diff --git a/psdplot.m b/psdplot.m
index b51dab4..564020e 100755
--- a/psdplot.m
+++ b/psdplot.m
@@ -3,6 +3,7 @@
 filename = argv(){1};
 col = eval(argv(){2});
 mult = eval(argv(){3});
+data.rate = eval(argv(){4});
 
 if length(col) == length(mult)
 	figure
@@ -11,7 +12,6 @@ if length(col) == length(mult)
 	cc = 'bkcgmry';
 	for i = [1:length(col)]
 		data.freq = load(filename)(:,col(i)).*mult(i);
-		data.rate = 1;
 		[p, f] = pwelch(data.freq, [], 0.95, [], data.rate.*mult(i), 'onesided');
 		semilogx(f, 10*log10(p), cc(mod(i, length(cc))))
 		leg{i} = strcat(filename, ' col', num2str(col(i)));