Adding data from a file based on some condition

Shell Programming and Scripting
1

I collect data in a file in below format(Month Day Year Size) in RedHat Linux. Now i want to calculate the data size date wise. As i code shell script after long time, i forgot the features and syntax. Can anyone help me regard this please.

Feb 8 2014 15
Feb 10 2014 32
Feb 10 2014 32
Feb 12 2014 15
Feb 12 2014 15

---------- Post updated at 11:24 AM ---------- Previous update was at 10:57 AM ----------

Data collected for only 5 days. So, i have to calculate with more data (for single day, may be 5-10 entry)

---------- Post updated at 11:48 AM ---------- Previous update was at 11:24 AM ----------

Output format will be like this:

Feb 8 2014 15
Feb 10 2014 64
Feb 12 2014 30
2

Try :

[akshay@aix tmp]$ cat file
Feb 8 2014 15
Feb 10 2014 32
Feb 10 2014 32
Feb 12 2014 15
Feb 12 2014 15

[akshay@aix tmp]$ awk 'FNR==NR{A[$1 FS $2 FS $3]+=$4;next}{f=(($1 FS $2 FS $3) in A)}f{$4 = A[$1 FS $2 FS $3];delete A[$1 FS $2 FS $3]}f' file file
Feb 8 2014 15
Feb 10 2014 64
Feb 12 2014 30

---------- Post updated at 12:30 PM ---------- Previous update was at 12:27 PM ----------

If order doesn't matter try this

[akshay@aix tmp]$ awk '{A[$1 FS $2 FS $3]+=$4}END{for(i in A)print i,A}' file
Feb 12 2014 30
Feb 10 2014 64
Feb 8 2014 15
3

If dates are grouped together try:

awk '{v=$NF; $NF=x; i=$0} i!=p{if(p)print p t; p=i; t=0} {t+=v} END{print p t}' file