nag_sum_fft_qtrcosine (c06rhc) Example Program Results Original data values 0.3854 0.6772 0.1138 0.6751 0.6362 0.1424 0.5417 0.2983 0.1181 0.7255 0.8638 0.8723 0.9172 0.0644 0.6037 0.6430 0.0428 0.4815 Discrete quarter-wave Fourier cosine transforms 0.7257 -0.2216 0.1011 0.2355 -0.1406 -0.2282 0.7479 -0.6172 0.4112 0.0791 0.1331 -0.0906 0.6713 -0.1363 -0.0064 -0.0285 0.4758 0.1475 Original data as restored by inverse transform 0.3854 0.6772 0.1138 0.6751 0.6362 0.1424 0.5417 0.2983 0.1181 0.7255 0.8638 0.8723 0.9172 0.0644 0.6037 0.6430 0.0428 0.4815