From 5901f1007aa60bcd5e8b8850283d045f3c79b24b Mon Sep 17 00:00:00 2001
From: Rahix <rahix@rahix.de>
Date: Sat, 14 Sep 2024 21:39:36 +0200
Subject: [PATCH] Add gnuplot script for plotting pressure curves

---
 logs/README.md             | 8 ++++++++
 logs/plot-pressure.gnuplot | 6 ++++++
 2 files changed, 14 insertions(+)
 create mode 100644 logs/plot-pressure.gnuplot

diff --git a/logs/README.md b/logs/README.md
index 6f9d000..8f4f4b9 100644
--- a/logs/README.md
+++ b/logs/README.md
@@ -15,3 +15,11 @@ Pumpdown curve: elapsed (seconds, float) and mbar.
 To acquire: `python3 acquire.py` and give it a tag/comment to stdin. Then press the pumpdown button or turn the scope on.
 
 Elapsed is 0 at the moment the script detected a pumpdown event.
+
+## Plotting with `gnuplot`
+You can use the `plot-pressure.gnuplot` script to plot the pressure graphs.  Use it like this:
+
+```terminal
+$ gnuplot
+gnuplot> load "plot-pressure.gnuplot"
+```
diff --git a/logs/plot-pressure.gnuplot b/logs/plot-pressure.gnuplot
new file mode 100644
index 0000000..f7cf8c7
--- /dev/null
+++ b/logs/plot-pressure.gnuplot
@@ -0,0 +1,6 @@
+FILES = system("ls -1 pressure-*.csv")
+LABEL = system("ls -1 pressure-*.csv | sed 's/pressure-\\(.*\\)\\..*/\\1/'")
+
+set logscale y
+
+plot for [i=1:words(FILES)] word(FILES,i) using 1:2 title word(LABEL,i) with lines