diff --git a/samples/dataset.cc b/samples/dataset.cc
index e6b23c6..4b50b0e 100644
--- a/samples/dataset.cc
+++ b/samples/dataset.cc
@@ -138,16 +138,7 @@ void Dataset::SaveMotionData(const api::MotionData &data) {
                 << data.imu->gyro[2] << ", " << data.imu->temperature
                 << std::endl;
 
-                
-  if (data.imu->flag == 1 || data.imu->flag == 2) {
-    writer->ofs << seq << ", " << static_cast<int>(data.imu->flag) << ", "
-                << data.imu->timestamp << ", " << data.imu->accel[0] << ", "
-                << data.imu->accel[1] << ", " << data.imu->accel[2] << ", "
-                << data.imu->gyro[0] << ", " << data.imu->gyro[1] << ", "
-                << data.imu->gyro[2] << ", " << data.imu->temperature
-                << std::endl;
-    
-  }
+  motion_count_++;
   /*
   if(motion_count_ != seq) {
     LOG(INFO) << "motion_count_ != seq !" << " motion_count_: " << motion_count_