I need to find unique rows in a numpy.array. For example: >>> a # I have array([[1, 1, 1, 0, 0, 0], [0, 1, 1, 1, 0, 0], [0, 1, 1, 1, 0, 0], [1, 1, 1, 0, 0, 0], [...
I'm trying to run over the parameters space of a 6 parameter function to study it's numerical behavior before trying to do anything complex with it so I'm searching for a efficient way to do this. My...
I would like to use a numpy array in shared memory for use with the multiprocessing module. The difficulty is using it like a numpy array, and not just as a ctypes array. from multiprocessing import...
I have two numpy arrays that define the x and y axes of a grid. For example: x = numpy.array([1,2,3]) y = numpy.array([4,5]) I'd like to generate the Cartesian product of these arrays to generate:...
I have a pandas dataframe in which one column of text strings contains comma-separated values. I want to split each CSV field and create a new row per entry (assume that CSV are clean and need only be...
That is the difference between groupby("x").count and groupby("x").size in pandas ? Does size just exclude nil ?
I have an array X: X = np.array([[4, 2], [9, 3], [8, 5], [3, 3], [5, 6]]) And I wish to find the index of the row of several values in t...
Lets say I have a Python Numpy array array a. numpy.array([1,2,3,4,5,6,7,8,9,10,11].) I want to create a matrix of sub sequences from this array of length 5 with stride 3. The results matrix hence ...
Is it worth my learning NumPy? I have approximately 100 financial markets series, and I am going to create a cube array of 100x100x100 = 1 million cells. I will be regressing (3-variable) each x with...
I am trying to implement a "Digit Recognition OCR" in OpenCV-Python (cv2). It is just for learning purposes. I would like to learn both KNearest and SVM features in OpenCV. I have 100 samples (i.e. ...