linux 中将科学计数法转换为数值表示（或将数值转换为科学技术法）

 

001、科学计数法转换为普通数值表示

root@DESKTOP-1N42TVH:/home/test2# ls
a.txt  b.txt
root@DESKTOP-1N42TVH:/home/test2# cat a.txt
4.530733e-01    4.530733e-01
2.264793e-01    2.264793e-01
8.744185e-01    8.744185e-01
5.565876e-01    5.565876e-01
4.296157e-01    4.296157e-01
5.852755e-01    5.852755e-01
8.865728e-01    8.865728e-01
3.353323e-01    3.353323e-01
3.825882e-01    3.825882e-01
root@DESKTOP-1N42TVH:/home/test2# awk '{for(i = 1; i <= NF; i++) {printf("%.7f\t", $i)} {printf("\n")}}' a.txt
0.4530733       0.4530733
0.2264793       0.2264793
0.8744185       0.8744185
0.5565876       0.5565876
0.4296157       0.4296157
0.5852755       0.5852755
0.8865728       0.8865728
0.3353323       0.3353323
0.3825882       0.3825882

 

 

002、普通数值用科学计数法表示

root@DESKTOP-1N42TVH:/home/test2# ls
a.txt
root@DESKTOP-1N42TVH:/home/test2# cat a.txt
0.4530733       0.4530733
0.2264793       0.2264793
0.8744185       0.8744185
0.5565876       0.5565876
0.4296157       0.4296157
0.5852755       0.5852755
0.8865728       0.8865728
0.3353323       0.3353323
0.3825882       0.3825882
root@DESKTOP-1N42TVH:/home/test2# awk '{for(i = 1; i <= NF; i++) {printf("%e\t", $i)} {printf("\n")}}' a.txt
4.530733e-01    4.530733e-01
2.264793e-01    2.264793e-01
8.744185e-01    8.744185e-01
5.565876e-01    5.565876e-01
4.296157e-01    4.296157e-01
5.852755e-01    5.852755e-01
8.865728e-01    8.865728e-01
3.353323e-01    3.353323e-01
3.825882e-01    3.825882e-01