I have a tab file with two columns like that
5 6 14 22 23 25 27 84 85 88 89 94 95 98 100 6 94
6 8 17 20 193 205 209 284 294 295 299 304 305 307 406 205 284 307 406
2 10 13 40 47 58 2 13 40 87
and the desired output should be
5 6 14 22 23 25 27 84 85 88 89 94 95 98 100 14 27
6 8 17 20 193 205 209 284 294 295 299 304 305 307 406 6 209 299 305
2 10 13 23 40 47 58 87 10 23 40 58
I would like to change the numbers in 2nd column for random numbers in 1st column resulting in an output in 2nd column with the same number of numbers. I mean e.g. if there are four numbers in 2nd column for x row, the output must have four random numbers from 1st column for this row, and so on...
I'm try to create two arrays by AWK and split and replace every number in 2nd column for numbers in 1st column but not in a randomly way. I have seen the rand() function but I don't know exactly how joint these two things in a script. Is it possible to do in BASH environment or are there other better ways to do it in BASH environment? Thanks in advance
awk to the rescue!
$ awk -F'\t' 'function shuf(a,n)
{for(i=1;i<n;i++)
{j=i+int(rand()*(n+1-i));
t=a[i]; a[i]=a[j]; a[j]=t}}
function join(a,n,x,s)
{for(i=1;i<=n;i++) {x=x s a[i]; s=" "}
return x}
BEGIN{srand()}
{an=split($1,a," ");
shuf(a,an);
bn=split($2,b," ");
delete m; delete c; j=0;
for(i=1;i<=bn;i++) m[b[i]];
# pull elements from a upto required sample size,
# not intersecting with the previous sample set
for(i=1;i<=an && j<bn;i++) if(!(a[i] in m)) c[++j]=a[i];
cn=asort(c);
print $1 FS join(c,cn)}' file
5 6 14 22 23 25 27 84 85 88 89 94 95 98 100 85 94
6 8 17 20 193 205 209 284 294 295 299 304 305 307 406 20 205 294 295
2 10 13 23 40 47 58 87 10 13 47 87
shuffle (standard algorithm) the input array, sample required number of elements, additional requirement is no intersection with the existing sample set. Helper structure map to keep existing sample set and used for in tests. The rest should be easy to read.
Assuming that there is a tab delimiting the two columns, and each column is a space delimited list:
awk 'BEGIN{srand()}
{n=split($1,a," ");
m=split($2,b," ");
printf "%s\t",$1;
for (i=1;i<=m;i++)
printf "%d%c", a[int(rand() * n) +1], (i == m) ? "\n" : " "
}' FS=\\t input
Try this:
# This can be an external file of course
# Note COL1 and COL2 seprated by hard TAB
cat <<EOF > d1.txt
5 6 14 22 23 25 27 84 85 88 89 94 95 98 100 6 94
6 8 17 20 193 205 209 284 294 295 299 304 305 307 406 205 284 307 406
2 10 13 40 47 58 2 13 40 87
EOF
# Loop to read each line, not econvert TAB to:, though could have used IFS
cat d1.txt | sed 's/ /:/' | while read LINE
do
# Get the 1st column data
COL1=$( echo ${LINE} | cut -d':' -f1 )
# Get col1 number of items
NUM_COL1=$( echo ${COL1} | wc -w )
# Get col2 number of items
NUM_COL2=$( echo ${LINE} | cut -d':' -f2 | wc -w )
# Now split col1 items into an array
read -r -a COL1_NUMS <<< "${COL1}"
COL2=" "
# THis loop runs once for each COL2 item
COUNT=0
while [ ${COUNT} -lt ${NUM_COL2} ]
do
# Generate a random number to use as teh random index for COL1
COL1_IDX=${RANDOM}
let "COL1_IDX %= ${NUM_COL1}"
NEW_NUM=${COL1_NUMS[${COL1_IDX}]}
# Check for duplicate
DUP_FOUND=$( echo "${COL2}" | grep ${NEW_NUM} )
if [ -z "${DUP_FOUND}" ]
then
# Not a duplicate, increment loop conter and do next one
let "COUNT = COUNT + 1 "
# Add the random COL1 item to COL2
COL2="${COL2} ${COL1_NUMS[${COL1_IDX}]}"
fi
done
# Sort COL2
COL2=$( echo ${COL2} | tr ' ' '\012' | sort -n | tr '\012' ' ' )
# Print
echo ${COL1} :: ${COL2}
done
Output:
5 6 14 22 23 25 27 84 85 88 89 94 95 98 100 :: 88 95
6 8 17 20 193 205 209 284 294 295 299 304 305 307 406 :: 20 299 304 305
2 10 13 40 47 58 :: 2 10 40 58
So i'm issuing a query to mysql and it's returning say 1,000 rows,but each iteration of the program could return a different number of rows. I need to break up (without using a mysql limit) this result set into chunks of 100 rows that i can then programatically iterate through in these 100 row chunks.
So
MySQLOutPut='1 2 3 4 ... 10,000"
I need to turn that into an array that looks like
array[1]="1 2 3 ... 100"
array[2]="101 102 103 ... 200"
etc.
I have no clue how to accomplish this elegantly
Using Charles' data generation:
MySQLOutput=$(seq 1 10000 | tr '\n' ' ')
# the sed command will add a newline after every 100 words
# and the mapfile command will read the lines into an array
mapfile -t MySQLOutSplit < <(
sed -r 's/([^[:blank:]]+ ){100}/&\n/g; $s/\n$//' <<< "$MySQLOutput"
)
echo "${#MySQLOutSplit[#]}"
# 100
echo "${MySQLOutSplit[0]}"
# 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100
echo "${MySQLOutSplit[99]}"
# 9901 9902 9903 9904 9905 9906 9907 9908 9909 9910 9911 9912 9913 9914 9915 9916 9917 9918 9919 9920 9921 9922 9923 9924 9925 9926 9927 9928 9929 9930 9931 9932 9933 9934 9935 9936 9937 9938 9939 9940 9941 9942 9943 9944 9945 9946 9947 9948 9949 9950 9951 9952 9953 9954 9955 9956 9957 9958 9959 9960 9961 9962 9963 9964 9965 9966 9967 9968 9969 9970 9971 9972 9973 9974 9975 9976 9977 9978 9979 9980 9981 9982 9983 9984 9985 9986 9987 9988 9989 9990 9991 9992 9993 9994 9995 9996 9997 9998 9999 10000
Something like this:
# generate content
MySQLOutput=$(seq 1 10000 | tr '\n' ' ') # seq is awful, don't use in real life
# split into a large array, each item stored individually
read -r -a MySQLoutArr <<<"$MySQLOutput"
# add each batch of 100 items into a new array entry
batchSize=100
MySQLoutSplit=( )
for ((i=0; i<${#MySQLoutArr[#]}; i+=batchSize)); do
MySQLoutSplit+=( "${MySQLoutArr[*]:i:batchSize}" )
done
To explain some of the finer points:
read -r -a foo reads contents into an array named foo, split on IFS, up to the next character specified by read -d (none given here, thus reading only a single line). If you wanted each line to be a new array entry, consider IFS=$'\n' read -r -d '' -a foo, which will read each line into an array, terminated at the first NUL in the input stream.
"${foo[*]:i:batchSize}" expands to a list of items in array foo, starting at index i, and taking the next batchSize items, concatenated into a single string with the first character in $IFS used as a separator.
I've managed to extract data (from an html page) that goes into a table, and I've isolated the columns of said table into a text file that contains the lines below:
[30,30,32,35,34,43,52,68,88,97,105,107,107,105,101,93,88,80,69,55],
[28,6,6,50,58,56,64,87,99,110,116,119,120,117,114,113,103,82,6,47],
[-7,,,43,71,30,23,28,13,13,10,11,12,11,13,22,17,3,,-15,-20,,38,71],
[0,,,3,5,1.5,1,1.5,0.5,0.5,0,0.5,0.5,0.5,0.5,1,0.5,0,-0.5,-0.5,2.5]
Each bracketed list of numbers represents a column. What I'd like to do is turn these lists into actual columns that I can work with in different data formats. I'd also like to be sure to include that blank parts of these lists too (i.e., "[,,,]")
This is basically what I'm trying to accomplish:
30 28 -7 0
30 6
32 6
35 50 43 3
34 58 71 5
43 56 30 1.5
52 64 23 1
. . . .
. . . .
. . . .
I'm parsing data from a web page, and ultimately planning to make the process as automated as possible so I can easily work with the data after I output it to a nice format.
Anyone know how to do this, have any suggestions, or thoughts on scripting this?
Since you have your lists in python, just do it in python:
l=[["30", "30", "32"], ["28","6","6"], ["-7", "", ""], ["0", "", ""]]
for i in zip(*l):
print "\t".join(i)
produces
30 28 -7 0
30 6
32 6
awk based solution:
awk -F, '{gsub(/\[|\]/, ""); for (i=1; i<=NF; i++) a[i]=a[i] ? a[i] OFS $i: $i}
END {for (i=1; i<=NF; i++) print a[i]}' file
30 28 -7 0
30 6
32 6
35 50 43 3
34 58 71 5
43 56 30 1.5
52 64 23 1
..........
..........
Another solution, but it works only for file with 4 lines:
$ paste \
<(sed -n '1{s,\[,,g;s,\],,g;s|,|\n|g;p}' t) \
<(sed -n '2{s,\[,,g;s,\],,g;s|,|\n|g;p}' t) \
<(sed -n '3{s,\[,,g;s,\],,g;s|,|\n|g;p}' t) \
<(sed -n '4{s,\[,,g;s,\],,g;s|,|\n|g;p}' t)
30 28 -7 0
30 6
32 6
35 50 43 3
34 58 71 5
43 56 30 1.5
52 64 23 1
68 87 28 1.5
88 99 13 0.5
97 110 13 0.5
105 116 10 0
107 119 11 0.5
107 120 12 0.5
105 117 11 0.5
101 114 13 0.5
93 113 22 1
88 103 17 0.5
80 82 3 0
69 6 -0.5
55 47 -15 -0.5
-20 2.5
38
71
Updated: or another version with preprocessing:
$ sed 's|\[||;s|\][,]\?||' t >t2
$ paste \
<(sed -n '1{s|,|\n|g;p}' t2) \
<(sed -n '2{s|,|\n|g;p}' t2) \
<(sed -n '3{s|,|\n|g;p}' t2) \
<(sed -n '4{s|,|\n|g;p}' t2)
If a file named data contains the data given in the problem (exactly as defined above), then the following bash command line will produce the output requested:
$ sed -e 's/\[//' -e 's/\]//' -e 's/,/ /g' <data | rs -T
Example:
cat data
[30,30,32,35,34,43,52,68,88,97,105,107,107,105,101,93,88,80,69,55],
[28,6,6,50,58,56,64,87,99,110,116,119,120,117,114,113,103,82,6,47],
[-7,,,43,71,30,23,28,13,13,10,11,12,11,13,22,17,3,,-15,-20,,38,71],
[0,,,3,5,1.5,1,1.5,0.5,0.5,0,0.5,0.5,0.5,0.5,1,0.5,0,-0.5,-0.5,2.5]
$ sed -e 's/[//' -e 's/]//' -e 's/,/ /g' <data | rs -T
30 28 -7 0
30 6 43 3
32 6 71 5
35 50 30 1.5
34 58 23 1
43 56 28 1.5
52 64 13 0.5
68 87 13 0.5
88 99 10 0
97 110 11 0.5
105 116 12 0.5
107 119 11 0.5
107 120 13 0.5
105 117 22 1
101 114 17 0.5
93 113 3 0
88 103 -15 -0.5
80 82 -20 -0.5
69 6 38 2.5
55 47 71