question: private void blackmanHarris4s ( int size ) { int start = ( windowFunction . length - size ) / 2 ; int stop = ( windowFunction . length + size ) / 2 ; double scale = 1.0 / ( double ) size / 0.4 ; for ( int i = 0 ; start < stop ; start ++ , i ++ ) windowFunction [ i ] = scale * ( 0.40217 - 0.49703 * Math . cos ( twoPI * i / size ) + 0.09392 * Math . cos ( 2 * twoPI * i / size ) - 0.00183 * Math . cos ( 3 * twoPI * i / size ) ) ; }
target:  Fill an array with the values of a 74-dB 4-sample Blackman-Harris window function