#FIT_MAXITER = 100
set angles radians
s(x) = a * sin(f* (x/(3.1415*64)) - p ) - o
f = 25
a = 190
o = -513
p = 1
fit s(x) 'dds_test_1.dat' using 1:21 via p,f,a,o
#plot "dds_test_1.dat" using 1:21 with linespoints, s(x)
#pause -1