c*t
2 楼
1. use "cut" command to get the 3rd column.
2. echo it, so that all white spaces become just one space
3. replace space with " + " using "sed" command to obtain format
in # + # + #
4. evaluate the expression using "expr"
【在 g**c 的大作中提到】
: 我有个文件, 有四列, 我想球第三列所有数的平均值可以吗?
2. echo it, so that all white spaces become just one space
3. replace space with " + " using "sed" command to obtain format
in # + # + #
4. evaluate the expression using "expr"
【在 g**c 的大作中提到】
: 我有个文件, 有四列, 我想球第三列所有数的平均值可以吗?
t*a
3 楼
awk '{t+=$3}END{print t/NR}' filename
【在 c*****t 的大作中提到】
: 1. use "cut" command to get the 3rd column.
: 2. echo it, so that all white spaces become just one space
: 3. replace space with " + " using "sed" command to obtain format
: in # + # + #
: 4. evaluate the expression using "expr"
【在 c*****t 的大作中提到】
: 1. use "cut" command to get the 3rd column.
: 2. echo it, so that all white spaces become just one space
: 3. replace space with " + " using "sed" command to obtain format
: in # + # + #
: 4. evaluate the expression using "expr"
c*t
4 楼
hoho, I wish I knew awk. Too much to learn :(
【在 t*******a 的大作中提到】
: awk '{t+=$3}END{print t/NR}' filename
【在 t*******a 的大作中提到】
: awk '{t+=$3}END{print t/NR}' filename
f*h
5 楼
if you know C and reg expression, you almost know awk:-)
【在 c*****t 的大作中提到】
: hoho, I wish I knew awk. Too much to learn :(
【在 c*****t 的大作中提到】
: hoho, I wish I knew awk. Too much to learn :(
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