1 files changed, 26 insertions, 0 deletions
diff --git a/gaussian.awk b/gaussian.awk
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index 0000000..ef81b68
--- /dev/null
+++ b/gaussian.awk
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+#!/usr/bin/awk -f
+
+### gaussian.awk
+# generate a Gaussian window
+# https://en.wikipedia.org/wiki/Window_function
+
+BEGIN {
+
+    N = ARGV[1]
+    M = 0.5*(N - 1)
+
+    # sigma <= 0.5
+    sigma = 0.4
+
+    for (n=0; n<N; n++) {
+        if (N > 1 && M > 0) {
+            e[n] = (n - M)/(sigma*M)
+            w[n] = exp(-0.5*e[n]*e[n])
+            print n, w[n]/M
+        }
+        else {
+            print n, 1.0
+        }
+    }
+
+}