diff --git a/omics/kelly/workshop.qmd b/omics/kelly/workshop.qmd
index 4ac230f..697ad89 100644
--- a/omics/kelly/workshop.qmd
+++ b/omics/kelly/workshop.qmd
@@ -227,7 +227,7 @@ View `vfa_delta` to check it looks like `vfa_cummul`
 g/l \* 0.001 \* MW):
 
 ```{r}
-#| echo: false
+
 vfa_delta <- vfa_delta |> 
   left_join(mol_wt, by = "vfa") |>
   mutate(conc_g_l = conc_mM * 0.001 * mw)
diff --git a/renv.lock b/renv.lock
index 6175916..a098a78 100644
--- a/renv.lock
+++ b/renv.lock
@@ -1,6 +1,6 @@
 {
   "R": {
-    "Version": "4.3.1",
+    "Version": "4.3.3",
     "Repositories": [
       {
         "Name": "BioCsoft",
@@ -196,14 +196,14 @@
     },
     "DBI": {
       "Package": "DBI",
-      "Version": "1.1.3",
+      "Version": "1.2.2",
       "Source": "Repository",
-      "Repository": "RSPM",
+      "Repository": "CRAN",
       "Requirements": [
         "R",
         "methods"
       ],
-      "Hash": "b2866e62bab9378c3cc9476a1954226b"
+      "Hash": "164809cd72e1d5160b4cb3aa57f510fe"
     },
     "DESeq2": {
       "Package": "DESeq2",
@@ -336,7 +336,7 @@
     },
     "MASS": {
       "Package": "MASS",
-      "Version": "7.3-60",
+      "Version": "7.3-60.0.1",
       "Source": "Repository",
       "Repository": "CRAN",
       "Requirements": [
@@ -347,15 +347,16 @@
         "stats",
         "utils"
       ],
-      "Hash": "a56a6365b3fa73293ea8d084be0d9bb0"
+      "Hash": "b765b28387acc8ec9e9c1530713cb19c"
     },
     "Matrix": {
       "Package": "Matrix",
-      "Version": "1.5-4.1",
+      "Version": "1.6-5",
       "Source": "Repository",
       "Repository": "CRAN",
       "Requirements": [
         "R",
+        "grDevices",
         "graphics",
         "grid",
         "lattice",
@@ -363,7 +364,7 @@
         "stats",
         "utils"
       ],
-      "Hash": "38082d362d317745fb932e13956dccbb"
+      "Hash": "8c7115cd3a0e048bda2a7cd110549f7a"
     },
     "MatrixGenerics": {
       "Package": "MatrixGenerics",
@@ -427,14 +428,14 @@
     },
     "Rcpp": {
       "Package": "Rcpp",
-      "Version": "1.0.11",
+      "Version": "1.0.12",
       "Source": "Repository",
       "Repository": "RSPM",
       "Requirements": [
         "methods",
         "utils"
       ],
-      "Hash": "ae6cbbe1492f4de79c45fce06f967ce8"
+      "Hash": "5ea2700d21e038ace58269ecdbeb9ec0"
     },
     "RcppArmadillo": {
       "Package": "RcppArmadillo",
@@ -795,7 +796,7 @@
     },
     "callr": {
       "Package": "callr",
-      "Version": "3.7.3",
+      "Version": "3.7.6",
       "Source": "Repository",
       "Repository": "RSPM",
       "Requirements": [
@@ -804,7 +805,7 @@
         "processx",
         "utils"
       ],
-      "Hash": "9b2191ede20fa29828139b9900922e51"
+      "Hash": "d7e13f49c19103ece9e58ad2d83a7354"
     },
     "cellranger": {
       "Package": "cellranger",
@@ -820,14 +821,14 @@
     },
     "cli": {
       "Package": "cli",
-      "Version": "3.6.1",
+      "Version": "3.6.2",
       "Source": "Repository",
       "Repository": "RSPM",
       "Requirements": [
         "R",
         "utils"
       ],
-      "Hash": "89e6d8219950eac806ae0c489052048a"
+      "Hash": "1216ac65ac55ec0058a6f75d7ca0fd52"
     },
     "clipr": {
       "Package": "clipr",
@@ -841,7 +842,7 @@
     },
     "cluster": {
       "Package": "cluster",
-      "Version": "2.1.4",
+      "Version": "2.1.6",
       "Source": "Repository",
       "Repository": "CRAN",
       "Requirements": [
@@ -851,7 +852,7 @@
         "stats",
         "utils"
       ],
-      "Hash": "5edbbabab6ce0bf7900a74fd4358628e"
+      "Hash": "0aaa05204035dc43ea0004b9c76611dd"
     },
     "codetools": {
       "Package": "codetools",
@@ -912,20 +913,6 @@
       ],
       "Hash": "e8a1e41acf02548751f45c718d55aa6a"
     },
-    "credentials": {
-      "Package": "credentials",
-      "Version": "2.0.1",
-      "Source": "Repository",
-      "Repository": "CRAN",
-      "Requirements": [
-        "askpass",
-        "curl",
-        "jsonlite",
-        "openssl",
-        "sys"
-      ],
-      "Hash": "c7844b32098dcbd1c59cbd8dddb4ecc6"
-    },
     "crosstalk": {
       "Package": "crosstalk",
       "Version": "1.2.0",
@@ -1004,19 +991,6 @@
       ],
       "Hash": "043fafb791081fc553f29021bd0a9a01"
     },
-    "desc": {
-      "Package": "desc",
-      "Version": "1.4.3",
-      "Source": "Repository",
-      "Repository": "CRAN",
-      "Requirements": [
-        "R",
-        "R6",
-        "cli",
-        "utils"
-      ],
-      "Hash": "99b79fcbd6c4d1ce087f5c5c758b384f"
-    },
     "digest": {
       "Package": "digest",
       "Version": "0.6.33",
@@ -1313,21 +1287,6 @@
       ],
       "Hash": "15e9634c0fcd294799e9b2e929ed1b86"
     },
-    "gert": {
-      "Package": "gert",
-      "Version": "2.0.0",
-      "Source": "Repository",
-      "Repository": "RSPM",
-      "Requirements": [
-        "askpass",
-        "credentials",
-        "openssl",
-        "rstudioapi",
-        "sys",
-        "zip"
-      ],
-      "Hash": "bbbd21a253d473f4671d7dcbd6d8971f"
-    },
     "ggplot2": {
       "Package": "ggplot2",
       "Version": "3.4.3",
@@ -1369,42 +1328,16 @@
       ],
       "Hash": "e9839af82cc43fda486a638b68b439b2"
     },
-    "gh": {
-      "Package": "gh",
-      "Version": "1.4.0",
-      "Source": "Repository",
-      "Repository": "CRAN",
-      "Requirements": [
-        "R",
-        "cli",
-        "gitcreds",
-        "httr2",
-        "ini",
-        "jsonlite",
-        "rlang"
-      ],
-      "Hash": "03533b1c875028233598f848fda44c4c"
-    },
-    "gitcreds": {
-      "Package": "gitcreds",
-      "Version": "0.1.2",
-      "Source": "Repository",
-      "Repository": "CRAN",
-      "Requirements": [
-        "R"
-      ],
-      "Hash": "ab08ac61f3e1be454ae21911eb8bc2fe"
-    },
     "glue": {
       "Package": "glue",
-      "Version": "1.6.2",
+      "Version": "1.7.0",
       "Source": "Repository",
-      "Repository": "RSPM",
+      "Repository": "CRAN",
       "Requirements": [
         "R",
         "methods"
       ],
-      "Hash": "4f2596dfb05dac67b9dc558e5c6fba2e"
+      "Hash": "e0b3a53876554bd45879e596cdb10a52"
     },
     "googledrive": {
       "Package": "googledrive",
@@ -1609,25 +1542,6 @@
       ],
       "Hash": "ac107251d9d9fd72f0ca8049988f1d7f"
     },
-    "httr2": {
-      "Package": "httr2",
-      "Version": "0.2.3",
-      "Source": "Repository",
-      "Repository": "RSPM",
-      "Requirements": [
-        "R",
-        "R6",
-        "cli",
-        "curl",
-        "glue",
-        "magrittr",
-        "openssl",
-        "rappdirs",
-        "rlang",
-        "withr"
-      ],
-      "Hash": "193bb297368afbbb42dc85784a46b36e"
-    },
     "ids": {
       "Package": "ids",
       "Version": "1.0.1",
@@ -1661,13 +1575,6 @@
       ],
       "Hash": "80401cb5ec513e8ddc56764d03f63669"
     },
-    "ini": {
-      "Package": "ini",
-      "Version": "0.3.1",
-      "Source": "Repository",
-      "Repository": "CRAN",
-      "Hash": "6154ec2223172bce8162d4153cda21f7"
-    },
     "irlba": {
       "Package": "irlba",
       "Version": "2.3.5.1",
@@ -1796,7 +1703,7 @@
     },
     "lattice": {
       "Package": "lattice",
-      "Version": "0.21-8",
+      "Version": "0.22-5",
       "Source": "Repository",
       "Repository": "CRAN",
       "Requirements": [
@@ -1807,7 +1714,7 @@
         "stats",
         "utils"
       ],
-      "Hash": "0b8a6d63c8770f02a8b5635f3c431e6b"
+      "Hash": "7c5e89f04e72d6611c77451f6331a091"
     },
     "lazyeval": {
       "Package": "lazyeval",
@@ -1821,16 +1728,16 @@
     },
     "lifecycle": {
       "Package": "lifecycle",
-      "Version": "1.0.3",
+      "Version": "1.0.4",
       "Source": "Repository",
-      "Repository": "RSPM",
+      "Repository": "CRAN",
       "Requirements": [
         "R",
         "cli",
         "glue",
         "rlang"
       ],
-      "Hash": "001cecbeac1cff9301bdc3775ee46a86"
+      "Hash": "b8552d117e1b808b09a832f589b79035"
     },
     "limma": {
       "Package": "limma",
@@ -1912,7 +1819,7 @@
     },
     "mgcv": {
       "Package": "mgcv",
-      "Version": "1.8-42",
+      "Version": "1.9-1",
       "Source": "Repository",
       "Repository": "CRAN",
       "Requirements": [
@@ -1925,7 +1832,7 @@
         "stats",
         "utils"
       ],
-      "Hash": "3460beba7ccc8946249ba35327ba902a"
+      "Hash": "110ee9d83b496279960e162ac97764ce"
     },
     "mime": {
       "Package": "mime",
@@ -1968,7 +1875,7 @@
     },
     "nlme": {
       "Package": "nlme",
-      "Version": "3.1-162",
+      "Version": "3.1-164",
       "Source": "Repository",
       "Repository": "CRAN",
       "Requirements": [
@@ -1978,7 +1885,7 @@
         "stats",
         "utils"
       ],
-      "Hash": "0984ce8da8da9ead8643c5cbbb60f83e"
+      "Hash": "a623a2239e642806158bc4dc3f51565d"
     },
     "openssl": {
       "Package": "openssl",
@@ -2113,16 +2020,17 @@
     },
     "progress": {
       "Package": "progress",
-      "Version": "1.2.2",
+      "Version": "1.2.3",
       "Source": "Repository",
-      "Repository": "RSPM",
+      "Repository": "CRAN",
       "Requirements": [
+        "R",
         "R6",
         "crayon",
         "hms",
         "prettyunits"
       ],
-      "Hash": "14dc9f7a3c91ebb14ec5bb9208a07061"
+      "Hash": "f4625e061cb2865f111b47ff163a5ca6"
     },
     "promises": {
       "Package": "promises",
@@ -2196,9 +2104,9 @@
     },
     "readr": {
       "Package": "readr",
-      "Version": "2.1.4",
+      "Version": "2.1.5",
       "Source": "Repository",
-      "Repository": "RSPM",
+      "Repository": "CRAN",
       "Requirements": [
         "R",
         "R6",
@@ -2215,7 +2123,7 @@
         "utils",
         "vroom"
       ],
-      "Hash": "b5047343b3825f37ad9d3b5d89aa1078"
+      "Hash": "9de96463d2117f6ac49980577939dfb3"
     },
     "readxl": {
       "Package": "readxl",
@@ -2272,9 +2180,9 @@
     },
     "reprex": {
       "Package": "reprex",
-      "Version": "2.0.2",
+      "Version": "2.1.0",
       "Source": "Repository",
-      "Repository": "RSPM",
+      "Repository": "CRAN",
       "Requirements": [
         "R",
         "callr",
@@ -2290,7 +2198,7 @@
         "utils",
         "withr"
       ],
-      "Hash": "d66fe009d4c20b7ab1927eb405db9ee2"
+      "Hash": "1425f91b4d5d9a8f25352c44a3d914ed"
     },
     "reshape2": {
       "Package": "reshape2",
@@ -2307,18 +2215,18 @@
     },
     "rlang": {
       "Package": "rlang",
-      "Version": "1.1.1",
+      "Version": "1.1.3",
       "Source": "Repository",
       "Repository": "RSPM",
       "Requirements": [
         "R",
         "utils"
       ],
-      "Hash": "a85c767b55f0bf9b7ad16c6d7baee5bb"
+      "Hash": "42548638fae05fd9a9b5f3f437fbbbe2"
     },
     "rmarkdown": {
       "Package": "rmarkdown",
-      "Version": "2.25",
+      "Version": "2.26",
       "Source": "Repository",
       "Repository": "RSPM",
       "Requirements": [
@@ -2331,24 +2239,13 @@
         "jsonlite",
         "knitr",
         "methods",
-        "stringr",
         "tinytex",
         "tools",
         "utils",
         "xfun",
         "yaml"
       ],
-      "Hash": "d65e35823c817f09f4de424fcdfa812a"
-    },
-    "rprojroot": {
-      "Package": "rprojroot",
-      "Version": "2.0.4",
-      "Source": "Repository",
-      "Repository": "RSPM",
-      "Requirements": [
-        "R"
-      ],
-      "Hash": "4c8415e0ec1e29f3f4f6fc108bef0144"
+      "Hash": "9b148e7f95d33aac01f31282d49e4f44"
     },
     "rstudioapi": {
       "Package": "rstudioapi",
@@ -2370,9 +2267,9 @@
     },
     "rvest": {
       "Package": "rvest",
-      "Version": "1.0.3",
+      "Version": "1.0.4",
       "Source": "Repository",
-      "Repository": "RSPM",
+      "Repository": "CRAN",
       "Requirements": [
         "R",
         "cli",
@@ -2383,10 +2280,9 @@
         "rlang",
         "selectr",
         "tibble",
-        "withr",
         "xml2"
       ],
-      "Hash": "a4a5ac819a467808c60e36e92ddf195e"
+      "Hash": "0bcf0c6f274e90ea314b812a6d19a519"
     },
     "sass": {
       "Package": "sass",
@@ -2404,21 +2300,23 @@
     },
     "scales": {
       "Package": "scales",
-      "Version": "1.2.1",
+      "Version": "1.3.0",
       "Source": "Repository",
-      "Repository": "RSPM",
+      "Repository": "CRAN",
       "Requirements": [
         "R",
         "R6",
         "RColorBrewer",
+        "cli",
         "farver",
+        "glue",
         "labeling",
         "lifecycle",
         "munsell",
         "rlang",
         "viridisLite"
       ],
-      "Hash": "906cb23d2f1c5680b8ce439b44c6fa63"
+      "Hash": "c19df082ba346b0ffa6f833e92de34d1"
     },
     "scran": {
       "Package": "scran",
@@ -2570,22 +2468,22 @@
     },
     "stringi": {
       "Package": "stringi",
-      "Version": "1.7.12",
+      "Version": "1.8.3",
       "Source": "Repository",
-      "Repository": "RSPM",
+      "Repository": "CRAN",
       "Requirements": [
         "R",
         "stats",
         "tools",
         "utils"
       ],
-      "Hash": "ca8bd84263c77310739d2cf64d84d7c9"
+      "Hash": "058aebddea264f4c99401515182e656a"
     },
     "stringr": {
       "Package": "stringr",
-      "Version": "1.5.0",
+      "Version": "1.5.1",
       "Source": "Repository",
-      "Repository": "RSPM",
+      "Repository": "CRAN",
       "Requirements": [
         "R",
         "cli",
@@ -2596,7 +2494,7 @@
         "stringi",
         "vctrs"
       ],
-      "Hash": "671a4d384ae9d32fc47a14e98bfa3dc8"
+      "Hash": "960e2ae9e09656611e0b8214ad543207"
     },
     "sys": {
       "Package": "sys",
@@ -2649,9 +2547,9 @@
     },
     "tidyr": {
       "Package": "tidyr",
-      "Version": "1.3.0",
+      "Version": "1.3.1",
       "Source": "Repository",
-      "Repository": "RSPM",
+      "Repository": "CRAN",
       "Requirements": [
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         "cli",
@@ -2668,7 +2566,7 @@
         "utils",
         "vctrs"
       ],
-      "Hash": "e47debdc7ce599b070c8e78e8ac0cfcf"
+      "Hash": "915fb7ce036c22a6a33b5a8adb712eb1"
     },
     "tidyselect": {
       "Package": "tidyselect",
@@ -2728,14 +2626,14 @@
     },
     "timechange": {
       "Package": "timechange",
-      "Version": "0.2.0",
+      "Version": "0.3.0",
       "Source": "Repository",
-      "Repository": "RSPM",
+      "Repository": "CRAN",
       "Requirements": [
         "R",
         "cpp11"
       ],
-      "Hash": "8548b44f79a35ba1791308b61e6012d7"
+      "Hash": "c5f3c201b931cd6474d17d8700ccb1c8"
     },
     "tinytex": {
       "Package": "tinytex",
@@ -2778,46 +2676,15 @@
       ],
       "Hash": "f561504ec2897f4d46f0c7657e488ae1"
     },
-    "usethis": {
-      "Package": "usethis",
-      "Version": "2.2.2",
-      "Source": "Repository",
-      "Repository": "RSPM",
-      "Requirements": [
-        "R",
-        "cli",
-        "clipr",
-        "crayon",
-        "curl",
-        "desc",
-        "fs",
-        "gert",
-        "gh",
-        "glue",
-        "jsonlite",
-        "lifecycle",
-        "purrr",
-        "rappdirs",
-        "rlang",
-        "rprojroot",
-        "rstudioapi",
-        "stats",
-        "utils",
-        "whisker",
-        "withr",
-        "yaml"
-      ],
-      "Hash": "60e51f0b94d0324dc19e44110098fa9f"
-    },
     "utf8": {
       "Package": "utf8",
-      "Version": "1.2.3",
+      "Version": "1.2.4",
       "Source": "Repository",
-      "Repository": "RSPM",
+      "Repository": "CRAN",
       "Requirements": [
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       ],
-      "Hash": "1fe17157424bb09c48a8b3b550c753bc"
+      "Hash": "62b65c52671e6665f803ff02954446e9"
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     "uuid": {
       "Package": "uuid",
@@ -2920,13 +2787,6 @@
       ],
       "Hash": "16858ee1aba97f902d24049d4a44ef16"
     },
-    "whisker": {
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-      "Version": "0.4.1",
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-      "Repository": "CRAN",
-      "Hash": "c6abfa47a46d281a7d5159d0a8891e88"
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     "withr": {
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       "Version": "2.5.1",
@@ -2964,17 +2824,10 @@
     },
     "yaml": {
       "Package": "yaml",
-      "Version": "2.3.7",
+      "Version": "2.3.8",
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-      "Repository": "RSPM",
-      "Hash": "0d0056cc5383fbc240ccd0cb584bf436"
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-    "zip": {
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-      "Source": "Repository",
-      "Repository": "RSPM",
-      "Hash": "d98c94dacb7e0efcf83b0a133a705504"
+      "Repository": "CRAN",
+      "Hash": "29240487a071f535f5e5d5a323b7afbd"
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     "zlibbioc": {
       "Package": "zlibbioc",