compile bug fix

JiaweiZhuang · Apr 29, 2017 · 0e45d12 · 0e45d12
1 parent 4f5c7a0
commit 0e45d12
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Showing 3 changed files with 8 additions and 7 deletions.
diff --git a/Parallel_Algorithm/MPI/compile.sh b/Parallel_Algorithm/MPI/compile.sh
@@ -1 +1 @@
-mpicc -o Kmean_mpi.out -O2 -std=c99 -lnetcdf -fopenmp -lpthread ../shared/make_2D_array.c ../shared/ncdf_util.c ../shared/math_util.c Kmean_mpi.c 
+mpicc -o Kmean_mpi.out -O2 -std=c99 -lm -lnetcdf -fopenmp -lpthread ../shared/make_2D_array.c ../shared/ncdf_util.c ../shared/math_util.c Kmean_mpi.c 
diff --git a/Parallel_Algorithm/OpenMP/compile.sh b/Parallel_Algorithm/OpenMP/compile.sh
@@ -1,4 +1,4 @@
-gcc -o Kmean_omp.out -O2 -std=c99 -lnetcdf -fopenmp -lpthread ../shared/make_2D_array.c ../shared/ncdf_util.c ../shared/math_util.c Kmean_omp.c 
+gcc -o Kmean_omp.out -O2 -std=c99 -lm -lnetcdf -fopenmp -lpthread ../shared/make_2D_array.c ../shared/ncdf_util.c ../shared/math_util.c Kmean_omp.c 
 
 #For debugging with gdb
 #gcc -g -O0 -std=c99 -lnetcdf Kmean_seq.c -o Kmean_seq.out
diff --git a/Parallel_Algorithm/shared/math_util.c b/Parallel_Algorithm/shared/math_util.c
@@ -1,3 +1,4 @@
+#include <math.h>
 #include "math_util.h"
 
 // square of the distance between x1[N_features] and x2[N_features]
@@ -11,11 +12,11 @@ float distance(int N_features,float *x1,float *x2){
 float correlation(int N_features,float *x,float *y){
    float xsum=0.0,ysum=0.0,xysum=0.0,xsqr_sum=0.0,ysqr_sum=0.0;
    for (int j = 0; j<N_features; j++) {
-            xsum = xsum + x[i];
-            ysum = ysum + y[i];
-            xysum = xysum + x[i] * y[i];
-            xsqr_sum = xsqr_sum + x[i] * x[i];
-            ysqr_sum = ysqr_sum + y[i] * y[i];
+            xsum = xsum + x[j];
+            ysum = ysum + y[j];
+            xysum = xysum + x[j] * y[j];
+            xsqr_sum = xsqr_sum + x[j] * x[j];
+            ysqr_sum = ysqr_sum + y[j] * y[j];
     }
 
     float num = ((N_features * xysum) - (xsum * ysum));