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http://www.netanya.ac.il/ahmad1 יסודות מערכות פתוחות ג ' בארה אחמד המכללה האקדמית נתניה The Awk Utility
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http://www.netanya.ac.il/ahmad2 The Awk Utility – example1 {print $0} p1 Yosi 12345 70 80 45 17 Ron 65432 90 72 65 Rami 52312 76 98 13 87 16 Dana 54321 37 64 87 100 f1 > awk -f p1 f1 הפעלה Yosi 12345 70 80 45 17 Ron 65432 90 72 65 Rami 52312 76 98 13 87 16 Dana 54321 37 64 87 100 פלט
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http://www.netanya.ac.il/ahmad3 The Awk Utility – example2 {print $1,$3} p1 Yosi 12345 70 80 45 17 Ron 65432 90 72 65 Rami 52312 76 98 13 87 16 Dana 54321 37 64 87 100 f1 > awk -f p1 f1 הפעלה Yosi 70 Ron 90 Rami 76 Dana 37 פלט
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http://www.netanya.ac.il/ahmad4 The Awk Utility – example3 {print FNR,NF,$0} p1 Yosi 12345 70 80 45 17 Ron 65432 90 72 65 Rami 52312 76 98 13 87 16 Dana 54321 37 64 87 100 f1 > awk -f p1 f1 הפעלה 1 6 Yosi 12345 70 80 45 17 2 5 Ron 65432 90 72 65 3 7 Rami 52312 76 98 13 87 16 4 6 Dana 54321 37 64 87 100 פלט
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http://www.netanya.ac.il/ahmad5 The Awk Utility – example4 {print NR,FNR,NF,$0} p1 Yosi 12345 70 80 45 17 Ron 65432 90 72 65 Rami 52312 76 98 13 87 16 Dana 54321 37 64 87 100 f1 > awk -f p1 f1 f2 הפעלה 1 1 6 Yosi 12345 70 80 45 17 2 2 5 Ron 65432 90 72 65 3 3 7 Rami 52312 76 98 13 87 16 4 4 6 Dana 54321 37 64 87 100 5 1 3 Udi Unix data_structure 6 2 5 Ahmad Java Unix c c# 7 3 3 Gershon c# Asp.Net פלט Udi Unix, data_structure Ahmad Java, Unix, c, c# Gershon c#, Asp.Net f2
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http://www.netanya.ac.il/ahmad6 The Awk Utility – example5 BEGIN {“Hi”} {print NR,FNR,NF,$0} END {“Bye”} p1 Yosi 12345 70 80 45 17 Ron 65432 90 72 65 Rami 52312 76 98 13 87 16 Dana 54321 37 64 87 100 f1 > awk -f p1 f1 f2 הפעלה Hi 1 1 6 Yosi 12345 70 80 45 17 2 2 5 Ron 65432 90 72 65 3 3 7 Rami 52312 76 98 13 87 16 4 4 6 Dana 54321 37 64 87 100 5 1 3 Udi Unix data_structure 6 2 5 Ahmad Java Unix c c# 7 3 3 Gershon c# Asp.Net Bye פלט Udi Unix, data_structure Ahmad Java, Unix, c, c# Gershon c#, Asp.Net f2
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http://www.netanya.ac.il/ahmad7 The Awk Utility – example6 p1 Number of data files is 2 file_No file file NR FNR NF $0 1 f1 f1 1 1 6 Yosi 12345 70 80 45 17 1 f1 f1 2 2 5 Ron 65432 90 72 65 1 f1 f1 3 3 7 Rami 52312 76 98 13 87 16 1 f1 f1 4 4 6 Dana 54321 37 64 87 100 2 f2 f2 5 1 3 Udi Unix, data_structure 2 f2 f2 6 2 5 Ahmad Java, Unix, c, c# 2 f2 f2 7 3 3 Gershon c#, Asp.Net bye פלט Udi Unix, data_structure Ahmad Java, Unix, c, c# Gershon c#, Asp.Net f2 BEGIN {print "Number of data files is",ARGC-1 print "file_No\tfile\tfile\tNR\tFNR\tNF\t$0" } { print ARGIND,"\t",ARGV[ARGIND],"\t",FILENAME,"\t",NR,"\t",FNR,"\t",NF,"\t",$0} END { print "bye“ } Yosi 12345 70 80 45 17 Ron 65432 90 72 65 Rami 52312 76 98 13 87 16 Dana 54321 37 64 87 100 f1 > awk -f p1 f1 f2 הפעלה
![The Awk Utility – example6 p1 Number of data files is 2 file_No file file NR FNR NF $0 1 f1 f Yosi f1 f Ron f1 f Rami f1 f Dana f2 f Udi Unix, data_structure 2 f2 f Ahmad Java, Unix, c, c# 2 f2 f Gershon c#, Asp.Net bye פלט Udi Unix, data_structure Ahmad Java, Unix, c, c# Gershon c#, Asp.Net f2 BEGIN {print Number of data files is ,ARGC-1 print file_No\tfile\tfile\tNR\tFNR\tNF\t$0 } { print ARGIND, \t ,ARGV[ARGIND], \t ,FILENAME, \t ,NR, \t ,FNR, \t ,NF, \t ,$0} END { print bye } Yosi Ron Rami Dana f1 > awk -f p1 f1 f2 הפעלה](http://images.slideplayer.com./37/10707242/slides/slide_7.jpg "The Awk Utility – example6 p1 Number of data files is 2 file_No file file NR FNR NF $0 1 f1 f Yosi f1 f Ron f1 f Rami f1 f Dana f2 f Udi Unix, data_structure 2 f2 f Ahmad Java, Unix, c, c# 2 f2 f Gershon c#, Asp.Net bye פלט Udi Unix, data_structure Ahmad Java, Unix, c, c# Gershon c#, Asp.Net f2 BEGIN {print Number of data files is ,ARGC-1 print file_No\tfile\tfile\tNR\tFNR\tNF\t$0 } { print ARGIND, \t ,ARGV[ARGIND], \t ,FILENAME, \t ,NR, \t ,FNR, \t ,NF, \t ,$0} END { print bye } Yosi Ron Rami Dana f1 > awk -f p1 f1 f2 הפעלה")
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http://www.netanya.ac.il/ahmad8 The Awk Utility – example7 {print "The length of ",$1,"is",length($1)} p1 The length of Yosi is 4 The length of Ron is 3 The length of Rami is 4 The length of Dana is 4 פלט Yosi 12345 70 80 45 17 Ron 65432 90 72 65 Rami 52312 76 98 13 87 16 Dana 54321 37 64 87 100 f1
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http://www.netanya.ac.il/ahmad9 The Awk Utility – example8 NR==2 {print $0} p1 Ron 65432 90 72 65 פלט Yosi 12345 70 80 45 17 Ron 65432 90 72 65 Rami 52312 76 98 13 87 16 Dana 54321 37 64 87 100 f1
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http://www.netanya.ac.il/ahmad10 The Awk Utility – example9 $3>70 {print $0} p1 Ron 65432 90 72 65 Rami 52312 76 98 13 87 16 פלט Yosi 12345 70 80 45 17 Ron 65432 90 72 65 Rami 52312 76 98 13 87 16 Dana 54321 37 64 87 100 f1
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http://www.netanya.ac.il/ahmad11 The Awk Utility – example10 !($3>70) {print $0} p1 Yosi 12345 70 80 45 17 Dana 54321 37 64 87 100 פלט Yosi 12345 70 80 45 17 Ron 65432 90 72 65 Rami 52312 76 98 13 87 16 Dana 54321 37 64 87 100 f1
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http://www.netanya.ac.il/ahmad12 The Awk Utility – example11 NR==2 || !($3>70) {print $0} p1 Yosi 12345 70 80 45 17 Ron 65432 90 72 65 Dana 54321 37 64 87 100 פלט Yosi 12345 70 80 45 17 Ron 65432 90 72 65 Rami 52312 76 98 13 87 16 Dana 54321 37 64 87 100 f1
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http://www.netanya.ac.il/ahmad13 The Awk Utility – example12 NR==1, NF==7 {print $0} p1 Yosi 12345 70 80 45 17 Ron 65432 90 72 65 Rami 52312 76 98 13 87 16 פלט Yosi 12345 70 80 45 17 Ron 65432 90 72 65 Rami 52312 76 98 13 87 16 Dana 54321 37 64 87 100 f1
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http://www.netanya.ac.il/ahmad14 The Awk Utility – example13 /Aviv/ {print $0} p1 Ron 65432 Tel-Aviv 90 72 65 Aviv 52312 Haifa 76 98 13 87 16 פלט Yosi 12345 Ranana 70 80 45 17 Ron 65432 Tel-Aviv 90 72 65 Aviv 52312 Haifa 76 98 13 87 16 Dana 54321 Netanya 37 64 87 100 f1
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http://www.netanya.ac.il/ahmad15 The Awk Utility – example14 $1==“Aviv” {print $0} p1 Aviv 52312 Haifa 76 98 13 87 16 פלט Yosi 12345 Ranana 70 80 45 17 Ron 65432 Tel-Aviv 90 72 65 Aviv 52312 Haifa 76 98 13 87 16 Dana 54321 Netanya 37 64 87 100 f1
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http://www.netanya.ac.il/ahmad16 The Awk Utility – example15 $3==“Aviv” {print $0} p1 פלט Yosi 12345 Ranana 70 80 45 17 Ron 65432 Tel-Aviv 90 72 65 Aviv 52312 Haifa 76 98 13 87 16 Dana 54321 Netanya 37 64 87 100 f1
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http://www.netanya.ac.il/ahmad17 The Awk Utility – example16 BEGIN {max=0 ; Name=""} NF-2>max {max=NF-2 ; Name=$1} END {print Name,”with”,max,”grades”} p1 Aviv with 6 grades פלט Yosi 12345 Ranana 70 80 45 17 Ron 65432 Tel-Aviv 90 72 65 Aviv 52312 Haifa 76 98 13 87 16 Dana 54321 Netanya 37 64 87 100 f1
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http://www.netanya.ac.il/ahmad18 The Awk Utility – example17 BEGIN {n=0} /Aviv/ {n=n+1} END {print "Aviv occurs",n,"times."} p1 Aviv occurs 2 times. פלט Yosi 12345 Ranana 70 80 45 17 Ron 65432 Tel-Aviv 90 72 65 Aviv 52312 Haifa 76 98 13 87 16 Dana 54321 Netanya 37 64 87 100 f1
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http://www.netanya.ac.il/ahmad19 The Awk Utility – example18 END {print $0} p1 Dana 54321 Netanya 37 64 87 100 פלט Yosi 12345 Ranana 70 80 45 17 Ron 65432 Tel-Aviv 90 72 65 Aviv 52312 Haifa 76 98 13 87 16 Dana 54321 Netanya 37 64 87 100 f1
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http://www.netanya.ac.il/ahmad20 The Awk Utility – example19 { sum=0; for (i=4;i<=NF;i++) sum=sum+$i; print $1,"Average is",sum/(NF-3); } p1 Yosi Average is 53 Ron Average is 75.6667 Aviv Average is 58 Dana Average is 72 פלט Yosi 12345 Ranana 70 80 45 17 Ron 65432 Tel-Aviv 90 72 65 Aviv 52312 Haifa 76 98 13 87 16 Dana 54321 Netanya 37 64 87 100 f1
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http://www.netanya.ac.il/ahmad21 The Awk Utility – example20 BEGIN {maxAvg=0; Name=""} { sum=0; for (i=4;i<=NF;i++) sum=sum+$i; print $1,"Average is",sum/(NF-3); if (maxAvg < sum/(NF-3) ) { maxAvg=sum/(NF-3); Name=$1; } END {print Name,"with", maxAvg} p1 Yosi Average is 53 Ron Average is 75.6667 Aviv Average is 58 Dana Average is 72 Ron with 75.6667 פלט Yosi 12345 Ranana 70 80 45 17 Ron 65432 Tel-Aviv 90 72 65 Aviv 52312 Haifa 76 98 13 87 16 Dana 54321 Netanya 37 64 87 100 f1
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http://www.netanya.ac.il/ahmad22 The Awk Utility – example21 {Line[NR] = $0 } END {var = NR; while (var > 0) { print line[var] var -- } p1 Dana 54321 Netanya 37 64 87 100 Aviv 52312 Haifa 76 98 13 87 16 Ron 65432 Tel-Aviv 90 72 65 Yosi 12345 Ranana 70 80 45 17 פלט Yosi 12345 Ranana 70 80 45 17 Ron 65432 Tel-Aviv 90 72 65 Aviv 52312 Haifa 76 98 13 87 16 Dana 54321 Netanya 37 64 87 100 f1
![The Awk Utility – example21 {Line[NR] = $0 } END {var = NR; while (var > 0) { print line[var] var -- } p1 Dana Netanya Aviv Haifa Ron Tel-Aviv Yosi Ranana פלט Yosi Ranana Ron Tel-Aviv Aviv Haifa Dana Netanya f1](http://images.slideplayer.com./37/10707242/slides/slide_22.jpg "The Awk Utility – example21 {Line[NR] = $0 } END {var = NR; while (var > 0) { print line[var] var -- } p1 Dana Netanya Aviv Haifa Ron Tel-Aviv Yosi Ranana פלט Yosi Ranana Ron Tel-Aviv Aviv Haifa Dana Netanya f1")
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http://www.netanya.ac.il/ahmad23 The Awk Utility – example22 (05/2/a) BEGIN {max=0} NF > max { max=NF; sum=0; for (k=1;k<=NF;k++) sum=sum+$k; } END {print sum} p1 82 פלט 12 30 40 100 10 20 f1
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http://www.netanya.ac.il/ahmad24 The Awk Utility – example23 (2006 moed a) כתוב/כתבי תוכנית ב- awk בשם P2 שמקבלת פרמטר אחד שהינו שם קובץ (בהמשך נקרא לו קובץ 1). הנח/י שהתוכן של קובץ 1 הוא מטריצה של מספרים. המספרים בכל שורה בקובץ 1 מופרדים ע"י תו רווח אחד או יותר. התוכנית תדפיס Yes אם מתקיים לפחות אחד משני התנאים הבאים: (1) סכום המספרים בכל שורה בקובץ הינו קבוע, (2) סכום המספרים בכל עמודה בקובץ הינו קבוע,אחרת התוכנית תדפיס No. לדוגמה, נניח שתוכן הקובץ F הוא: 10 30 40 14 26 40 ותוכן הקובץ F2 הוא: 11 9 4 2 1 3 8 10 1 1 לאחר הפעלת התוכנית ע"י הפקודה: >awk -f P2 F יתקבל הפלט: Yes לאחר הפעלת התוכנית ע"י הפקודה: >awk -f P2 F2 יתקבל הפלט: Yes
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http://www.netanya.ac.il/ahmad25 The Awk Utility – example23 (2006 moed a) { for (i=1;i<=NF;i++) { col[i]=col[i]+$i row[NR]=row[NR]+$i } END { for (i=1;i<NF;i++) if ( col[i]!=col[i+1]){ for (i=1;i<NR;i++) if (row[i]!=row[i+1]) { print "No" exit } break } print "Yes" }
![The Awk Utility – example23 (2006 moed a) { for (i=1;i<=NF;i++) { col[i]=col[i]+$i row[NR]=row[NR]+$i } END { for (i=1;i<NF;i++) if ( col[i]!=col[i+1]){ for (i=1;i<NR;i++) if (row[i]!=row[i+1]) { print No exit } break } print Yes }](http://images.slideplayer.com./37/10707242/slides/slide_25.jpg "The Awk Utility – example23 (2006 moed a) { for (i=1;i<=NF;i++) { col[i]=col[i]+$i row[NR]=row[NR]+$i } END { for (i=1;i<NF;i++) if ( col[i]!=col[i+1]){ for (i=1;i<NR;i++) if (row[i]!=row[i+1]) { print No exit } break } print Yes }")
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http://www.netanya.ac.il/ahmad26 The Awk Utility – example24 { for(k=1;k<=NF;k++) A[ARGIND,FNR,k]=$k; } END { for (i=1;i<=FNR;i++) { for (j=1;j<=NF;j++) { for (k=1;k<=ARGIND;k++) sum+=A[k,i,j]; printf("%-5d",sum); sum=0; } printf("\n"); }
![The Awk Utility – example24 { for(k=1;k<=NF;k++) A[ARGIND,FNR,k]=$k; } END { for (i=1;i<=FNR;i++) { for (j=1;j<=NF;j++) { for (k=1;k<=ARGIND;k++) sum+=A[k,i,j]; printf( %-5d ,sum); sum=0; } printf( \n ); }](http://images.slideplayer.com./37/10707242/slides/slide_26.jpg "The Awk Utility – example24 { for(k=1;k<=NF;k++) A[ARGIND,FNR,k]=$k; } END { for (i=1;i<=FNR;i++) { for (j=1;j<=NF;j++) { for (k=1;k<=ARGIND;k++) sum+=A[k,i,j]; printf( %-5d ,sum); sum=0; } printf( \n ); }")
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http://www.netanya.ac.il/ahmad27 The Awk Utility – example25 { for(k=1;k<=NF;k++) A[0,FNR,k]+=$k; } END { for (i=1;i<=FNR;i++) { for (j=1;j<=NF;j++) printf("%-5d",A[0,i,j]); printf("\n"); }
![The Awk Utility – example25 { for(k=1;k<=NF;k++) A[0,FNR,k]+=$k; } END { for (i=1;i<=FNR;i++) { for (j=1;j<=NF;j++) printf( %-5d ,A[0,i,j]); printf( \n ); }](http://images.slideplayer.com./37/10707242/slides/slide_27.jpg "The Awk Utility – example25 { for(k=1;k<=NF;k++) A[0,FNR,k]+=$k; } END { for (i=1;i<=FNR;i++) { for (j=1;j<=NF;j++) printf( %-5d ,A[0,i,j]); printf( \n ); }")
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http://www.netanya.ac.il/ahmad28 The Awk Utility – example21 (2006 moed a) http://www.dc.turkuamk.fi/docs/gnu/awk/gawk_toc.html איך ממשיכים הלאה ?
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