From 46915b1fac722fd9e00341c834e12c29c9300a5f Mon Sep 17 00:00:00 2001
From: Pjotr Prins
Date: Sat, 25 May 2024 09:27:23 -0500
Subject: Hashing in guile

---
 topics/data/precompute/steps.gmi | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/topics/data/precompute/steps.gmi b/topics/data/precompute/steps.gmi
index dd07c0f..33915cd 100644
--- a/topics/data/precompute/steps.gmi
+++ b/topics/data/precompute/steps.gmi
@@ -62,4 +62,15 @@ At this point we can write
 {"2":9.40338,"3":10.196,"4":10.1093,"5":9.42362,"6":9.8285,"7":10.0808,"8":9.17844,"9":10.1527,"10":10.1167,"11":9.88551,"13":9.58127,"15":9.82312,"17":9.88005,"19":10.0761,"20":10.2739,"21":9.54171,"22":10.1056,"23":10.5702,"25":10.1433,"26":9.68685,"28":9.98464,"29":10.132,"30":9.96049,"31":10.2055,"35":10.1406,"36":9.94794,"37":9.96864,"39":9.31048}
 ```
 
-Note that it (potentially) includes the parents. Also the strain-id is a string and we may want to plug in the strain name. To allow for easy comparison downstream. Finally we may want to store a checksum of sorts. In the next step we have to check the normal distribution of the trait values and maybe winsorize outliers.
+Note that it (potentially) includes the parents. Also the strain-id is a string and we may want to plug in the strain name. To allow for easy comparison downstream. Finally we may want to store a checksum of sorts. In Guile this can be achieved with:
+
+```scheme
+(use-modules  (rnrs bytevectors)
+              (hashing sha-2))
+
+(sha-256->string (sha-256 #vu8(1 53 204)))
+```
+
+from guile-hashing and guile-gcrypt modules.
+
+In the next step we have to check the normal distribution of the trait values and maybe winsorize outliers.
-- 
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