I was trying to calculate the week number starting from first Monday of October. Is there any functions in pandas or datetime to do the calculation efficiently? MWE Answer Shift dates by the number of days to new year, they use standard Monday week number formatting (%W): The offset in days can be calculated …
Tag: python
Is there a way to use mutual information as part of a pipeline in scikit learn?
I’m creating a model with scikit-learn. The pipeline that seems to be working best is: mutual_info_classif with a threshold – i.e. only include fields whose mutual information score is above a given threshold. PCA LogisticRegression I’d like to do them all using sklearn’s pipeline obje…
Value error in convolutional neural network due to data shape
I am trying to predict the of number peaks in time series data by using a CNN and keep on getting a data shape error. My data looks as follows: X = list of 520 lists (each is a time series) of various lengths (shortest = 137 elements, longest = 2297 elements) y = list with 520 elements, each being
Sort multiIndex table based on other table
I have a multiIndex data frame like this and I have another similar table whose index is Patient_1, Patient_2 and Patient_3. I want to order my table like that. Patients are actually names and the number of patients can change depending on the input data. In the table I want to re-order, there are 10 rows per…
Passing IP address isn’t working in a Function, unless I explicitly mention it
I’m trying to find the Country name for the given IP address using the ‘GeoIP2-City.mmdb’ file. Ex: IP: 24.171.221.56, I need to get ‘Puerto Rico’. But this isn’t working when I passed the IP address in a function. However, If I use the actual IP address in the function it …
Order in dataframe generation
Could you explain to me why the Properties column was the third column and not the first one? As you can see I insert it as the first in pd.DataFrame, but when I do print(df), it appears as the third column. Answer Try using columns argument to assign the order of columns: This gives:
Django: Horizontal scaling with a single database
I have a single django instance about to hit its limits in terms of throughput. Id like to make a second instance and start scaling horizontally. I understand when dealing with database read replicas there is some minimal django configuration necessary, but in the instance of only using a single database: is …
Define correct scipy.signal.spectrogram input parameters
I have the following code: which is giving me the following plot: What is the correct way to define the correct parameters, namely: nperseg, nfft and noverlap to obtain a correct and smooth plot? Thank you! Plot of the input signal: Answer I was able to solve this issue by normalising the input signal and doi…
Need to have the correct url path in Django
I am trying to get my Django app to point to the correct URL in my chatserver/urls.py file. I am getting this error when I start my django app: Using the URLconf defined in chatserver.urls, Django tried these URL patterns, in this order: admin/ join [name=’join’] The empty path didn’t match any of…
Trying to Count Faces Using OpenCV, Haar Cascades and Raspberry PI
So I have a project for a trail camera to count people entering the trail by detecting their faces. There isn’t any power available so I am stuck using a Raspberry Pi 3 B+ for power reasons. I am currently using opencv and Haar cascades to detect faces. My problem is two-fold. The first one is that my c…