X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=src%2Fmath%2Fts%2Finnovations.c;h=3ab2f3edce165ed0a709688e711867986683eee3;hb=b5c82cc9aabe7e641011130240ae1b2e84348e23;hp=553e20e8f7953a879595c3ddb0dce2e0e715b1dc;hpb=4aa40ed36fcdb13f73520945d804e6d3d8d52738;p=pspp-builds.git

diff --git a/src/math/ts/innovations.c b/src/math/ts/innovations.c
index 553e20e8..3ab2f3ed 100644
--- a/src/math/ts/innovations.c
+++ b/src/math/ts/innovations.c
@@ -26,10 +26,14 @@
  */
 
 #include <config.h>
+
+#include <math.h>
+#include <stdlib.h>
+
 #include <gsl/gsl_matrix.h>
 #include <gsl/gsl_vector.h>
-#include <stdlib.h>
 #include <libpspp/compiler.h>
+#include <libpspp/misc.h>
 #include <math/coefficient.h>
 #include <math/ts/innovations.h>
 
@@ -160,7 +164,7 @@ innovations_update_scale (struct innovations_estimate *est, double *theta,
       for (j = 0; j < i; j++)
 	{
 	  k = i - j - 1;
-	  result -= theta[k] * theta[k] * est->scale[j];
+	  result -= pow2 (theta[k]) * est->scale[j];
 	}
       est->scale[i] = result;
     }