add abs()

bmarechal
1 parent b3b851a23e
Showing 1 changed file with 1 additions and 1 deletions Side-by-side Diff
allan_cov.m
@@ -328,7 +328,7 @@
         fd2=diff(fa2);
         % calculate two-sample variance for this tau
         M=length(fa);
-        sm(k)=sqrt(0.5/(M-1)*(sum(fd.*fd2)));
+        sm(k)=sqrt(0.5/(M-1)*(abs(sum(fd.*fd2))));
  
         % estimate error bars
         sme(k)=sm(k)/sqrt(M+1);
...	...	@@ -328,7 +328,7 @@
328	328	fd2=diff(fa2);
329	329	% calculate two-sample variance for this tau
330	330	M=length(fa);
331		- sm(k)=sqrt(0.5/(M-1)(sum(fd.fd2)));
	331	+ sm(k)=sqrt(0.5/(M-1)(abs(sum(fd.fd2))));
332	332
333	333	% estimate error bars
334	334	sme(k)=sm(k)/sqrt(M+1);