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Remove duplicate words from column 1


 
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# 1  
Remove duplicate words from column 1

Tried using sed and uniq but it's removing the entire line. Can't seem to figure a way to just remove the word. Any help is appreciated. I have a file:
Code:
dog, text1, text2, text3
dog, text1, text2, text3
dog, text1, text2, text3
cat, text1, text2, text3

Trying to remove all duplicate instances of dog and just keep the formatting:
Code:
dog, text1, text2, text3
    text1, text2, text3
    text1, text2, text3
cat, text1, text2, text3

Thanks.
# 2  
Code:
awk 'F[$1]++ {$1=OFS}1' test.file

This User Gave Thanks to Aia For This Post:
# 3  
Or try:
Code:
awk 'F[$1]++ {p=$1; gsub(/./,FS,p); sub($1,p)}1' file

or, if spacing is always exactly one space:
Code:
awk 'F[$1]++ {gsub(/./,FS,$1)}1'  file

Code:
dog, text1, text2, text3
     text1, text2, text3
     text1, text2, text3
cat, text1, text2, text3

# 4  
can the text be manipulated from horizontal to vertical for the output so there is only one row per instance?
Code:
dog, text1, text2, text3, text1 text2, text3, text1, text2, text3
cat, text1, text2, text3

# 5  
Try
Code:
awk '$1 != L {printf "%s%s", DL, $0; DL=RS; L = $1; next} {printf "%s%s%s%s%s", $2, OFS, $3, OFS, $4} END {print ""}' FS="," OFS="," file

This User Gave Thanks to RudiC For This Post:
# 6  
Thanks again RudiC!
# 7  
Code:
awk 'p!=$1{if(NR>1) print s; p=s=$1} {$1=x; s=s $0} END{print s}' FS=, OFS=, file

 

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