Replace & filter dataframe row values
I have two dataframe's one with expression and another with values. Dataframe 1 criteria column has value with column name of another dataframe. My need is to take each row values from Dataframe 2 and replace Dataframe 1 criteria without loop.
How should I do it in an optimized way ?
DataFrame 1:
Criteria point
0 chgdsl='10' 1
1 chgdt ='01022007' 2
3 chgdsl='9' 3
DataFrame 2:
chgdsl chgdt chgname
0 10 01022007 namrr
1 9 02022007 chard
2 9 01022007 exprr
I expect that when I take first row of DataFrame 2 , output of Dataframe 1 will be 10='10' , 01022007 ='01022007' 10='9'
Need to take one row at a time from Dataframe 2 and replace it in all rows of Dataframe 1.
python dataframe
asked Nov 13 '18 at 5:58
VelVel
94
add a comment |
I have two dataframe's one with expression and another with values. Dataframe 1 criteria column has value with column name of another dataframe. My need is to take each row values from Dataframe 2 and replace Dataframe 1 criteria without loop.
How should I do it in an optimized way ?
DataFrame 1:
Criteria point
0 chgdsl='10' 1
1 chgdt ='01022007' 2
3 chgdsl='9' 3
DataFrame 2:
chgdsl chgdt chgname
0 10 01022007 namrr
1 9 02022007 chard
2 9 01022007 exprr
I expect that when I take first row of DataFrame 2 , output of Dataframe 1 will be 10='10' , 01022007 ='01022007' 10='9'
Need to take one row at a time from Dataframe 2 and replace it in all rows of Dataframe 1.
python dataframe
asked Nov 13 '18 at 5:58
VelVel
94
what's your expected output?
– AkshayNevrekar
Nov 13 '18 at 6:33
when i take first row of DataFrame 2 output of Dataframe 1 will be, 10='10' , 01022007 ='01022007' 10='9'
– Vel
Nov 13 '18 at 6:34
updated the question
– Vel
Nov 13 '18 at 8:21
Also what is the structure of your dataframes? IsDF1['Criteria']a string variable?
– Sotos
Nov 13 '18 at 8:38
Yes, all values in df['Criteria'] is string
– Vel
Nov 13 '18 at 9:10
add a comment |
I have two dataframe's one with expression and another with values. Dataframe 1 criteria column has value with column name of another dataframe. My need is to take each row values from Dataframe 2 and replace Dataframe 1 criteria without loop.
How should I do it in an optimized way ?
DataFrame 1:
Criteria point
0 chgdsl='10' 1
1 chgdt ='01022007' 2
3 chgdsl='9' 3
DataFrame 2:
chgdsl chgdt chgname
0 10 01022007 namrr
1 9 02022007 chard
2 9 01022007 exprr
I expect that when I take first row of DataFrame 2 , output of Dataframe 1 will be 10='10' , 01022007 ='01022007' 10='9'
Need to take one row at a time from Dataframe 2 and replace it in all rows of Dataframe 1.
python dataframe
asked Nov 13 '18 at 5:58
VelVel
94
I have two dataframe's one with expression and another with values. Dataframe 1 criteria column has value with column name of another dataframe. My need is to take each row values from Dataframe 2 and replace Dataframe 1 criteria without loop.
How should I do it in an optimized way ?
DataFrame 1:
Criteria point
0 chgdsl='10' 1
1 chgdt ='01022007' 2
3 chgdsl='9' 3
DataFrame 2:
chgdsl chgdt chgname
0 10 01022007 namrr
1 9 02022007 chard
2 9 01022007 exprr
I expect that when I take first row of DataFrame 2 , output of Dataframe 1 will be 10='10' , 01022007 ='01022007' 10='9'
Need to take one row at a time from Dataframe 2 and replace it in all rows of Dataframe 1.
python dataframe
python dataframe
asked Nov 13 '18 at 5:58
VelVel
94
asked Nov 13 '18 at 5:58
VelVel
94
edited Nov 13 '18 at 9:21
Vel
asked Nov 13 '18 at 5:58
VelVel
94
asked Nov 13 '18 at 5:58
VelVel
94
asked Nov 13 '18 at 5:58
VelVel
94
94
what's your expected output?
– AkshayNevrekar
Nov 13 '18 at 6:33
when i take first row of DataFrame 2 output of Dataframe 1 will be, 10='10' , 01022007 ='01022007' 10='9'
– Vel
Nov 13 '18 at 6:34
updated the question
– Vel
Nov 13 '18 at 8:21
Also what is the structure of your dataframes? IsDF1['Criteria']a string variable?
– Sotos
Nov 13 '18 at 8:38
Yes, all values in df['Criteria'] is string
– Vel
Nov 13 '18 at 9:10
add a comment |
what's your expected output?
– AkshayNevrekar
Nov 13 '18 at 6:33
when i take first row of DataFrame 2 output of Dataframe 1 will be, 10='10' , 01022007 ='01022007' 10='9'
– Vel
Nov 13 '18 at 6:34
updated the question
– Vel
Nov 13 '18 at 8:21
Also what is the structure of your dataframes? IsDF1['Criteria']a string variable?
– Sotos
Nov 13 '18 at 8:38
Yes, all values in df['Criteria'] is string
– Vel
Nov 13 '18 at 9:10
what's your expected output?
– AkshayNevrekar
Nov 13 '18 at 6:33
what's your expected output?
– AkshayNevrekar
Nov 13 '18 at 6:33
when i take first row of DataFrame 2 output of Dataframe 1 will be, 10='10' , 01022007 ='01022007' 10='9'
– Vel
Nov 13 '18 at 6:34
when i take first row of DataFrame 2 output of Dataframe 1 will be, 10='10' , 01022007 ='01022007' 10='9'
– Vel
Nov 13 '18 at 6:34
updated the question
– Vel
Nov 13 '18 at 8:21
updated the question
– Vel
Nov 13 '18 at 8:21
Also what is the structure of your dataframes? Is
DF1['Criteria'] a string variable?– Sotos
Nov 13 '18 at 8:38
Also what is the structure of your dataframes? Is
DF1['Criteria'] a string variable?– Sotos
Nov 13 '18 at 8:38
Yes, all values in df['Criteria'] is string
– Vel
Nov 13 '18 at 9:10
Yes, all values in df['Criteria'] is string
– Vel
Nov 13 '18 at 9:10
add a comment |
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what's your expected output?
– AkshayNevrekar
Nov 13 '18 at 6:33
when i take first row of DataFrame 2 output of Dataframe 1 will be, 10='10' , 01022007 ='01022007' 10='9'
– Vel
Nov 13 '18 at 6:34
updated the question
– Vel
Nov 13 '18 at 8:21
Also what is the structure of your dataframes? Is
DF1['Criteria']a string variable?– Sotos
Nov 13 '18 at 8:38
Yes, all values in df['Criteria'] is string
– Vel
Nov 13 '18 at 9:10