I have two pandas dataframes matches with columns (match_id, team_id,date, ...) and teams_att with columns (id, team_id, date, overall_rating, ...).
I want to join the two dataframes on matches.team_id = teams_att.team_id and teams_att.date closest to matches.date
Example
matches
match_id team_id date
1 101 2012-05-17
2 101 2014-07-11
3 102 2010-05-21
4 102 2017-10-24
teams_att
id team_id date overall_rating
1 101 2010-02-22 67
2 101 2011-02-22 69
3 101 2012-02-20 73
4 101 2013-09-17 79
5 101 2014-09-10 74
6 101 2015-08-30 82
7 102 2015-03-21 42
8 102 2016-03-22 44
Desired results
match_id team_id matches.date teams_att.date overall_rating
1 101 2012-05-17 2012-02-20 73
2 101 2014-07-11 2014-09-10 74
3 102 2010-05-21 2015-03-21 42
4 102 2017-10-24 2016-03-22 44
You can use merge_asof with by and direction parameters:
pd.merge_asof(matches.sort_values('date'),
teams_att.sort_values('date'),
on='date', by='team_id',
direction='nearest')
Output:
match_id team_id date id overall_rating
0 3 102 2010-05-21 7 42
1 1 101 2012-05-17 3 73
2 2 101 2014-07-11 5 74
3 4 102 2017-10-24 8 44
We using merge_asof (Please check Scott's answer, that is the right way for solving this type problem :-) cheers )
g1=df1.groupby('team_id')
g=df.groupby('team_id')
l=[]
for x in [101,102]:
l.append(pd.merge_asof(g.get_group(x),g1.get_group(x),on='date',direction ='nearest'))
pd.concat(l)
Out[405]:
match_id team_id_x date id team_id_y overall_rating
0 1 101 2012-05-17 3 101 73
1 2 101 2014-07-11 5 101 74
0 3 102 2010-05-21 7 102 42
1 4 102 2017-10-24 8 102 44
Related
I would like to find consecutive numbers in column A and Column B in python, Column A should be ascending but Column B is descending. I am attaching an example file.
Input file
nucleotide
Pos_A
Pos_B
Connection_Pos20_Pos102
20
102
Connection_Pos19_Pos102
19
102
Connection_Pos20_Pos101
20
101
Connection_Pos18_Pos102
18
102
Connection_Pos19_Pos101
19
101
Connection_Pos20_Pos100
20
100
Connection_Pos17_Pos102
17
102
Connection_Pos18_Pos101
18
101
Connection_Pos19_Pos100
19
100
Connection_Pos20_Pos99
20
99
Connection_Pos16_Pos102
16
102
Connection_Pos17_Pos101
17
101
Connection_Pos18_Pos100
18
100
Connection_Pos19_Pos99
19
99
Connection_Pos20_Pos98
20
98
Connection_Pos15_Pos102
15
102
Connection_Pos16_Pos101
16
101
Connection_Pos17_Pos100
17
100
Connection_Pos18_Pos99
18
99
Connection_Pos19_Pos98
19
98
Connection_Pos20_Pos97
20
97
Connection_Pos14_Pos102
14
102
Connection_Pos15_Pos101
15
101
Connection_Pos16_Pos100
16
100
Output:
nucleotide
Pos_A
Pos_B
Consecutive ID
Consecutive Number (Size)
Connection_Pos20_Pos102
20
102
101
1
Connection_Pos19_Pos102
19
102
100
2
Connection_Pos20_Pos101
20
101
100
2
Connection_Pos18_Pos102
18
102
99
3
Connection_Pos19_Pos101
19
101
99
3
Connection_Pos20_Pos100
20
100
99
3
Connection_Pos17_Pos102
17
102
98
4
Connection_Pos18_Pos101
18
101
98
4
Connection_Pos19_Pos100
19
100
98
4
Connection_Pos20_Pos99
20
99
98
4
Connection_Pos16_Pos102
16
102
97
5
Connection_Pos17_Pos101
17
101
97
5
Connection_Pos18_Pos100
18
100
97
5
Connection_Pos19_Pos99
19
99
97
5
Connection_Pos20_Pos98
20
98
97
5
Connection_Pos15_Pos102
15
102
96
6
Connection_Pos16_Pos101
16
101
96
6
Connection_Pos17_Pos100
17
100
96
6
Connection_Pos18_Pos99
18
99
96
6
Connection_Pos19_Pos98
19
98
96
6
Connection_Pos20_Pos97
20
97
96
6
Connection_Pos14_Pos102
14
102
95
7
Connection_Pos15_Pos101
15
101
95
7
Connection_Pos16_Pos100
16
100
95
7
Connection_Pos17_Pos99
17
99
95
7
Connection_Pos18_Pos98
18
98
95
7
Connection_Pos19_Pos97
19
97
95
7
Connection_Pos20_Pos96
20
96
95
7
For Consecutive ID, if Pos_B's shifted difference != 1, then we want to subtract 1, so we mark those indexes as -1 with mul(-1) and cumsum them:
df['ID'] = df.Pos_B.shift().sub(df.Pos_B).ne(1).mul(-1).cumsum() + df.Pos_B[0]
For Consecutive Number, if Pos_A's shifted difference != -1, then we want to add 1, so we mark those indexes as 1 and cumsum again:
df['Number'] = df.Pos_A.shift().sub(df.Pos_A).ne(-1).mul(1).cumsum()
Result:
nucleotide Pos_A Pos_B ID Number
0 Connection_Pos20_Pos102 20 102 101 1
1 Connection_Pos19_Pos102 19 102 100 2
2 Connection_Pos20_Pos101 20 101 100 2
3 Connection_Pos18_Pos102 18 102 99 3
4 Connection_Pos19_Pos101 19 101 99 3
5 Connection_Pos20_Pos100 20 100 99 3
6 Connection_Pos17_Pos102 17 102 98 4
7 Connection_Pos18_Pos101 18 101 98 4
8 Connection_Pos19_Pos100 19 100 98 4
9 Connection_Pos20_Pos99 20 99 98 4
10 Connection_Pos16_Pos102 16 102 97 5
11 Connection_Pos17_Pos101 17 101 97 5
12 Connection_Pos18_Pos100 18 100 97 5
13 Connection_Pos19_Pos99 19 99 97 5
14 Connection_Pos20_Pos98 20 98 97 5
15 Connection_Pos15_Pos102 15 102 96 6
16 Connection_Pos16_Pos101 16 101 96 6
17 Connection_Pos17_Pos100 17 100 96 6
18 Connection_Pos18_Pos99 18 99 96 6
19 Connection_Pos19_Pos98 19 98 96 6
20 Connection_Pos20_Pos97 20 97 96 6
21 Connection_Pos14_Pos102 14 102 95 7
22 Connection_Pos15_Pos101 15 101 95 7
23 Connection_Pos16_Pos100 16 100 95 7
Do it one by one then groupby with ngroup
s1 = df.Pos_A.diff().le(0).cumsum()
s2 = df.Pos_B.diff().ge(0).cumsum()
df['out'] = df.groupby([s1,s2]).ngroup()+1
Out[452]:
0 1
1 2
2 2
3 3
4 3
5 3
6 4
7 4
8 4
9 4
10 5
11 5
12 5
13 5
14 5
15 6
16 6
17 6
18 6
19 6
20 6
21 7
22 7
23 7
24 7
25 7
26 7
27 7
dtype: int64
I have two dataframes that need to be mapped (or joined?) based on some condition. These are the dataframes:
df_1
img_names img_array
0 1_rel 253
1 1_rel_right 255
2 1_rel_top 250
3 4_rel 180
4 4_rel_right 182
5 4_rel_top 189
6 7_rel 217
7 7_rel_right 183
8 7_rel_top 196
df_2
List_No time
0 1 38
1 4 23
2 7 32
After mapping I would like to get the following dataframe:
df_3
img_names img_array List_No time
0 1_rel 253 1 38
1 1_rel_right 255 1 38
2 1_rel_top 250 1 38
3 4_rel 180 4 23
4 4_rel_right 182 4 23
5 4_rel_top 189 4 23
6 7_rel 217 7 32
7 7_rel_right 183 7 32
8 7_rel_top 196 7 32
Basically, df_2's each row is populated 3 times to match the number of rows in df_1 and the mapping (if we can say so) is done by the split string in each row of df_1's img_name column. The names of row elements in img_names may have different names, but each of them always starts with the some number (1,4,7 in this case) and an undescore, etc. So I need to split the correspongding number in each row and map it with the row elements of List_No.
I hope the example above is clear.
Thank you.
Looks like you can just extract the digit parts and merge:
df_1['List_No'] = df_1['img_names'].str.split('_').str[0].astype(int)
df_3 = df_1.merge(df_2, on='List_No')
Output:
img_names img_array List_No time
0 1_rel 253 1 38
1 1_rel_right 255 1 38
2 1_rel_top 250 1 38
3 4_rel 180 4 23
4 4_rel_right 182 4 23
5 4_rel_top 189 4 23
6 7_rel 217 7 32
7 7_rel_right 183 7 32
8 7_rel_top 196 7 32
An alternative to #QuangHoang's answer (which I believe you should pick, as it is more robust). This uses the map method, and assumes every value in df2's time is in df1:
df1.assign(
List_No=df1.img_names.str.extract(r"(\d)", expand=False).astype(int),
time=lambda x: x.List_No.map(df2["time"]),
)
img_names img_array List_No time
0 1_rel 253 1 38
1 1_rel_right 255 1 38
2 1_rel_top 250 1 38
3 4_rel 180 4 23
4 4_rel_right 182 4 23
5 4_rel_top 189 4 23
6 7_rel 217 7 32
7 7_rel_right 183 7 32
8 7_rel_top 196 7 32
I have the following df,
code y_m count
101 2017-11 86
101 2017-12 32
102 2017-11 11
102 2017-12 34
102 2018-01 46
103 2017-11 56
103 2017-12 89
now I want to convert this df into a matrix that transposes column y_m to row, make the count as matrix cell values like,
0 1 2 3 4
0 -1 0 2017-11 2017-12 2018-01
1 0 354 153 155 46
2 101 118 86 32 -1
3 102 91 11 34 46
4 103 145 -1 89 -1
in specific, -1 represents a dummy value that indicates either a value doesn't exist for a y_m for a specific code or to maintain matrix shape; 0 represents 'all' values, that aggregates code or y_m or code and y_m, e.g. cell (1, 1) sums the count values for all y_m and code; (1,2) sums the count for 2017-11.
You can use first pivot_table:
df1 = (df.pivot_table(index='code',
columns='y_m',
values='count',
margins=True,
aggfunc='sum',
fill_value=-1,
margins_name='0'))
print (df1)
y_m 2017-11 2017-12 2018-01 0
code
101 86 32 -1 118
102 11 34 46 91
103 56 89 -1 145
0 153 155 46 354
And then for final format, but get mixed values, numeric with strings:
#change order of index and columns values for reindex
idx = df1.index[-1:].tolist() + df1.index[:-1].tolist()
cols = df1.columns[-1:].tolist() + df1.columns[:-1].tolist()
df2 = (df1.reindex(index=idx, columns=cols)
.reset_index()
.rename(columns={'code':-1})
.rename_axis(None,1))
#add columns to first row
df3 = df2.columns.to_frame().T.append(df2).reset_index(drop=True)
#reset columns names to range
df3.columns = range(len(df3.columns))
print (df3)
0 1 2 3 4
0 -1 0 2017-11 2017-12 2018-01
1 0 354 153 155 46
2 101 118 86 32 -1
3 102 91 11 34 46
4 103 145 56 89 -1
I need to find the max of two columns (p_1_logreg, p_2_logreg) where the comparison should be limited only to 14 rows.
My csv file
I tried to slice my index into:
int1_str1_str2_int2_str3_int4
The max should be found between rows where int1, str1, str2 int2 and str3 are fixed, and only the int4 would change (from index 0 to index 13, and so on).
I tried to fix each element at a time and use groupby, but I couldn't iterate over int4 value only.
Here is the code to find the max for column p_1_label, but the result is not what I am looking for.
max_1_row=raw_prob.loc[raw_prob.groupby(raw_prob['id'].str.split('_').str[1])['p_1_'+label].idxmax()]
max_1_row=max_1_row.loc[raw_prob.groupby(raw_prob['id'].str.split('_').str[3])['p_1_'+label].idxmax()]
max_1_row=max_1_row.loc[raw_prob.groupby(raw_prob['id'].str.split('_').str[5])['p_1_'+label].idxmax()]
Any ideas?
I think you need DataFrameGroupBy.idxmax by replaced last _ with empty string and then select by loc:
df = pd.read_csv('myProb.csv', index_col=[0])
idx = df.drop('id', 1).groupby(df['id'].str.replace('_\d+$', '')).idxmax()
print (idx.head(15))
p_0_logreg p_1_logreg p_2_logreg
id
6_PanaCleanerJune_sub_12_ICA 2 9 6
6_PanaCleanerJune_sub_13_ICA 17 19 23
6_PanaCleanerJune_sub_14_ICA 34 37 33
6_PanaCleanerJune_sub_15_ICA 52 51 43
6_PanaCleanerJune_sub_17_ICA 66 67 69
6_PanaCleanerJune_sub_18_ICA 82 79 76
6_PanaCleanerJune_sub_19_ICA 89 87 90
6_PanaCleanerJune_sub_20_ICA 98 103 104
6_PanaCleanerJune_sub_21_ICA 114 117 112
6_PanaCleanerJune_sub_22_ICA 129 133 127
6_PanaCleanerJune_sub_23_ICA 145 146 143
6_PanaCleanerJune_sub_24_ICA 155 166 161
6_PanaCleanerJune_sub_25_ICA 176 173 174
6_PanaCleanerJune_sub_26_ICA 186 191 189
6_PanaCleanerJune_sub_27_ICA 202 203 209
df1 = df.loc[idx['p_1_logreg']]
print (df1.head(15))
id p_0_logreg p_1_logreg p_2_logreg
9 6_PanaCleanerJune_sub_12_ICA_10 0.013452 0.985195 0.001353
19 6_PanaCleanerJune_sub_13_ICA_6 0.051184 0.948816 0.000000
37 6_PanaCleanerJune_sub_14_ICA_10 0.013758 0.979351 0.006890
51 6_PanaCleanerJune_sub_15_ICA_10 0.076056 0.923944 0.000000
67 6_PanaCleanerJune_sub_17_ICA_12 0.051060 0.947660 0.001280
79 6_PanaCleanerJune_sub_18_ICA_10 0.051184 0.948816 0.000000
87 6_PanaCleanerJune_sub_19_ICA_4 0.078162 0.917751 0.004087
103 6_PanaCleanerJune_sub_20_ICA_6 0.076400 0.921263 0.002337
117 6_PanaCleanerJune_sub_21_ICA_6 0.155002 0.791753 0.053245
133 6_PanaCleanerJune_sub_22_ICA_8 0.000000 0.998623 0.001377
146 6_PanaCleanerJune_sub_23_ICA_7 0.017549 0.973995 0.008457
166 6_PanaCleanerJune_sub_24_ICA_13 0.025215 0.974785 0.000000
173 6_PanaCleanerJune_sub_25_ICA_6 0.025656 0.960220 0.014124
191 6_PanaCleanerJune_sub_26_ICA_10 0.098872 0.895526 0.005602
203 6_PanaCleanerJune_sub_27_ICA_8 0.066493 0.932470 0.001037
df2 = df.loc[idx['p_2_logreg']]
print (df2.head(15))
id p_0_logreg p_1_logreg p_2_logreg
6 6_PanaCleanerJune_sub_12_ICA_7 0.000000 0.000351 0.999649
23 6_PanaCleanerJune_sub_13_ICA_10 0.000000 0.000351 0.999649
33 6_PanaCleanerJune_sub_14_ICA_6 0.080748 0.000352 0.918900
43 6_PanaCleanerJune_sub_15_ICA_2 0.017643 0.000360 0.981996
69 6_PanaCleanerJune_sub_17_ICA_14 0.882449 0.000290 0.117261
76 6_PanaCleanerJune_sub_18_ICA_7 0.010929 0.000360 0.988711
90 6_PanaCleanerJune_sub_19_ICA_7 0.010929 0.000351 0.988720
104 6_PanaCleanerJune_sub_20_ICA_7 0.006714 0.000360 0.992925
112 6_PanaCleanerJune_sub_21_ICA_1 0.869393 0.000339 0.130269
127 6_PanaCleanerJune_sub_22_ICA_2 0.000000 0.000351 0.999649
143 6_PanaCleanerJune_sub_23_ICA_4 0.017218 0.000360 0.982421
161 6_PanaCleanerJune_sub_24_ICA_8 0.369685 0.000712 0.629603
174 6_PanaCleanerJune_sub_25_ICA_7 0.307056 0.000496 0.692448
189 6_PanaCleanerJune_sub_26_ICA_8 0.850195 0.000368 0.149437
209 6_PanaCleanerJune_sub_27_ICA_14 0.000000 0.000351 0.999649
Detail:
print (df['id'].str.replace('_\d+$', '').head(15))
0 6_PanaCleanerJune_sub_12_ICA
1 6_PanaCleanerJune_sub_12_ICA
2 6_PanaCleanerJune_sub_12_ICA
3 6_PanaCleanerJune_sub_12_ICA
4 6_PanaCleanerJune_sub_12_ICA
5 6_PanaCleanerJune_sub_12_ICA
6 6_PanaCleanerJune_sub_12_ICA
7 6_PanaCleanerJune_sub_12_ICA
8 6_PanaCleanerJune_sub_12_ICA
9 6_PanaCleanerJune_sub_12_ICA
10 6_PanaCleanerJune_sub_12_ICA
11 6_PanaCleanerJune_sub_12_ICA
12 6_PanaCleanerJune_sub_12_ICA
13 6_PanaCleanerJune_sub_12_ICA
14 6_PanaCleanerJune_sub_13_ICA
Name: id, dtype: object
I have a number of files with 2 or more columns, and I need to split the columns that are not the first based on the first column.
Ex:
1 15 90
4 20 89
1 38 129
4 56 150
4 43 171
1 45 210
So, I need, in file1:
1 15 90
1 38 129
1 45 210
And in file 2:
4 20 89
4 56 150
4 43 170
Can anyone help?
Thanks a lot,
Pedro.
awk '{print > ("file" $1)}' file