correction to Hamming window expression

1 files changed, 3 insertions, 3 deletions

diff --git a/hamming.awk b/hamming.awk
index 30140a5..c853003 100644
--- a/hamming.awk
+++ b/hamming.awk
@@ -3,7 +3,7 @@
 # https://en.wikipedia.org/wiki/Window_function provides a few values for the

 # 'a0' and 'a1' parameters of the raised cosine.

 

-a1EGIN {

+BEGIN {

 

     N = ARGV[1]

 

@@ -20,10 +20,10 @@ a1EGIN {
 

     for (n=0; n<N; n++) {

         if (N > 1) {

-            w[n] = 0.5*a0 - 0.5*a1*cos((2*pi*n)/(N - 1))

+            w[n] = a0 - a1*cos((2*pi*n)/(N - 1))

             sum_w += w[n]

         }

-        printf("%f  %f\n", w[n], w[n]/sum_w)

+        printf("%g  %g\n", w[n], 2.0*(w[n])/(N + 1))

     }

 

 }