I have 16 2d-arrays, each in a shape of [16000, 16000], which means one array has 256000000 cells. I want to have a std_array that is the standard deviation of each cell in the 16 arrays. I tried something but failed, and my questions are in bold. Here’s my attempt. For example (simplified 3*3 arrays): However, the np.std function only
Tag: arrays
How to use the value of a 2d array as an index to a 3d array in numpy?
I have a 2d array, A, with shape (n x m), where each element of the array at position (i,j) holds a third value k. I want to increment a 3d array with dimensions nxmxl at position (k,i,j) based on the 2d array value and position. So for example if How do you do this in numpy efficiently? Answer The
I have an error in my code the current error is a TypeError: ‘NoneType’ object is not subscriptable
This is my current code, I get the error The data looks something like this, I just want to add the data from the code, when bought, when sold, into the last 2 columns in the data, then i will plot the data. Thanks In Advance Answer Your MyStrat function does not return anything, so you’re basically trying to get
Cannot Change Individual Elements in an Array
I am trying to make a tic-tac-toe game, and I currently have a 3×3 tiled board grid to represent the game. When a user clicks a square, the program sets board[x][y] to 1. board = [[[0, 0, 0], [0, 0, 0], [0, 0, 0]] Unfortunately, whenever I click a tile, it seems to ignore whatever x value I put; every
How to add elements of a 1D NumPy array to NumPy subarrays with the same index?
Let’s say I have a NumPy array a with shape (3, 5, 7) and a 1D NumPy array l with shape (3, 1). I want to add the 0th element of l to the 0th subarray in a, the 1st element of l to the 1st subarray of a, and the 2nd element of l to the 2nd and last
How to update key of dictionary inside a JSON file?
This is an example of what’s in my JSON file: How would I change the male’s key (which is 0) and add one using “+=” in python? I wan a command to update the key of male or female. I don’t want to CHANGE 0 into 1, but I want to “+=” to that 0 so that I can update
How to take n block of a 3d array in python?
I had 328 grayscale images with the size 128*128 and I convert all of them into a 3D array with the shape (128,128,328). Now I want to convert it into 5 separated 3d arrays with the shape of (128,128,64) without changing in sequence. As you can see 328 is not divisible by 64 and using dsplit function is not working.
Changing specific elements in a list of list of numpy arrays
I have a list of lists of numpy arrays. I would like to loop through the list of lists and change certain elements. Below is an example, but just with integers: The i==j element has been changed to something else. When I run the exact same code logic, but with 2×2 numpy arrays, I cannot get it to do the
Does a JS equivalent of Python’s Multiple Variable Assignment exist?
Python has a succinct way of assigning a function with a parameter to multiple variables, done as a one-liner. I would like to know whether JavaScript has the same, or similar way of doing that. I have found several examples describing multiple variable assignments for JavaScript, using multiple assignments and Destructuring. The issue with these methods is that they can,
Part specification along different axes of numpy array
Why is arr[0:5][0:10] the same as arr[0:10][0:5] and what should I write if I want to get the array with shape (10,5)? In the process of trying to crop a 2D numpy array I end up with the wrong dimensions. Ok, I figure, I just got my axes switched up, so I switch the order of the part specification.. and