fid = fopen('./filtered_tennis.trc', 'w');
%prints out the variables in the correct file format
for i = 1:length(BALL_X), fprintf(fid, '%d\t%f\t%f\t%f\t%f\t%f\t%f\t%f\t%f\t%f\t%f\t%f\t%f\t%f\t%f\t%f\t%f\t%f\t%f\t%f\t%f\t%f\t%f\t%f\t%f\t%f\t%f\t%f\t%f\t%f\t%f\t%f\t%f\t%f\t%f\t%f\t%f\t%f\t%f\t%f\t%f\t%f\t%f\t%f\t%f\t%f\t%f\t%f\t%f\t%f\t\n', FRAME(i), TIME(i), R_SH_X_INF(i), R_SH_Y_INF(i), R_SH_Z_INF(i), R_EL_X_INF(i), R_EL_Y_INF(i), R_EL_Y_INF(i), R_WR_X_INF(i), R_WR_Y_INF(i), R_WR_Y_INF(i), RAC_1_X_INF(i), RAC_1_Y_INF(i), RAC_1_Z_INF(i), RAC_2_X_INF(i), RAC_2_Y_INF(i), RAC_2_Z_INF(i), RAC_3_X_INF(i), RAC_3_Y_INF(i), RAC_3_Z_INF(i), L_SH_X_INF(i), L_SH_Y_INF(i), L_SH_Z_INF(i),L_EL_X_INF(i), L_EL_Y_INF(i), L_EL_Z_INF(i),L_WR_X_INF(i), L_WR_Y_INF(i), L_WR_Z_INF(i),R_HIP_X_INF(i), R_HIP_Y_INF(i), R_HIP_Z_INF(i),R_KNEE_X_INF(i), R_KNEE_Y_INF(i), R_KNEE_Z_INF(i),R_ANKLE_X_INF(i), R_ANKLE_Y_INF(i), R_ANKLE_Z_INF(i),L_HIP_X_INF(i), L_HIP_Y_INF(i), L_HIP_Z_INF(i),L_KNEE_X_INF(i), L_KNEE_Y_INF(i), L_KNEE_Z_INF(i),L_ANKLE_X_INF(i), L_ANKLE_Y_INF(i), L_ANKLE_Z_INF(i),BALL_X_INF(i), BALL_Y_INF(i), BALL_Z_INF(i));
end