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Thread: Ordering of pandas DataFrame
Post: RE: Ordering of pandas DataFrame
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new_to_python |
Data Science |
5 |
2,356 |
Mar-15-2020, 06:08 PM |
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Thread: Ordering of pandas DataFrame
Post: RE: Ordering of pandas DataFrame
| Hi, anybody knows the answer? |
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new_to_python |
Data Science |
5 |
2,356 |
Mar-15-2020, 02:27 PM |
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Thread: Why any(0) does not work here?
Post: RE: Why any(0) does not work here?
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new_to_python |
General Coding Help |
2 |
1,864 |
Mar-15-2020, 02:15 PM |
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Thread: Why there is a star inside randn?
Post: RE: Why there is a star inside randn?
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new_to_python |
General Coding Help |
4 |
2,547 |
Mar-06-2020, 04:45 AM |
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Thread: Why there is a star inside randn?
Post: RE: Why there is a star inside randn?
| Thanks. How can I tell if size is an integer or a tuple of integers?
Is the number of elements in the tuple corresponds to the dimension of the nd-array? For example if size is a tuple of (x, y), the... |
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new_to_python |
General Coding Help |
4 |
2,547 |
Mar-05-2020, 02:20 PM |
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Thread: Why there is a star inside randn?
Post: Why there is a star inside randn?
| Hi, I have question about generating a linear model from random data. I suppose that by default, the value of size in the dnorm function is one. When this function is called with N=100, size becomes 1... |
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new_to_python |
General Coding Help |
4 |
2,547 |
Mar-04-2020, 01:02 AM |
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Thread: Using shift to compute the percent change in a time series
Post: RE: Using shift to compute the percent change in a...
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new_to_python |
Data Science |
6 |
4,233 |
Mar-03-2020, 07:50 PM |
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Thread: How to obtain values under All when the margins of pivot_table is set to True?
Post: How to obtain values under All when the margins of...
| Hi, anybody knows how the values under All (both row and column) were calculated. I heard that by setting margins equals to True, the values under All are the group statistics. I added the values in t... |
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new_to_python |
Data Science |
0 |
1,574 |
Mar-03-2020, 02:54 PM |
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Thread: Using shift to compute the percent change in a time series
Post: RE: Using shift to compute the percent change in a...
| Everything you wrote in Post#4 makes sense when we treat x as a time series data. For example, x[0] is the starting position of a dog. x[1] is the position 1s later, x[2] is its position 2s later, etc... |
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new_to_python |
Data Science |
6 |
4,233 |
Feb-22-2020, 11:30 PM |
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Thread: Using shift to compute the percent change in a time series
Post: RE: Using shift to compute the percent change in a...
| Thanks. By using 1.207707 as the old value and -0.558628 as the new value, I got -1.462553 as calculated by ts/ts.shift(1)-1. How come 1.207707 is the old value? The original (old) value in ts on 200... |
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new_to_python |
Data Science |
6 |
4,233 |
Feb-22-2020, 05:37 PM |
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Thread: Using shift to compute the percent change in a time series
Post: Using shift to compute the percent change in a tim...
| Hi, somebody mentioned that one could use ts/ts.shift(1)-1 to calculate the percent changes in a time series. I tried to understand this by hand calculating the percent changes on 2000-04-30. I got -3... |
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new_to_python |
Data Science |
6 |
4,233 |
Feb-21-2020, 11:23 PM |
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Thread: Why replace treats an integer value 999 as 999.0?
Post: RE: Why replace treats an integer value 999 as 999...
| (Feb-11-2020, 07:49 PM)new_to_python Wrote: (Feb-11-2020, 02:54 PM)DeaD_EyE Wrote: import struct
def double_to_bin(value):
"""
Convert an float to double (64 bit) binary representation
... |
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new_to_python |
General Coding Help |
10 |
4,462 |
Feb-16-2020, 01:49 PM |
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Thread: Does the order of columns in the DataFrame matter?
Post: RE: Does the order of columns in the DataFrame mat...
| Thanks. I tried A_new = A.reindex(['Ohio', 'Colorado'], axis=1, level=1) but it returned:
IndexError: Too many levels: Index has only 1 level, not 2 |
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new_to_python |
Data Science |
11 |
6,152 |
Feb-16-2020, 03:05 AM |
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Thread: Does the order of columns in the DataFrame matter?
Post: RE: Does the order of columns in the DataFrame mat...
| Thanks. I am trying to reorder the columns of DataFrame in line[236] of Post #5 manually. I did:
A = df.unstack('state').stack('side')
A = A[['Ohio', 'Colorado']]But I got ['Colorado'] not in index ... |
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new_to_python |
Data Science |
11 |
6,152 |
Feb-15-2020, 02:05 PM |
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Thread: Why replace treats an integer value 999 as 999.0?
Post: RE: Why replace treats an integer value 999 as 999...
| Hi DeaD_EyE, the binary representation of 999 is: 1111100111
How come your code produced a very very long binary representation which is different from 1111100111? |
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new_to_python |
General Coding Help |
10 |
4,462 |
Feb-14-2020, 07:11 PM |
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Thread: Does the order of columns in the DataFrame matter?
Post: RE: Does the order of columns in the DataFrame mat...
| Thanks scidam. In this case, what is the best way to change the order back to the original? So as long as I refer the columns by names (preferred method) or in the case of index based method use somet... |
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new_to_python |
Data Science |
11 |
6,152 |
Feb-14-2020, 02:21 PM |
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Thread: Does the order of columns in the DataFrame matter?
Post: RE: Does the order of columns in the DataFrame mat...
| Thank you very much.
By the way, what do you think is the cause of the re-ordering between Ohio and Colorado from Step 235 to 236?
In [234]: df ... |
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new_to_python |
Data Science |
11 |
6,152 |
Feb-14-2020, 01:36 AM |
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Thread: Does the order of columns in the DataFrame matter?
Post: RE: Does the order of columns in the DataFrame mat...
| Thanks. I came across the following example:
# Example 2
In [194]: lefth = pd.DataFrame({'key1': ['Ohio', 'Ohio', 'Ohio', 'Nevada', 'Nevada'],
...: 'key2': [2000, 2001, 2... |
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new_to_python |
Data Science |
11 |
6,152 |
Feb-13-2020, 05:12 PM |
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Thread: Does the order of columns in the DataFrame matter?
Post: Does the order of columns in the DataFrame matter?
| Hi, I noticed that sometimes when doing certain operations, the order of the columns in the DataFrame got changed automatically. Same thing happened when I tried out some examples in books. Using the ... |
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new_to_python |
Data Science |
11 |
6,152 |
Feb-12-2020, 04:11 PM |
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Thread: Why replace treats an integer value 999 as 999.0?
Post: RE: Why replace treats an integer value 999 as 999...
| (Feb-11-2020, 02:54 PM)DeaD_EyE Wrote: import struct
def double_to_bin(value):
"""
Convert an float to double (64 bit) binary representation
Please check here: http://www.binaryconvert... |
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new_to_python |
General Coding Help |
10 |
4,462 |
Feb-11-2020, 07:49 PM |
