I have written the following code to plot 6 pie charts in different subplots, but I get an error. This code works correctly if I use it to plot only 2 charts, but produces an an error for anything more than that. I have 6 categorical variables in my dataset, the names of which are stored in the list cat_cols.
Tag: numpy
Pandas get column values based on duplicate rows
I have a sample DF: OP: I am trying to get the values of columns – “A” and “B” wherever there are duplicate values in column col. For example the column col has value Apple in index – 0,1,3,5 and I am trying to get the respective values in column – A and B, ie I have …
Why do coefficient of determination, R², implementations produce different results?
When attempting to implement a python function for calculating the coefficient of determination, R², I noticed I got wildly different results depending on whose calculation sequence I used. The wikipedia page on R² gives a seemingly very clear explanation as to how R² should be calculated. My numpy interpreta…
Numpy find maximum tuple in array of windows
I’m starting our with list of tuples (each tuple is an (X,Y)). My end result is I want to find the maximum Y-value within EACH window/bin of length 4 using numpy. Expected output I want from each window/blocks using max y-value is below. Alternatively format could be regular list of tuples, doesn’…
is there any way to calculate L2 norm of multiple 2d matrices at once, in python?
for example, I have a matrix of dimensions (a,b,c,d). I want to calculate L2 norm of all d matrices of dimensions (a,b,c). Is there any way to use numpy.linalg.norm with out any looping structure? I mean, the resultant array should be 1 x d Answer How about this?
Data_Frame Error – ValueError: Can only compare identically-labeled Series objects
I have two data_frames, as below: The task is to create a data_frame(below one), where I need to add df_marks[‘Int1/40’] & df_marks[‘Int2/40’], if df_name[‘Student_ID’] == df_marks[‘Student_ID’] I tried But its giving error as, Do we have any simple way to d…
TypeError: only size-1 arrays can be converted to Python scalars when using trapz method
This is my python code And am getting this error: Why is that so? Integration using quad method worked fine but not with trapz method Answer As a user commented, you can only use math functions with scalar values, for arrays you have to use math functions provided in NumPy library.
Smoothing Categorical Output
I have a list of outputs obtained from a cow behavior detection model. Even in a video when a cow is laying, often time it identifies as standing and vice versa. In each video frame, a classification result is given by the model and we are appending it into a list. Let’s assume after 20 frames, we have …
Create an array of repeating values with numpy
Given the following array, where the elements in the array are a value at index [0], and its frequency at index [1]. I need an array that is the length of the sum of the frequencies, filled with v, based on their respective frequency. This can be done with How can I do this with a vectorized numpy method? No
‘BACKTICK_QUOTED_STRING__AT_key’ is not defined for Pandas Querying function
Trying to get a hold of pd.query function Getting an error UndefinedVariableError: name ‘BACKTICK_QUOTED_STRING__AT_key’ is not defined for the below pandas Python code. What did I do wrong? Answer Try this : or