diff --git a/aux/readvol.r b/aux/readvol.r
new file mode 100644
index 0000000..c98ef01
--- /dev/null
+++ b/aux/readvol.r
@@ -0,0 +1,11 @@
+install.packages({"math","image"})
+use math,numpy
+use math,imager,numpy,plot
+options(digits=4)
+vol = read.np('/tmp/numpy-signal-Txx.npy')
+logg(typeof(vol))
+logg(minMax(vol))
+logg(mean(vol))
+
+logg(minMax(vol[,,10]))
+