Random shuffling of an array

I need to randomly shuffle the following Array: int[] solutionArray = {1, 2, 3, 4, 5, 6, 6, 5, 4, 3, 2, 1}; Is there any function to do that?

Fastest way to do horizontal SSE vector sum (or other reduction)

Given a vector of three (or four) floats. What is the fastest way to sum them? Is SSE (movaps, shuffle, add, movd) always faster than x87? Are the horizontal-add instructions in SSE3 worth...

Algorithm for Shuffling a Linked List in n log n time

I'm trying to shuffle a linked list using a divide-and-conquer algorithm that randomly shuffles a linked list in linearithmic (n log n) time and logarithmic (log n) extra space. I'm aware that I...

non-repeating random numbers

I need to generate around 9-100 million non-repeating random numbers, ranging from zero to the amount of numbers generated, and I need them to be generated very quickly. Several answers to similar...

SQL71501 - How to get rid of this error?

We're using two schemas in our project (dbo + kal). When we are trying to create a view with the following SQL statement, Visual Studio shows as an error in the error list. CREATE VIEW...

PHP mkdir doesn't work anymore

So I have this code, at first mkdir was working fine until I wanted to tweak it a bit with $category and $random, even now if I reverse it it doesn't work maybe you can help me? Also how to...

Android Chromecast Seeking behavior - Restarts Video from begining

I am trying to implement a custom seek (forward/rewind) functionality on top of Google's CastCompanionLibrary-android. I'm noticing a strange behavior where despite the user seeking to a non-zero...

What does the line of code `np.transpose(image_tensor, (2, 1, 0))` do?

I was looking at some code and there was a line that said: # transpose to standard format # You might want to comment this line or reverse the shuffle # if you will use a learning algorithm like...

Using sklearn cross_val_score and kfolds to fit and help predict model

I'm trying to understand using kfolds cross validation from the sklearn python module. I understand the basic flow: instantiate a model e.g. model = LogisticRegression() fitting the model e.g....

builtin_function_or_method' object has no attribute shuffle

Hi I am trying to define a function that returns a shuffled list l1 without changing the original list l using the method random.shuffle but I got this error message: builtin_function_or_method...

Shuffle JButton position inside JPanel

I've made 9 buttons inside JPanel using netbeans IDE 8.2, but I am confused how to make the position of 9 buttons to be random. This is my code: /* * To change this license header, choose...

omxplayer (raspian) playing video folder on shuffled loop

I cannot find a way to use omxplayer in a shell script to play videos in a folder in a random "shuffle" order. I would like it to loop through a "playlist" but so far I have only been able to find...

Mixing multiple tf.data.Dataset?

I have three datasets D1, D2, D3, that are outputting the same type of data. What I'm trying to do is to output randomdly D1 or D2 or D3 from one unique pipeline. I tried to use...

efficient way of generating semi-random sequences

Quite often, I have to generate sequences of numbers in some semi-random way, which means that it is not totally random, but has to have some other property. For example we need a random sequence...

validation accuracy is not increasing training ResNet50

I was doing fine-tuning with ResNet50 model for face recognition using data agumentation, but observed that the model accuracy was increasing but validation accuracy from the very starting point...

How to fix "ValueError: Expected input batch_size (1) to match target batch_size (4)."?

I'm training a pytorch neural network on google colab to classify sign langauge alphabets of 29 classes in total. We've been fixing the code by changing various params but it won't work anyway. ...

Trying to generate & display non-repeating random values for a BINGO game

I am working on making a bingo game. I've gotten as far as being able to get a random number generated and displayed at the click of a button. My only issue is that some values will end up being...

RuntimeError: Given groups=1, weight of size 16 1 5 5, expected input[100, 3, 256, 256] to have 1 channels, but got 3 channels instead

I try to run the following programe for images classification problem in Pytorch: import torch import torch.nn as nn import torchvision import torchvision.transforms as transforms import...

Run Tensorflow on CPU only

I'm trying to run the TensorFlow sample from the advanced quick start guide, but it just hangs with these three lines: 2019-11-25 18:24:37.609515: I...

CNN training loss regular spikes at the end of the epoch

I am training a CNN in PyTorch with Adam and the initial learning rate is 1e-5. I have 5039 samples in my epoch and the batch size is 1. I have observed that I have a regular spike pattern of...

Why does joblib parallel execution make runtime much slower?

I want to shuffle values in a 3D numpy-array, but only when they are > 0. When I run my function with a single core, it is much faster than with even 2 cores. It is way beyond the overhead of...

Tensorflow: Unsupported callable

I tried following the tutorial on the tensorflow website https://www.tensorflow.org/tutorials/estimator/linear It is a code to use linear regression but I'm not able to do so due to specified...

StratifiedKFold vs KFold in scikit-learn

I use this code to test KFold and StratifiedKFold. import numpy as np from sklearn.model_selection import KFold,StratifiedKFold X = np.array([ [1,2,3,4], [11,12,13,14], ...

How to apply chain rule to multiple tf.GradientTape?

I'm studying pipeline model parallelism with TensorFlow 2 and MPI. But I can't figure out how to apply the chain rule when using multiple tf.GradientTape across multiple processes. Here is the...

How to preprocess a dataset for BERT model implemented in Tensorflow 2.x?

Overview I have a dataset made for classification problem. There are two columns one is sentences and the other is labels (total: 10 labels). I'm trying to convert this dataset to implement it in...

AttributeError: module 'utils' has no attribute 'read'

I'm trying to train a model using PyTorch and I got this error AttributeError: module 'utils' has no attribute 'read' In the main project I have the file utils.pyx and also I'm getting an error in...

Exception encountered when calling layer "sequential"

I am attempting to build a text generator using tensorflow and keras. I am using code from the train.py file that can be found on the following website:...

Constrained Logistic Regression (outcome variable) in Python

In order to predict future stock movements, we use a logistic regression in Python. We do so by converting the daily return into a weekly return.Next, we determine if the return is going up or...

Adding words to the list in the correct order

I'm trying to adjust the words to form the sentence in the correct order. Like this. Or like Duolingo sentence examples. (without drag and drop, just lists and/or maps) Sentence: static String...

Randomize non-diagonal elements of symmetric matrix

I have a symmetric matrix that I want to randomly shuffle while keeping the diagonal elements unchanged. The rows all sum to 1 and should still sum to 1 after shuffling. Toy example below: A <-...