Awk选择数据行

我必须使用awk处理以下数据文件：

YEARS:1995:1996:1997:1998:1999:2000
VISITS
Domain1:259:2549:23695:24889:1240:21202
Domain2:32632:87521:147122:22952:2365:121230
Domain3:5985:92104:921744:43124:74234:68350
Domain4:8321:36520:68712:32102:22003:82100
SIGNUPS
Domain1:212:202:992:1202:986:3253
Domain2:10401:44522:20103:3595:11410:353
Domain3:3695:23230:452030:25052:9858:3020
Domain4:969:24247:9863:24101:5541:3663

我需要知道每年的总访问量和注册量。我的问题是我找不到只选择前四行和后四行的方法，有人能给我一些关于如何实现这一点的提示吗

示例输出（仅限访问）：

您可以匹配“访问”和“注册”行，并设置一个变量，指示正在处理的记录类型

例如：

BEGIN {
    FS = ":";
}
/^YEARS/ {
    for (i = 2 ; i <= NF; i++) {
        year[i] = $i;
    }
    next;
}
/^VISITS/ {
    mode = "VISITS";
    next;
}
/^SIGNUPS/ {
    mode = "SIGNUPS";
    next;
}
{
    for (i = 2; i <= NF; i++) {
        # output "VISITS"/"SIGNUPS", domain, year, value
        print mode, $1, year[i], $i;
    }
}

开始{
FS=“：”；
}
/^年/{
对于（i=2；i您可以匹配“访问”和“注册”行，并设置一个变量，指示您正在处理的记录类型

例如：

BEGIN {
    FS = ":";
}
/^YEARS/ {
    for (i = 2 ; i <= NF; i++) {
        year[i] = $i;
    }
    next;
}
/^VISITS/ {
    mode = "VISITS";
    next;
}
/^SIGNUPS/ {
    mode = "SIGNUPS";
    next;
}
{
    for (i = 2; i <= NF; i++) {
        # output "VISITS"/"SIGNUPS", domain, year, value
        print mode, $1, year[i], $i;
    }
}

开始{
FS=“：”；
}
/^年/{
对于（i=2；i
而不是：

split( x, d ); split( x, ym )

而不是：

split( x, d ); split( x, ym )

当您说“仅选择前四行和后四行”时，我假设您的意思是分别处理访问和注册：

awk -F: '
$1 == "YEARS"   {for (i=2; i<=NF; i++) {yr[i] = $i}; next}
$1 == "VISITS"  {visits = 1; signups = 0; next}
$1 == "SIGNUPS" {visits = 0; signups = 1; next}
visits { 
  for (i=2; i<=NF; i++) {
    v_d[$1] += $i     # visits by domain
    v_y[yr[i]] += $i  # visits by year
  }
}
signups {
  for (i=2; i<=NF; i++) {
    s_d[$1] += $i     # signups by domain
    s_y[yr[i]] += $i  # signups by year
  }
}
END {
  OFS=FS
  print "VISITS"
  for (d in v_d) print d, v_d[d]
  for (y in v_y) print y, v_y[y]
  print "SIGNUPS"
  for (d in s_d) print d, s_d[d]
  for (y in s_y) print y, s_y[y]
}'

当您说“仅选择前四行和后四行”时，我假设您的意思是分别处理访问和注册：

awk -F: '
$1 == "YEARS"   {for (i=2; i<=NF; i++) {yr[i] = $i}; next}
$1 == "VISITS"  {visits = 1; signups = 0; next}
$1 == "SIGNUPS" {visits = 0; signups = 1; next}
visits { 
  for (i=2; i<=NF; i++) {
    v_d[$1] += $i     # visits by domain
    v_y[yr[i]] += $i  # visits by year
  }
}
signups {
  for (i=2; i<=NF; i++) {
    s_d[$1] += $i     # signups by domain
    s_y[yr[i]] += $i  # signups by year
  }
}
END {
  OFS=FS
  print "VISITS"
  for (d in v_d) print d, v_d[d]
  for (y in v_y) print y, v_y[y]
  print "SIGNUPS"
  for (d in s_d) print d, s_d[d]
  for (y in s_y) print y, s_y[y]
}'

你能根据提供的输入发布一个预期输出的示例吗？你能根据提供的输入发布一个预期输出的示例吗？
VISITS
Domain1:73834
Domain2:413822
Domain3:1205541
Domain4:249758
1999:99842
2000:292882
1995:47197
1996:218694
1997:1161273
1998:123067
SIGNUPS
Domain1:6847
Domain2:90384
Domain3:516885
Domain4:68384
1999:27795
2000:10289
1995:15277
1996:92201
1997:482988
1998:53950