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Thread: Using scipy.optimize: curve_fit
Post: Using scipy.optimize: curve_fit
| Hey there,
I would like to model exponential data by a curve_fit with scipy. The fit fits well for small x-values, but less so for bigger x-values. Is there anything I can do to improve the overall ... |
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ju21878436312 |
Data Science |
0 |
954 |
Sep-24-2022, 01:15 PM |
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Thread: [Solved:] How to use pd.append() ?
Post: RE: How to use pd.append() ?
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ju21878436312 |
General Coding Help |
3 |
1,284 |
Mar-01-2022, 07:41 AM |
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Thread: [Solved:] How to use pd.append() ?
Post: [Solved:] How to use pd.append() ?
| Can someone tell me, why the first example of how to use pd.append() works, and the second not?
# 1) This works fine:
df1 = pd.DataFrame([[1, 2], [3, 4]], columns=list('AB'))
df2 = pd.DataFrame([[... |
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ju21878436312 |
General Coding Help |
3 |
1,284 |
Feb-28-2022, 12:15 PM |
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Thread: [Solved] Delete a line in a dataframe using .reset_index() and .drop()
Post: RE: Delete a line in a dataframe
| Thank you very much! **dance** |
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ju21878436312 |
General Coding Help |
2 |
2,679 |
Feb-25-2022, 02:55 PM |
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Thread: [Solved] Delete a line in a dataframe using .reset_index() and .drop()
Post: [Solved] Delete a line in a dataframe using .rese...
| Hi out there,
I'd like to delete a line in the dataframe "df_new". Why does it not work? I get the error: "KeyError: '[0] not found in axis".
import pandas as pd
import numpy as np
data = {'x': [... |
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ju21878436312 |
General Coding Help |
2 |
2,679 |
Feb-25-2022, 01:14 PM |
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Thread: [solved] iteration + df.loc
Post: RE: [solved] iteration + df.loc
| Thank you, I'll use your method! |
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ju21878436312 |
General Coding Help |
2 |
1,320 |
Feb-15-2022, 01:59 PM |
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Thread: [solved] iteration + df.loc
Post: [solved] iteration + df.loc
| I'd like to iterate through the lines by a for loop.
And when the condition "df['col2'] == "second"is true, I'd like to do some calculations in this line in column df["col3"], e.g. df.loc[i, "col3"] ... |
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ju21878436312 |
General Coding Help |
2 |
1,320 |
Feb-15-2022, 08:14 AM |
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Thread: [Solved] Matplotlib - Tricontour: how to set colorbar range
Post: RE: [Solved] Matplotlib - Tricontour: how to set c...
| I found the solution by myself: via levels you can specify the exact vector for the colorbar range.
levels =[0.1,0.2,0.3,0.4] |
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ju21878436312 |
General Coding Help |
1 |
6,590 |
Dec-13-2021, 07:44 PM |
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Thread: [Solved] Matplotlib - Tricontour: how to set colorbar range
Post: [Solved] Matplotlib - Tricontour: how to set color...
| I would like to set the colorbar range, when plotting my data, using tricontour.
What I have tried:
vmin=0.13, vmax=0.4
to enforce min and max, but it did not show any difference.
plt.clim(0.13,0... |
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ju21878436312 |
General Coding Help |
1 |
6,590 |
Dec-13-2021, 07:43 PM |
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Thread: Access specific value in df
Post: RE: Access specific value in df
| Hi,
I think the first mistake was to do a substraction between 'Timestamp' and 'str', as the error was TypeError: unsupported operand type(s) for -: 'DatetimeArray' and 'str'But if I change the 'str'... |
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ju21878436312 |
Data Science |
2 |
2,023 |
Aug-18-2021, 08:24 AM |
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Thread: Access specific value in df
Post: Access specific value in df
| Hi there,
Is there a way to assign a time difference to the whole column, from a certain row on?
How do I access e.g. the value in row 2, column 0?
import pandas as pd
import numpy as np
df = pd.re... |
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ju21878436312 |
Data Science |
2 |
2,023 |
Aug-16-2021, 09:44 AM |
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Thread: [Solved] df.loc: write data in certain rows
Post: RE: df.loc: write data in certain rows
| I found the solution:
# write data in column 'Comment', only for certain rows creates KeyError
df.loc[(df['Date_Time'] >= '2021-06-10 09:50:31')&(df['Date_Time'] < '2021-06-10 09:51:00'),... |
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ju21878436312 |
General Coding Help |
1 |
1,701 |
Jun-28-2021, 06:49 AM |
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Thread: [Solved] df.loc: write data in certain rows
Post: [Solved] df.loc: write data in certain rows
| I import a text file and would like to write a comment in certain rows, which I access with df.loc.
However, I get the error "# When setting, missing keys are not allowed, even with .loc:".
Could some... |
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ju21878436312 |
General Coding Help |
1 |
1,701 |
Jun-28-2021, 06:48 AM |
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Thread: Pandas datetime: add timedelta
Post: RE: Pandas datetime: add timedelta
| Hi there, sorry for the late reply.
The attempts did non work, as the columns were not interpreted as datetimes. I solved it this way:
df = pd.read_csv('minimal_in.txt', delimiter= '\t',parse_dates=... |
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ju21878436312 |
Data Science |
3 |
6,759 |
Jun-23-2021, 08:09 AM |
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Thread: [solved] dataframe and read_csv
Post: RE: dataframe and read_csv
| @snippsat: Thank you very much for the useful comments! **dance** |
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ju21878436312 |
General Coding Help |
4 |
2,894 |
Jun-16-2021, 06:01 AM |
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Thread: [solved] dataframe and read_csv
Post: RE: dataframe and read_csv
| Thank you. I actually need to further evaluate the data. And if I try it directly with data, I get:
data.dtypes
AttributeError: 'tuple' object has no attribute 'dtypes'or
data.loc[data['MyColumn2']... |
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ju21878436312 |
General Coding Help |
4 |
2,894 |
Jun-15-2021, 01:26 PM |
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Thread: [solved] dataframe and read_csv
Post: [solved] dataframe and read_csv
| Aim: I would like to convert data, read with read_csv and convert it to a dataframe.
What I've tried: 1. data = pd.read_csv(...) 2. pd.DataFrame(data)
Problem: The columns are not shown in the datafr... |
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ju21878436312 |
General Coding Help |
4 |
2,894 |
Jun-15-2021, 09:44 AM |
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Thread: [Solved] df.to_excel: certain rows
Post: RE: df.to_excel: certain rows
| (May-26-2021, 06:21 AM)perfringo Wrote: One way is to feed .to_excel with filtered dataframe. For first three rows it would be:
df.iloc[:3].to_excel(writer, startrow=1, sheet_name='row_1_to_3')
T... |
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ju21878436312 |
Data Science |
2 |
3,276 |
Jun-15-2021, 09:32 AM |
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Thread: Reset seaborn
Post: RE: Reset seaborn
| (May-26-2021, 01:55 AM)Larz60+ Wrote: reset_defaults() see: https://seaborn.pydata.org/generated/sea...t_defaults
Restore all RC params to default settings.
reset_orig() see: https://seaborn.py... |
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ju21878436312 |
Data Science |
2 |
5,058 |
Jun-15-2021, 09:31 AM |
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Thread: Reset seaborn
Post: Reset seaborn
| Hi there,
Following some tipps I somehow changed some global settings in seaborn and I would like to reset everything concerning seaborn and matplotlib.
It seems I shifted the y-axis somehow.
impor... |
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ju21878436312 |
Data Science |
2 |
5,058 |
May-25-2021, 05:40 PM |
