I giving start and stop values as parameters to the linspace function Stop value is normally does not include in the array. Because of this we always write [stop+1] in order to make include the stop value. But in linspace, if i write the output is: Why linspace function output includes the stop value when ara…
Tag: numpy
how to split a list of numpy arrays and concatenate arrays of euch sublists in python
I have a list of numpy arrays and want to firstly split the list and then concatenate all the arrays exiting in each sublist. Number of sublists is defined by: this is my list: The length of all_data is 8 and it should be firstly modified to be a list of n_sublist lists. I mean two sublists which first one
Can I use numpy to replace values in an array, rather than generating a new array?
I feel like this can be easily accomplished. I have the following code: I might be wrong, but I think np.random.uniform() generates a whole new array, and then the my_array variable simply points to the new array, while the old array gets garbage collected. Since I’m positive that the new array will hav…
Jupyter-notebook failed to import python packages
I was trying to use numpy in Jupyter Notebook in a Python3 virtual environment, but the encountered an error. In terminal, I did: And on the Jupyter page, I created a new notebook and executed the followings And the resulting output is this: The package is already installed but still cannot be found…? I…
Plotting average linear regression of data set consisting of missing values
I was trying to plot a linear graph using m,b = np.polyfit(x0, y0, 1) function however when I print m2,b2,m3,b3 I get nan. from the empty values. How do I fix this? Answer You seem to have a typo in It would probably help to rename the variables idxy12,idxy13 and idxy14 or so. You also could write all this wi…
python transform 1d array of probabilities to 2d array
I have an array of probabilities: and I want to make it 2d array: What is the best way to do so? Answer One idea is use numpy.hstack: Or use numpy.c_:
how to find perpendicular projection of point on a surface in python
I have a bunch of points in 3d space (x,y and z) and want to find their perpendicular projection on a surface in python. My surface is created by four points using the following function: These are my input points stored as list for creating the surface: I want to ind the perpedicular projection of the follow…
Accumulate sliding windows relative to origin
I have an array A with the shape (3,3) which can be thought of as the sliding window view of an unkown array with the shape (5,). I want to compute the inverse of windowing the array with the shape (5,). The adjoint operation of this will be summation. What I mean is that I want to accumulate the values
Loop through and add values to array via for loop
Morning, I am trying to add all my values of Distance and Speed to an array, so I can plot them with PLT. However, python is only appending 1 value, why? What am I doing wrong? Code and output below: ”’ output: ”’ AS you can see the array is ONLY showing Distance and same distance agai…
how to remove NaN from numpy subarray
I have following numpy array: I want to drop all subarrays with nan values. Desired output is: I ended with trying with np.isnan(array) , but I got error ufunc ‘isnan’ not supported for the input types . One idea while writing this is to split array in two arrays and get nan indexes and apply filt…