plot'log_exp_Sparse.txt' index 0 using 1:4 t "Sparse polynomial No log.exp" with linespoints ls 2,\
'log_exp_Sparse.txt' index 0 using 1:2 t "Sparse polynomial with log.exp" with linespoints ls 1,\
'log_exp_Sparse.txt' index 1 using 1:2 t "Sparse polynomial with log.exp" with linespoints ls 1,\
'log_exp.txt' index 0 using 1:4 t "Full polynomial No log.exp" with linespoints ls 2,\
plot'log_exp_Sparse.txt' index 0 using 1:4 t "Sparse polynomial No log.exp" with linespoints ls 2,\
'log_exp_Sparse.txt' index 0 using 1:2 t "Sparse polynomial with log.exp" with linespoints ls 1,\
'log_exp_Sparse.txt' index 1 using 1:2 t "Sparse polynomial with log.exp" with linespoints ls 1,\
'log_exp.txt' index 0 using 1:4 t "Full polynomial No log.exp" with linespoints ls 2,\