Understanding NumPy split function to extract sub-grid

So I was given a worksheet exercise as follows:

Given the following grid of 25 values, extract the central 3 x 3 sub-grid of 9s from the larger grid using the split() function:
```
1 2 3 4 5
1 9 9 9 5
1 9 9 9 5
1 9 9 9 5
1 2 3 4 5
```

And the solution is as follows:

x = np.array([[1,2,3,4,5],
        [1, 9, 9, 9, 5],
        [1, 9, 9, 9, 5],
        [1, 9, 9, 9, 5],
        [1, 2, 3, 4, 5]])
x1, x2, x3 = np.split(x, [1, 4]) 
y1, y2, y3 = np.split(x2, [1, 4], axis = 1)
print(y2)

My question is, why is it [1, 4] in the brackets? does this refer to the element number, if so, should it not be [1, 3]?

Sorry if this seems like a very simple question - am still super new to coding!!

Thanks in advance :)

source https://stackoverflow.com/questions/74524188/understanding-numpy-split-function-to-extract-sub-grid

Comments

Prop `className` did not match in next js app

I have written a sample code ( Github Link here ). this is a simple next js app, but giving me error when I refresh the page. This seems to be the common problem and I tried the fix provided in the internet but does not seem to fix my issue. The error is Warning: Prop className did not match. Server: "MuiBox-root MuiBox-root-1" Client: "MuiBox-root MuiBox-root-2". Did changes for _document.js, modified _app.js as mentioned in official website and solutions in stackoverflow. but nothing seems to work. Could someone take a look and help me whats wrong with the code? Via Active questions tagged javascript - Stack Overflow https://ift.tt/2FdjaAW

How to show number of registered users in Laravel based on usertype?

i'm trying to display data from the database in the admin dashboard i used this: <?php use Illuminate\Support\Facades\DB; $users = DB::table('users')->count(); echo $users; ?> and i have successfully get the correct data from the database but what if i want to display a specific data for example in this user table there is "usertype" that specify if the user is normal user or admin i want to user the same code above but to display a specific usertype i tried this: <?php use Illuminate\Support\Facades\DB; $users = DB::table('users')->count()->WHERE usertype =admin; echo $users; ?> but it didn't work, what am i doing wrong? source https://stackoverflow.com/questions/68199726/how-to-show-number-of-registered-users-in-laravel-based-on-usertype

Why is my reports service not connecting?

I am trying to pull some data from a Postgres database using Node.js and node-postures but I can't figure out why my service isn't connecting. my routes/index.js file: const express = require('express'); const router = express.Router(); const ordersCountController = require('../controllers/ordersCountController'); const ordersController = require('../controllers/ordersController'); const weeklyReportsController = require('../controllers/weeklyReportsController'); router.get('/orders_count', ordersCountController); router.get('/orders', ordersController); router.get('/weekly_reports', weeklyReportsController); module.exports = router; My controllers/weeklyReportsController.js file: const weeklyReportsService = require('../services/weeklyReportsService'); const weeklyReportsController = async (req, res) => { try { const data = await weeklyReportsService; res.json({data}) console

StacksPedia

Search This Blog