All Questions
450 questions
0
votes
0
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89
views
How to efficiently use NumPy's StringDType for string operations (e.g., joining strings)?
I'm trying to perform string operations with NumPy's StringDType.
As an example, I've attempted to join strings with a separator row-wise. In the past, NumPy's string operations were somewhat slower ...
- 393
2
votes
1
answer
77
views
Convert numpy float to string
import numpy as np
number = np.float32(0.12345678)
assert str(number) == "0.12345678"
assert f"{number}" == "0.12345678359270096"
Why is this different when converting ...
- 86
0
votes
1
answer
261
views
Converting Byte Array to String Using NumPy Dtype Only. Python
I'm working on a task where I need to convert a byte array obtained from a hexadecimal string into a string representation, utilizing only the specified data type (dtype) in NumPy. Here's what I've ...
- 21
1
vote
2
answers
69
views
str giving only one element as output but object fix the problem
I have to write a python code, there are a function and it receive a tuple as parameter where all the elements of tuple are numpy array. The output of that code will give me unique hobbies from this ...
- 11
0
votes
2
answers
70
views
Get rid of format string conflict when using sympy
When I try to use sympy to find the derivative of the loss function, it raises a conflict with format string.
import numpy as np
import sympy as sp
def predict(X, w, b):
return np.dot(X, w) + b
...
- 393
0
votes
2
answers
114
views
Different behavior of rjust with strings vs numpy strings
I am seeing a difference in behavior in rjust() when used on a string vs on a numpy string.
My goal is to fill a number string with 0s. I am seeing a difference in behavior when calling rjust on a ...
- 3
0
votes
1
answer
44
views
Switching dataframe integers to string so i can add text like '$' and '5.78 / Million' into the dataframe
I made a dataframe with all the necessary information, however, my manager wants me to remove decimals from all entries except col['REVENUE'] x index['Volume']. Aka keep 5.78 and remove the trailing ...
- 15
0
votes
1
answer
47
views
Filtering on very large array of 3 possible values
I have a 2D array of 0s, 1s and 2s with very large number of columns. I am trying to select only those rows which have consecutive zeros not exceeding certain number. My method is to convert the array ...
- 571
1
vote
1
answer
37
views
Add string Column B where string exists in column Columns A + np.where() + pandas
I need to add a secondary ID in a dataset with unique entries for multiple individuals. To do so I am trying to use np.where(), after I implemented I realized I am overwriting the last entry each time....
- 884
1
vote
4
answers
387
views
Why full function in NumPy can't take dtype=str
Why i see just one letter instead of "cube"
When i didn't type dtype="str" it worked.
My question is why?
code:
np.full((3,3,3),"cube",dtype=str)
results:
array([[['c', '...
- 39
0
votes
3
answers
75
views
Converting an array of numpy strings into floats with the same sigfigs as string
I want to convert the numpy array ['800' '0' '0.3048' '71.3' '0.00266337'] to float form with the sigfigs shown in the strings.
When I tried (with help from this answer
X_new = X_tr.astype(float)
I ...
0
votes
1
answer
945
views
Is there a way to cast the type of an element in a numpy array to a type that is written in a seperate string
I need to cast the type of an element in a numpy array to another type that is written in a seperate string(for example "int"). I have an assignment to submit and this was one of the ...
0
votes
1
answer
2k
views
python error UFuncTypeError: ufunc 'add' did not contain a loop with signature matching types
i'm new to python and i'm having an issue executiong this piece of code:
import numpy as np
DatetimeIndex(['1990-03-31', '1990-06-30', '1990-09-30', '1990-12-31',
'1991-03-31', '1991-...
1
vote
1
answer
50
views
np.searchsorted not working properly on netCDF4 array
np.searchsorted is not finding the right indexes but i think it is related to the type of data.
To me it looks like this function can't tell floats and strs apart but I can't convert the array to ...
0
votes
5
answers
195
views
How to convert a string to numpy array? [duplicate]
Converting string to numpy array
Given a string abcxyz, I want it to return a numpy array like:
array(["a", "b", "c", "x", "y", "z"]).
I ...
- 3