data4a[[1]] looks like this: {{3.09139, 0.035}, {5.478, 0.021}, {5.69607, 5.18}, {4.66533,
0.606}, {5.86113, 4.712}, {3.38675, 0.017}, {4.73539,
0.127}, {4.7015, 0.148}, {3.05943, 0.04}, {2.44535,
0.009}, {2.69424, 0.022}, {3.72215, 2.715}, {5.55842,
0.446}, {3.31166, 0.153}, {6.31493, 21.433}, {2.69637,
0.028}, {2.06691, 0.045}, {6.65424, 0.324}, {2.71539, 0.08}, {2.574,
0.079}, {2.65818, 0.03}, {4.55004, 0.05}, {2.6618,
0.116}, {4.73282, 3.561}, {2.49029, 0.034}, {3.53198,
0.092}, {4.74015, 0.034}, {3.47631, 0.041}, {3.27085,