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Ask Mathematics

Range of Order Statistic

with a exp(1) distribution find pdf of the range $$X_{(i)} = S $$ $$X_{(n)} = R+S $$ Using joint order statistic $$ f_{ X_{(i)}, X_{(j)} }(u, v) = $$ $$ \frac{ n! }{ (i-1)! (j-1-i)! (n-j)! } [ F_X(u) ]^{i-1} [F_X(v) – F_X(u)]^{j-1-i} [1 – F_X(v)]^{n-j} f_X(u) f_X(v) $$ i get $$ f_{R,S}(r,s) = $$ […]

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Linux Mastering Development Ubuntu

alsamixer USB Headphone/MIC combo cannot control mic

I have attempted everything i have been able to scour the internet for and am at a loss. HyperX Cloud Flight S headphones will not allow me to use the mic whereas their previous non-s revision works perfectly. Here are some relevant outputs: uname -a Linux laptop 5.3.0-42-generic #34-Ubuntu SMP Fri Feb 28 05:49:40 UTC […]

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User Help

OperationalError at /admin/products/product/add/ no such table: main.auth_user__old DJANGO [closed]

main.auth_user__old in django tutorial going through mosh created a web server.When saving some polls or products or set i get this error instead of going to be saved on the site. Heres the error OperationalError at /admin/products/product/add/ no such table: main.auth_user__old Request Method: POST Request URL: http://127.0.0.1:8000/admin/products/product/add/ Django Version: 2.1 Exception Type: OperationalError Exception Value: […]

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Ask Mathematics

Localisation (Algebra) Well defined

I want to show that the multiplication is well defined in the following operation. We have $R$ a commutative Ring. $(r,s)~(r’,s’)$ is defined as $\exists \bar{s}:\ \bar{s}(rs’-r’s)=0 \ \ (*)$. And the multiplication is defined as $\frac{r}{s}\cdot\frac{r’}{s’}=\frac{rr’}{ss’}$, where $\frac{r}{s}$ is means $(r,s)$. I know I have to take two “sets” of pairs, so i would […]

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Development

fgets and sscanf being skipped in c?

In my code I’m making sure the user enteres one of the following abreviated classes however my fgets is causing me a lot of logic errors. char class[3]; char arr3[5]; i = 0; while(i == 0){ printf(“Enter the class, either FR, SO, JR, SR, GR, RFR, or RSO\n”); fgets(arr3, sizeof(arr3), stdin); if(sscanf(arr3, “%s”, class) == […]

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Development

The last dimension of the extracted Mel spectrum is 4

I am new to speech recognition. I plan to extract the Mel spectrum of the audio data, but I print out img.shape and find that its dimension is (650, 20000, 4), and the last dimension is 4, I don’t know why. Below is my code function. def read_wav_data(filename): y, sr = librosa.load(filename, sr=None) return y, […]

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CMS Development Drupal

Big Pipe is breaking ARIA accordion javascript functionality

I’m trying to use this library for accordions on a Drupal 8 site: https://scottaohara.github.io/a11y_accordions/ It works fine when not logged in, but if the user is logged in it doesn’t work. Doesn’t throw an error either. I found that if I copy and paste the full script into the browser console it works so I […]

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Development

How to fit n pixels to canvas in JavaScript? [duplicate]

This question already has an answer here: Size of HTML5 Canvas via CSS versus element attributes 3 answers I am creating a window display in a canvas. First I made an example JSONto test but my code does not work. I want it to display like this (ignore the black lines): But it displays like […]

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Development Python

Python File Encryption (Dictionaries, Files, and Exception)

I am trying to create a program to allow the user to encrypt or decrypt a file. I just don’t know what to do next and another problem is that exiting the program does not always work when I press enter. These are the functions I am required to use. def main(): menuSelection = displayMenuAndGetOption() […]

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Development

Tensorflow.keras.Model served by a Flask app + uwsgi gets stuck in model.predict

I am trying to serve a tensorflow.keras.Model in a Flask + nginx + uwsgi application, using Tensorflow v1.14. I load the model in the constructor of a class named Prediction in my Flask’s application factory function and save the graph as an attribute of the Flask app, as suggested here. Then I run the prediction […]