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Fill in missing Data

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Top Forums Shell Programming and Scripting Fill in missing Data
# 22  
Old 03-20-2012
Quote:
Originally Posted by Corona688
What threw me is you showed what you wanted like "a,,c", filling in b inbetween. That had me thinking you wanted it filled in between the same rows, which of course makes no sense -- server b's data has nothing to do with a's or c's. But if you wanted extrapolation based on past data for that column, that makes more sense.

Here's some interpolation across rows. It has to load the whole dataset into memory though.

Code:
$ cat fill2.awk
 
BEGIN { FS="," ; OFS="," }
 
{       COLS=NF
        for(N=1; N<=NF; N++)    D[NR,N]=$N      }
 
END {
        for(N=2; N<=COLS; N++)
        {
#               printf("column %d\n", N);
 
                S=1
                for(L=1; L<=NR; L++)
                {
                        if(!D[L,N]) continue;
 
                        if(((L-S) < 2) || (!D[S,N]))
                        {
                                S=L;
                                continue;
                        }
 
#                       printf("[%s]", D[S,N]);
 
                        SLOPE=(D[L,N]-D[S,N])/(L-S);
 
                        for(M=S+1; M<L; M++)
                        {
                                X=M-S
                                D[M,N]=D[S,N]+(SLOPE*X);
#                               printf("\t'%s'", D[M,N]);
                        }
 
#                       printf("\t[%s]\n", D[L,N]);
 
                        S=L;
                }
        }
 
        for(L=1; L<=NR; L++)
        {
                printf("%s", D[L, 1]);
 
                for(N=2; N<=COLS; N++)  printf(OFS "%s", D[L,N]);
 
                printf("\n");
        }
}
 
$ awk -f fill2.awk data
 
Wed Feb 01 09:00:02 EST 2012,,,0.4,0.3,,0.3,,0.3,,0.5,,0.3,,,0.4,0.3,
Wed Feb 01 09:00:11 EST 2012,,,0.45,0.35,,0.35,0.2,0.35,,0.55,,0.35,,,0.45,0.35,
Wed Feb 01 09:00:22 EST 2012,0.7,0.4,0.5,0.4,0.3,0.4,,0.4,0.5,0.6,0.3,0.4,,0.1,0.5,0.4,
Wed Feb 01 09:00:42 EST 2012,0.9,1.0,0.6,0.5,0.366667,0.5,,0.433333,0.55,0.625,0.325,0.5,,,0.525,0.425,
Wed Feb 01 09:01:02 EST 2012,1.0,0.8,0.65,0.55,0.433333,0.6,,0.466667,0.6,0.65,0.35,0.6,,,0.55,0.45,
Wed Feb 01 09:01:22 EST 2012,0.95,0.7,0.7,0.6,0.5,,,0.5,0.65,0.675,0.375,0.55,,,0.575,0.475,
Wed Feb 01 09:01:42 EST 2012,0.9,0.6,0.6,0.5,,,,0.4,0.7,0.7,0.4,0.5,,,0.6,0.5,
Wed Feb 01 09:02:02 EST 2012,0.8,,0.5,0.4,,,,1.1,,0.65,0.3,0.4,,,,,
Wed Feb 01 09:02:22 EST 2012,0.9,,,,,,,0.7,,0.6,,,,,,,
 
$

It's still full of holes like swiss cheese wherever there was only one end to the data...

Tried the script out but was getting the following errors...

Code:
./awk.awk: line 1: BEGIN: command not found
: command not found}
: command not found
./awk.awk: line 4: syntax error near unexpected token `('
'/awk.awk: line 4: `        for(N=1; N<=NF; N++)    D[NR,N]=$N      }

# 23  
Old 03-20-2012
I've never heard of an awk that doesn't even have begin! I think the file got mangled between you copying it and running it somehow.

You are running it in awk, yes? Not as a shell script? Run it as I showed you -- awk -f filename.awk datafile

Also, try nawk; it could be version incompatibilities but I doubt it.
# 24  
Old 03-21-2012
i ran it just like you said. gave me a lot of syntax errors....

Code:
-bash-3.2$ awk -f awk.awk file.csv
awk: awk.awk:7:         for(N=2; N<=COLS; N++)
awk: awk.awk:7:         ^ syntax error
awk: awk.awk:7:         for(N=2; N<=COLS; N++)
awk: awk.awk:7:                ^ syntax error
awk: awk.awk:7:         for(N=2; N<=COLS; N++)
awk: awk.awk:7:                         ^ syntax error
awk: awk.awk:8:         for(N=2; N<=COLS; N++)
awk: awk.awk:8:                                ^ unexpected newline or end of string
awk: awk.awk:12:                 S=1
awk: awk.awk:12:                     ^ unexpected newline or end of string
awk: awk.awk:12:                 for(L=1; L<=NR; L++)
awk: awk.awk:12:                        ^ syntax error
awk: awk.awk:12:                 for(L=1; L<=NR; L++)
awk: awk.awk:12:                               ^ syntax error
awk: awk.awk:13:                 for(L=1; L<=NR; L++)
awk: awk.awk:13:                                      ^ unexpected newline or end of string
awk: awk.awk:14:                         if(!D[L,N]) continue;
awk: awk.awk:14:                                     ^ syntax error
awk: awk.awk:17:                         if(((L-S) < 2) || (!D[S,N]))
awk: awk.awk:17:                                                      ^ unexpected newline or end of string
awk: awk.awk:18:                                 S=L;
awk: awk.awk:18:                                    ^ syntax error
awk: awk.awk:24:                         SLOPE=(D[L,N]-D[S,N])/(L-S);
awk: awk.awk:24:                                                    ^ syntax error
awk: awk.awk:26:                         for(M=S+1; M<L; M++)
awk: awk.awk:26:                                  ^ syntax error
awk: awk.awk:26:                         for(M=S+1; M<L; M++)
awk: awk.awk:26:                                       ^ syntax error
awk: awk.awk:27:                         for(M=S+1; M<L; M++)
awk: awk.awk:27:                                              ^ unexpected newline or end of string
awk: awk.awk:29:                                 X=M-S
awk: awk.awk:29:                                       ^ unexpected newline or end of string
awk: awk.awk:29:                                 D[M,N]=D[S,N]+(SLOPE*X);
awk: awk.awk:29:                                                        ^ syntax error
awk: awk.awk:35:                         S=L;
awk: awk.awk:35:                            ^ syntax error
awk: awk.awk:39:         for(L=1; L<=NR; L++)
awk: awk.awk:39:                ^ syntax error
awk: awk.awk:39:         for(L=1; L<=NR; L++)
awk: awk.awk:39:                       ^ syntax error
awk: awk.awk:40:         for(L=1; L<=NR; L++)
awk: awk.awk:40:                              ^ unexpected newline or end of string
awk: awk.awk:41:                 printf("%s", D[L, 1]);
awk: awk.awk:41:                                      ^ syntax error
awk: awk.awk:43:                 for(N=2; N<=COLS; N++)  printf(OFS "%s", D[L,N]);
awk: awk.awk:43:                        ^ syntax error
awk: awk.awk:43:                 for(N=2; N<=COLS; N++)  printf(OFS "%s", D[L,N]);
awk: awk.awk:43:                                 ^ syntax error
awk: awk.awk:43:                 for(N=2; N<=COLS; N++)  printf(OFS "%s", D[L,N]);
awk: awk.awk:43:                                         ^ syntax error
awk: awk.awk:43:                 for(N=2; N<=COLS; N++)  printf(OFS "%s", D[L,N]);
awk: awk.awk:43:                                                                 ^ syntax error
awk: awk.awk:45:                 printf("\n");
awk: awk.awk:45:                             ^ syntax error

---------- Post updated at 08:47 AM ---------- Previous update was at 08:43 AM ----------

i recreated the file within shell and i think its now working

---------- Post updated at 09:45 AM ---------- Previous update was at 08:47 AM ----------

everything works like a charm. Thank you for the help!!
This User Gave Thanks to Mikes88 For This Post:
Corona688
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