pivot heldout csv

eval-logs/pivot_heldout_1782710967.csv

@@ -1,2 +1,3 @@
 ts_unix_s,elapsed_s,phase,docs,tokens,chars,warmup_docs_target,vocab_size,merges,tok_per_s_interval,tok_per_s_cumulative,docs_per_s,prequential_ppl,rolling_ppl,mean_nll,loss,bits_per_token,bits_per_char,bpb,mfu,flops_per_token,token_accuracy,token_accuracy_rolling,top5_accuracy,top5_accuracy_rolling,w_freq,w_bigram,w_trigram,w_skip_bi,w_skip_tri,w_neural_phoneme,w_neural_word,mean_abs_weight_update,word_decoder_l2,phoneme_decoder_l2,embedding_l2
 1782711038,29.736,warmup,200,104412,268969,500,1056,800,3511.29,3511.29,6.726,1055.338227,1056.000000,6.961617,6.961617,10.043490,3.898817,3.884389,0.402478,573120.0,0.999866,1.000000,1.000000,1.000000,18.708984,48.409036,32.766886,28.725284,24.552589,4.998091,4.996154,22.522432,23.190248,29.281914,10.658074
+1782711068,60.503,warmup,400,212295,548155,500,1056,800,3506.50,3508.85,6.611,1055.674471,1056.000000,6.961935,6.962243,10.043949,3.889922,3.875133,0.401929,573120.0,0.999934,1.000000,1.000000,1.000000,12.223331,30.823565,19.984896,17.872857,15.063689,4.997387,4.997382,8.170910,36.883403,45.925801,10.658074