! Could you please provide the image with the interactions plots and their explanation from min 13:30 and after? The quality of the video is not good enough...
So the evaluation of GLM model is done by comparing AIC values? Do we use R2 or R2 adjusted as well?
Searched for an explanation of "mixed effect models", got something totally badly introduced with very bad analogies. Sorry but you should term this video "for my students.." or alike.. this has no use for random people on youtube.
Could you share the code that you used to make the graphs? particularly the one found at 11:07?
chingon
Great presentation! I wonder if you have a few citations for the use of smatr in non-allometric applications?
Thank you
amazing! this guy needs to post more... what school does he teach at
I don't understand what's the difference between something being a block effect and a random effect.
Thanks'
I finally understand it.
Ur explanations r the best! Thanks a lot
A lecture of around 20 minutes is the perfect length!
I bet those peaks every 4-5 years in web searches correlate with statistics students trying to graduate lol
Wonderful
Sorry, but I don't see any of AIC or AICc explained here. The formulas just pop out of thin air without ever being explained, why the terms are in there and what they really mean and do in the equation. Then there is talk about AICc correcting AIC for sample size "because there is some n in the denominator", but, sorry, that is no explanation at all. What does this term correct and why exactly does it take on this form? I could write down any old formulas with n's all over the place, and contend that they "correct" AIC...
Did you find a better source that talked about this? If you did can you share it please. Thanks
@@A-human-like-you Sorry, no. Not on youtube...
It should be noted that the families can take more links (i.e. you can calculate family=gaussian(link="log"))
This is so helpful, thank you!
Thank you so much for this clear explanation! It is so helpful!!!
I always heard that looking at the base R diagnostic residual plots for generalized linear models isn't useful in the same way it is for general linear models? would like confirmation of the oppisite as it would make my current stats work easier haha
Your videos are so helpful and the way you explain the ideas and methods makes it easy to follow and understand! Thank you!
Brilliant explanation
These videos are great! I'm glad to find an ecology-focussed series on statistics!
Please interpret the result of gamma with log link coefficient results
Thank you, your presentation is very clear and easy to follow :)
Thank you for your clear explanation! Can I ask you a question about your example? I was wondering how the AICc of your quadratic model is lower then you linear model? Because if you look at the CI's of your coefficients in the quadratic model they seem to be bigger then the coefficients of the linear model. Now if i'm not mistaking, this means that the residual sum of squares (used to calculate the CI's for these coefficients) in the quadratic model must be larger then in the linear model? Or does the formula in the AICc utilize a total residual sum of squares? That is still not fully clear to me.... I hope that you can elaborate on this question.
You offer so much irrelevant stuff. Focus on your topic. We know you are clever.
Thanks for your heartwarming feedback. Please know that these "lectures" are for a graduate course in stats (sciences.ucf.edu/biology/d4lab/methods-1); thus my unclever attempts at background and context. Intended audience = my students at my campus. Accidental (and fun) benefit = others may also learn. These are not merely how-to instruction sets, like how to specify a glm. For that, we use materials in class. If that is what you seek, please examine the link above for more info. Stay healthy and ua-cam.com/video/rph_1DODXDU/v-deo.html, Dave Jenkins
Methods in Experimental Ecology I thanks. Very interesting course to offer. I will certainly go through it carefully.
Excellent explanation. Many thanks
Thank you so much! This is so so so helpful!
this is not the kerri chandler you are looking for
This was just awesome...
I really enjoy the analogies you use in your videos, the greenhouse one is really effective
You are pretty much the best teacher of these kind of topics, a perfect balance beetwen simple and difficult key concepts
I have an exam tomorrow... multivariate data? and I swear I'm watching this last-minute because my teacher's messed up. Idk if this is even related, cause I'm confused.. but hope I pass? lol...
The graph at 6:23, where did you get it from? I would like to mention it in my report.
Thanks!