update guide

toolkit/Makefile

@@ -18,7 +18,7 @@ lib:
 libmpi:
 	cd ..;make lib/librabit_mpi.a;cd -
 
-kmeans.o: kmeans.cpp ../src/*.h
+kmeans.o: kmeans.cc ../src/*.h
 
 # we can link against MPI version to get use MPI
 kmeans.rabit: kmeans.o lib

toolkit/README.md

@@ -1,3 +1,8 @@
 Toolkit
 ====
 This folder contains example toolkit developed using rabit
+
+KMeans
+====
+* Kmeans taks in LIBSVM format
+* You will need a dummy label field at beginning of all the lines to get KMeans

toolkit/toolkit_util.h

@@ -43,7 +43,7 @@ struct SparseMat {
     feat_dim = 0;
     float label; bool init = true;
     char tmp[1024];
-    while (fscanf(file, "%s", tmp) == 1) {
+    while (fscanf(fi, "%s", tmp) == 1) {
       Entry e;
       if (sscanf(tmp, "%u:%f", &e.findex, &e.fvalue) == 2) {
         data.push_back(e);