UMGCCCFCSR · lkisselbach-afk · Apr 12, 2026 · Apr 14, 2026 · Apr 15, 2026 · Apr 15, 2026
diff --git a/Announcements.qmd b/Announcements.qmd
@@ -0,0 +1,43 @@
+---
+title: "Announcements"
+format: html
+toc: TRUE
+toc-location: right
+sidebar: false
+---
+
+![](/images/WebsiteBanner.png)
+
+For previous course announcements emails, see the links below. 
+
+- January 21, 2026 [Cytometry in R - Start Date, Livestream Times, Pre-Course Materials](https://github.com/UMGCCCFCSR/CytometryInR/discussions/7) 
+
+- February 01, 2026 [Cytometry In R - Week #1 - Installing R packages](https://github.com/UMGCCCFCSR/CytometryInR/discussions/11) 
+
+- February 09, 2026 [Cytometry in R - Week # 2 - File Paths](https://github.com/UMGCCCFCSR/CytometryInR/discussions/41) 
+
+- February 16, 2026 [Cytometry in R - Week #03 - Inside an FCS File](https://github.com/UMGCCCFCSR/CytometryInR/discussions/65) 
+
+- February 22, 2026 [Cytometry in R - Week #4 - Introduction to Tidyverse](https://github.com/UMGCCCFCSR/CytometryInR/discussions/85) 
+
+- March 01, 2026 [Cytometry in R - Week #5 - Gating Sets](https://github.com/UMGCCCFCSR/CytometryInR/discussions/103) 
+
+- March 10, 2026 [No Class This Week](https://github.com/UMGCCCFCSR/CytometryInR/discussions/128) 
+
+- March 17, 2026 [Cytometry in R - Week # 6 - Visualizing with ggplot2](https://github.com/UMGCCCFCSR/CytometryInR/discussions/132) 
+
+- March 24, 2026 [Cytometry in R - Week # 07 - Applying Transformations](https://github.com/UMGCCCFCSR/CytometryInR/discussions/145) 
+
+- March 30, 2026 [Cytometry in R - Course Feedback Survey #1](https://github.com/UMGCCCFCSR/CytometryInR/discussions/151) 
+
+- April 07, 2026 [Cytometry in R - Week # 08 - Manual and Automated Gating](https://github.com/UMGCCCFCSR/CytometryInR/discussions/159) 
+
+- April 12, 2026 [Cytometry in R - Week # 09 - It's Raining Functions!](https://github.com/UMGCCCFCSR/CytometryInR/discussions/162) 
+
+- April 21, 2026 [No Class This Week](https://github.com/UMGCCCFCSR/CytometryInR/discussions/174)
+
+- April 28, 2026 [Cytometry in R - Week # 10 - Downsampling and Concatenation](https://github.com/UMGCCCFCSR/CytometryInR/discussions/179)
+
+- May 05, 2026 [Cytometry in R - Week # 11 - Data for Statistics](https://github.com/UMGCCCFCSR/CytometryInR/discussions/186)
+
+![](images/YouTubeHex.png)
diff --git a/Homeworks.qmd b/Homeworks.qmd
diff --git a/README.md b/README.md
@@ -4,7 +4,7 @@ Cytometry in R is a free virtual mini-course being organized by the [Flow Cytome
 
 We are excited that so many individuals worldwide have chosen to take part, and we look forward to helping you get started on your own learning journeys. 
 
-![](/images/WorldwideSignups.png){width=100%}
+![](/images/WorldwideSignups.png){width="100%"}
 
 Click here to go to our [Course Website](https://umgcccfcsr.github.io/CytometryInR)
 

diff --git a/Schedule.qmd b/Schedule.qmd
@@ -117,7 +117,7 @@ No class week of March 30, 2026. If you are attending the [ABRF conference](http
 
 ![](https://images2.minutemediacdn.com/image/upload/c_fill,w_720,ar_16:9,f_auto,q_auto,g_auto/shape/cover/sport/raining-monkeys-e3fa8001e4eb47433b1cc58e2017d2b8.png){width=75%}
 
-[**Week 9: April 13, 2026**]{.underline} In the course of this ninth session, we tackle one of the harder but most useful concepts to learn for a beginner, namely [functions](https://r4ds.had.co.nz/functions.html). We explore what they are, how their individual arguments work, how they differ from for-loops, and how to create our own to do useful work, reduce the number times code gets copied and pasted. Additionally, some functional programming best practices will be introduced, as well as provide introduction to how to use the walk and map functions from the [purrr](https://purrr.tidyverse.org/) package. 
+[**Week 9: April 13, 2026**]{.underline} In the course of this [ninth](/course/09_Functions/index.qmd) session, we tackle one of the harder but most useful concepts to learn for a beginner, namely [functions](https://r4ds.had.co.nz/functions.html). We explore what they are, how their individual arguments work, how they differ from for-loops, and how to create our own to do useful work, reduce the number times code gets copied and pasted. Additionally, some functional programming best practices will be introduced, as well as provide introduction to how to use the walk and map functions from the [purrr](https://purrr.tidyverse.org/) package. 
 
 <br>
 <br>
@@ -126,7 +126,7 @@ No class week of March 30, 2026. If you are attending the [ABRF conference](http
 
 ![](https://www.ibm.com/content/dam/connectedassets-adobe-cms/worldwide-content/creative-assets/s-migr/ul/g/7d/10/downsampling-near-miss-v3.png){width=50%}
 
-[**Week 10: April 20, 2026**]{.underline} Within this session, we will expand on our growing understanding of GatingSets, functions and fcs file internals to write a script to downsample your fcs files to a desired number (or percentage) of cells for a given cell population. We will additionally learn how to concatenate these downsampled files together, and save them to a new .fcs file in ways that the metadata can be read by commercial software without the scaling being widely thrown off.  
+[**Week 10: April 20, 2026**]{.underline} Within this [tenth](/course/10_Downsampling/index.qmd) session, we will expand on our growing understanding of GatingSets, functions and fcs file internals to write a function to downsample your fcs files to a desired number (or percentage) of cells for a given cell population. We will additionally learn how to concatenate these downsampled files together, and save them to a new .fcs file in ways that the metadata can be read by commercial software without the scaling being widely thrown off.  
 
 <br>
 <br>
@@ -135,7 +135,7 @@ No class week of March 30, 2026. If you are attending the [ABRF conference](http
 
 ![](images/TidyData.png){width=33%}
 
-[**Week 11: April 27, 2026**]{.underline} Leveraging the increased familiarity working with the various packages this far in the course, in this session we will retrieve summary statistics for the gates within our GatingSet, and programmatically derrive out tidy data.frames for use in statistical analyses typically used by many Immunologist. In the process, we add a couple additional plot types to our ggplot2 arsenal to hold in reserve should Prism prices go up again. 
+[**Week 11: April 27, 2026**]{.underline} Leveraging the increased familiarity working with the various packages this far in the course, in this [eleventh](/course/11_DataForStats/index.qmd) session we will retrieve summary statistics for the gates within our GatingSet, and programmatically derrive out tidy data.frames for use in statistical analyses typically used by many Immunologist. In the process, we add a couple additional plot types to our ggplot2 arsenal to hold in reserve should Prism prices go up again. 
 
 <br>
 <br>

diff --git a/_quarto.yml b/_quarto.yml
@@ -6,6 +6,8 @@ project:
     - Schedule.qmd
     - ExistingResources.qmd
     - PackageWalkthroughs.qmd
+    - Homeworks.qmd
+    - Announcements.qmd
     - course/index.qmd
     - course/TakeAwayGallery.qmd
     - 00_*
@@ -17,6 +19,9 @@ project:
     - 06_*
     - 07_*   
     - 08_* 
+    - 09_*
+    - 10_*
+    - 11_*
 website:
   google-analytics: "G-LZ35J3XE4D"
   announcement: 
@@ -37,11 +42,15 @@ website:
         href: Schedule.qmd
       - text: "Course"
         href: course/index.qmd
+      - text: "Announcements"
+        href: Announcements.qmd        
     right:
     - text: Existing Resources
       href: ExistingResources.qmd
     - text: Discussions
       href: https://github.com/UMGCCCFCSR/CytometryInR/discussions
+    - text: Homeworks
+      href: Homeworks.qmd
     - icon: youtube
       href: https://www.youtube.com/@CytometryInR
       aria-label: YouTube
@@ -85,9 +94,15 @@ website:
       - text: "07 - Applying Transformations"
         href: course/07_Transformations/index.qmd
       - text: "08 - Ways to Gate"
-        href: course/08_WaysToGate/index.qmd     
+        href: course/08_WaysToGate/index.qmd    
+      - text: "09 - It's Raining Functions!"
+        href: course/09_Functions/index.qmd 
     - section: "Cytometry Core"
-      href: Schedule.qmd
+      contents:
+      - text: "10 - Downsampling and Concatenation"
+        href: course/10_Downsampling/index.qmd
+      - text: "11 - Data for Statistics"
+        href: course/11_DataForStats/index.qmd
     - section: "Beyond the Sandbox"
       href: Schedule.qmd
     - section: "The World is your Oyster"

diff --git a/course/01_InstallingRPackages/index.qmd b/course/01_InstallingRPackages/index.qmd
@@ -30,6 +30,8 @@ Before getting started, please make sure you have completed the creating a [GitH
 
 :::{.callout-important}
 Please make sure to [sync](/course/00_Homeworks/index.qmd#sync-your-fork) your forked version of the CytometryInR repository, and [pull](/course/00_Git/index.qmd#pull) any changes to your local computer's CytometryInR project folder so that you have the most recent version of the code and data available. 
+
+For YouTube walkthrough of this process, click [here](https://www.youtube.com/live/Zfctacqpe90?si=a7Ad61kj6_UDNkGw&t=32)
 :::
 
 <br>

diff --git a/course/01_InstallingRPackages/slides.qmd b/course/01_InstallingRPackages/slides.qmd
@@ -37,6 +37,7 @@ Before getting started, please make sure you have completed the creating a [GitH
 
 Please make sure to [sync](/course/00_Homeworks/index.qmd#sync-your-fork) your forked version of the CytometryInR repository, and [pull](/course/00_Git/index.qmd#pull) any changes to your local computer's CytometryInR project folder so that you have the most recent version of the code and data available. 
 
+For YouTube walkthrough of this process, click [here](https://www.youtube.com/live/Zfctacqpe90?si=a7Ad61kj6_UDNkGw&t=32)
 :::
 :::
 

diff --git a/course/02_FilePaths/index.qmd b/course/02_FilePaths/index.qmd
@@ -55,6 +55,8 @@ We will start working on our own "coding mindsets" by working with file paths, a
 
 Before we begin, let's make sure you get the data needed for today transferred to your local computer, and then get the .fcs files copied over from there to your own working project folder. This is the process you will repeat each week throughout the course. 
 
+For YouTube walkthrough of this process, click [here](https://www.youtube.com/live/Zfctacqpe90?si=a7Ad61kj6_UDNkGw&t=32)
+
 ### New Repository
 
 First off, login to your GitHub account. Once there, you will select the options to create a new repository (similar to what you did during [Using GitHub](/course/00_GitHub/index.qmd#github-repository))

diff --git a/course/02_FilePaths/slides.qmd b/course/02_FilePaths/slides.qmd
@@ -82,6 +82,8 @@ We will start working on our own "coding mindsets" by working with file paths, a
 ::: {.fragment}
 ::: {.callout-tip title="."}
 Before we begin, let's make sure you get the data needed for today transferred to your local computer, and then get the .fcs files copied over from there to your own working project folder. This is the process you will repeat each week throughout the course. 
+
+For YouTube walkthrough of this process, click [here](https://www.youtube.com/live/Zfctacqpe90?si=a7Ad61kj6_UDNkGw&t=32)
 :::
 :::
 

diff --git a/course/03_InsideFCSFile/index.qmd b/course/03_InsideFCSFile/index.qmd
@@ -47,6 +47,8 @@ If you find yourself at some point going "I have no idea what is going on", plea
 
 :::{.callout-important title="Housekeeping"}
 As we do [every week](/course/02_FilePaths/index.qmd#new-repository), on GitHub, sync your forked-version of the CytometryInR course to bring in the most recent updates. Then within Positron, pull in those changes to your local computer. From there, copy the data folder to a separate project folder you have created. This will prevent any merge issues bringing in new data next week. 
+
+For YouTube walkthrough of this process, click [here](https://www.youtube.com/live/Zfctacqpe90?si=a7Ad61kj6_UDNkGw&t=32)
 :::
 
 ---

diff --git a/course/03_InsideFCSFile/slides.qmd b/course/03_InsideFCSFile/slides.qmd
@@ -63,6 +63,8 @@ So don't power through, but rather circle back when you are in an exploring mind
 
 :::{.callout-important title="Housekeeping"}
 As we do [every week](/course/02_FilePaths/index.qmd#new-repository), on GitHub, sync your forked-version of the CytometryInR course to bring in the most recent updates. Then within Positron, pull in those changes to your local computer. From there, copy the data folder to a separate project folder you have created. This will prevent any merge issues bringing in new data next week. 
+
+For YouTube walkthrough of this process, click [here](https://www.youtube.com/live/Zfctacqpe90?si=a7Ad61kj6_UDNkGw&t=32)
 :::
 
 ---

diff --git a/course/04_IntroToTidyverse/index.qmd b/course/04_IntroToTidyverse/index.qmd
@@ -39,6 +39,8 @@ The dataset we will be using today is a manually-gated spectral flow cytometry d
 :::{.callout-important title="Housekeeping"}
 As we do [every week](/course/02_FilePaths/index.qmd), on GitHub, sync your forked version of the CytometryInR course to bring in the most recent updates. Then within Positron, pull in those changes to your local computer. 
 
+For YouTube walkthrough of this process, click [here](https://www.youtube.com/live/Zfctacqpe90?si=a7Ad61kj6_UDNkGw&t=32)
+
 After creating a "Week04" project folder, copy over the contents of "course/04_IntroToTidyverse" to that folder. This will hopefully prevent any merge issues when you attempt to bring in new data to your local Cytometry in R folder next week. Please remember once you have set up your project folder to stage, commit and pus your changes to "Week04" to GitHub so that they are backed up remotely.
 
 If you are having issues syncing due to the Take-Home Problem merge conflict, see this [walkthrough](https://umgcccfcsr.github.io/CytometryInR/course/00_BonusContent/PullConflicts/)

diff --git a/course/04_IntroToTidyverse/slides.qmd b/course/04_IntroToTidyverse/slides.qmd
@@ -66,6 +66,8 @@ The dataset we will be using today is a manually-gated spectral flow cytometry d
 :::{.callout-important title="Housekeeping"}
 As we do [every week](/course/02_FilePaths/index.qmd), on GitHub, sync your forked version of the CytometryInR course to bring in the most recent updates. Then within Positron, pull in those changes to your local computer. 
 
+For YouTube walkthrough of this process, click [here](https://www.youtube.com/live/Zfctacqpe90?si=a7Ad61kj6_UDNkGw&t=32)
+
 After creating a "Week04" project folder, copy over the contents of "course/04_IntroToTidyverse" to that folder. This will hopefully prevent any merge issues when you attempt to bring in new data to your local Cytometry in R folder next week. Please remember once you have set up your project folder to stage, commit and pus your changes to "Week04" to GitHub so that they are backed up remotely.
 
 If you are having issues syncing due to the Take-Home Problem merge conflict, see this [walkthrough](https://umgcccfcsr.github.io/CytometryInR/course/00_BonusContent/PullConflicts/)

diff --git a/course/05_GatingSets/index.qmd b/course/05_GatingSets/index.qmd
@@ -37,6 +37,8 @@ This infrastructural requirement within the R context is primarily handled by th
 :::{.callout-important title="Housekeeping"}
 As we do [every week](/course/02_FilePaths/index.qmd), on GitHub, [sync](/course/00_Homeworks/index.qmd#sync-your-fork) your forked version of the CytometryInR course to bring in the most recent updates. Then within Positron, [pull](/course/00_Homeworks/index.qmd#pull-to-local) in those changes to your local computer. 
 
+For YouTube walkthrough of this process, click [here](https://www.youtube.com/live/Zfctacqpe90?si=a7Ad61kj6_UDNkGw&t=32)
+
 After [setting up](/course/00_Git/index.qmd#new-folder-from-template) a "Week05" project folder, copy over the contents of "course/05_GatingSets/data" to that folder. This will hopefully prevent merge issues next week when attempting to pull in new course material. Once you have your new project folder organized, remember to [commit](/course/00_Git/index.qmd#push) and push your changes to GitHub to maintain remote version control. 
 
 If you encounter issues syncing due to the Take-Home Problem merge conflict, see this [walkthrough](https://umgcccfcsr.github.io/CytometryInR/course/00_BonusContent/PullConflicts/). The updated homework submission protocol can be found [here](https://umgcccfcsr.github.io/CytometryInR/course/00_BonusContent/PullConflicts/UpdatedPullRequest)

diff --git a/course/05_GatingSets/slides.qmd b/course/05_GatingSets/slides.qmd
@@ -52,6 +52,8 @@ This infrastructural requirement within the R context is primarily handled by th
 :::{.callout-important title="Housekeeping"}
 As we do [every week](/course/02_FilePaths/index.qmd), on GitHub, [sync](/course/00_Homeworks/index.qmd#sync-your-fork) your forked version of the CytometryInR course to bring in the most recent updates. Then within Positron, [pull](/course/00_Homeworks/index.qmd#pull-to-local) in those changes to your local computer. 
 
+For YouTube walkthrough of this process, click [here](https://www.youtube.com/live/Zfctacqpe90?si=a7Ad61kj6_UDNkGw&t=32)
+
 After [setting up](/course/00_Git/index.qmd#new-folder-from-template) a "Week05" project folder, copy over the contents of "course/05_GatingSets/data" to that folder. This will hopefully prevent merge issues next week when attempting to pull in new course material. Once you have your new project folder organized, remember to [commit](/course/00_Git/index.qmd#push) and push your changes to GitHub to maintain remote version control. 
 
 If you encounter issues syncing due to the Take-Home Problem merge conflict, see this [walkthrough](https://umgcccfcsr.github.io/CytometryInR/course/00_BonusContent/PullConflicts/). The updated homework submission protocol can be found [here](https://umgcccfcsr.github.io/CytometryInR/course/00_BonusContent/PullConflicts/UpdatedPullRequest)

diff --git a/course/06_Visualizing/index.qmd b/course/06_Visualizing/index.qmd
@@ -37,6 +37,8 @@ One of `ggplot2`'s core strengths is its utilization of the [grammar of graphics
 :::{.callout-important title="Housekeeping"}
 As we do [every week](/course/02_FilePaths/index.qmd), on GitHub, [sync](/course/00_Homeworks/index.qmd#sync-your-fork) your forked version of the CytometryInR course to bring in the most recent updates. Then within Positron, [pull](/course/00_Homeworks/index.qmd#pull-to-local) in those changes to your local computer. 
 
+For YouTube walkthrough of this process, click [here](https://www.youtube.com/live/Zfctacqpe90?si=a7Ad61kj6_UDNkGw&t=32)
+
 After [setting up](/course/00_Git/index.qmd#new-folder-from-template) a "Week06" project folder, copy over the contents of "course/06_Visualizing/data" to that folder. This will hopefully prevent merge issues next week when attempting to pull in new course material. Once you have your new project folder organized, remember to [commit](/course/00_Git/index.qmd#push) and push your changes to GitHub to maintain remote version control. 
 
 If you encounter issues syncing due to the Take-Home Problem merge conflict, see this [walkthrough](https://umgcccfcsr.github.io/CytometryInR/course/00_BonusContent/PullConflicts/). The updated homework submission protocol can be found [here](https://umgcccfcsr.github.io/CytometryInR/course/00_BonusContent/PullConflicts/UpdatedPullRequest)

diff --git a/course/06_Visualizing/slides.qmd b/course/06_Visualizing/slides.qmd
@@ -56,6 +56,8 @@ One of `ggplot2`'s core strengths is its utilization of the [grammar of graphics
 :::{.callout-important title="Housekeeping"}
 As we do [every week](/course/02_FilePaths/index.qmd), on GitHub, [sync](/course/00_Homeworks/index.qmd#sync-your-fork) your forked version of the CytometryInR course to bring in the most recent updates. Then within Positron, [pull](/course/00_Homeworks/index.qmd#pull-to-local) in those changes to your local computer. 
 
+For YouTube walkthrough of this process, click [here](https://www.youtube.com/live/Zfctacqpe90?si=a7Ad61kj6_UDNkGw&t=32)
+
 After [setting up](/course/00_Git/index.qmd#new-folder-from-template) a "Week06" project folder, copy over the contents of "course/06_Visualizing/data" to that folder. This will hopefully prevent merge issues next week when attempting to pull in new course material. Once you have your new project folder organized, remember to [commit](/course/00_Git/index.qmd#push) and push your changes to GitHub to maintain remote version control. 
 
 If you encounter issues syncing due to the Take-Home Problem merge conflict, see this [walkthrough](https://umgcccfcsr.github.io/CytometryInR/course/00_BonusContent/PullConflicts/). The updated homework submission protocol can be found [here](https://umgcccfcsr.github.io/CytometryInR/course/00_BonusContent/PullConflicts/UpdatedPullRequest)
-Original file line number
+Diff line change
@@ Expand Up @@
     :::{.callout-important}
     Please make sure to [sync](/course/00_Homeworks/index.qmd#sync-your-fork) your forked version of the CytometryInR repository, and [pull](/course/00_Git/index.qmd#pull) any changes to your local computer's CytometryInR project folder so that you have the most recent version of the code and data available.
+    For YouTube walkthrough of this process, click [here](https://www.youtube.com/live/Zfctacqpe90?si=a7Ad61kj6_UDNkGw&t=32)
     :::
     <br>
@@ Expand Down @@