diff --git a/psdplot.m b/psdplot.m
new file mode 100755
index 0000000..5ec39d1
--- /dev/null
+++ b/psdplot.m
@@ -0,0 +1,23 @@
+#!/usr/bin/octave-cli --persist
+
+filename = argv(){1};
+col = eval(argv(){2});
+mult = eval(argv(){3});
+
+if length(col) == length(mult)
+    figure
+    hold all
+    grid on
+    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)));
+        hold on
+    end
+    legend(leg)
+    input("Press to continue...");
+end
+exit