add links to matrix tutorial

and sockeye image with inset
atsa-es · Feb 2, 2021 · 313ff3e · 313ff3e
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diff --git a/Lab-basic-matrix/basic-matrix-math.Rmd b/Lab-basic-matrix/basic-matrix-math.Rmd
@@ -10,6 +10,11 @@ This chapter reviews the basic matrix math operations that you will need to unde
 
 A script with all the R code in the chapter can be downloaded  [here](./Rcode/basic-matrix-math.R).
 
+After reviewing the material, you can check your knowledge via an [online quiz](https://atsa.shinyapps.io/matrix/) (with solutions) or run the quiz from R using the atsalibrary package:
+```
+learnr::run_tutorial("matrix", package="atsalibrary")
+```
+
 
 ## Creating matrices in R  {#sec-basicmat-create}
 Create a $3 \times 4$ matrix, meaning 3 row and 4 columns, that is all 1s:

diff --git a/Lab-fitting-DLMs/DLM.Rmd b/Lab-fitting-DLMs/DLM.Rmd
@@ -768,7 +768,7 @@ https://www.ramlegacy.org/
 
 For this exercise, we will use spawner-recruit data for sockeye salmon (_Oncorhynchus nerka_) from the Kvichak River in SW Alaska that span the years 1952-1989.  In addition, we'll examine the potential effects of the Pacific Decadal Oscillation (PDO) during the salmon's first year in the ocean, which is widely believed to be a "bottleneck" to survival.
 
-![](images/BB_sockeye_rivers.png)
+![](images/BB_sockeye_rivers_inset.png)
 
 These data are in the **atsalibrary** package on GitHub.  If needed, install  using the **devtools** package.
 ```{r dlm-load-atsa, eval=FALSE}

diff --git a/images/BB_sockeye_rivers_inset.png b/images/BB_sockeye_rivers_inset.png