formula | stock indicators | Business library

I have what I think is a standard formula, which is behaving differently depending on which Excel version I use, Excel 365 or Excel 2019

I have a sample data.table data as below:

I want a circular convolution function where I can set the number N as I like.

All examples I looked at like here and here assume that full padding is required but that not what I want.

I want to have the result for different values of N

• so input would N and and two different arrays of values
• the output should be the N point convolved signal

Here is the formula for circular convolution. Sub N can be seen as the modulo operation.

taken from this basic introduction

This answer is a suitable solution when the array a is piled accordingly to the different cases of N.

When I find time I will post a complete answer, meanwhile feel free to do so.

Thanks to @André pointing this out in the comments!

I don't know if this is possible, but I am trying to take the image of a custom outdoor football field layout and have the players' GPS coordinates correspond to the image xand y position. This way, it can be viewed via the app to show the players' current location on the field as a sort of live tracking.

I have also looked into this Convert GPS coordinates to coordinate plane. The problem is that I don't know if this would work and wanted to confirm beforehand. The image provided in the post was for indoor location, and it was from 11 years ago.

I used Location and Google Maps packages for flutter. The player's latitude and longitude correspond to the actual latitude and longitude that the simulator in the android studio shows when tested.

The layout in question and a close comparison to the result I am looking for.

Any help on this matter would be appreciated highly, and thanks in advance for all the help.

Edit:

After looking more at the matter I tried the answer of this post GPS Conversion - pixel coords to GPS coords, but it wasn't working as intended. I took some points on the image and the correspond coordinates, and followed the same logic that the answer used, but reversed it to give me the actual image X, Ypositions.

The formula that was given in the post above:

Although High Sierra is no longer supported by Homebrew, but I need to install llvm@13 formula as a dependency for other formulas. So I tried to install it this way:

I try to install php@7.3 using brew. But, it return error because it is versioned formula. What is it?

command: brew install php@7.3

result: Error: php@7.3 has been disabled because it is a versioned formula!

(Solution has been found, please avoid reading on.)

I am creating a pixel art editor for Android, and as for all pixel art editors, a paint bucket (fill tool) is a must need.

To do this, I did some research on flood fill algorithms online.

I stumbled across the following video which explained how to implement an iterative flood fill algorithm in your code. The code used in the video was JavaScript, but I was easily able to convert the code from the video to Kotlin:

https://www.youtube.com/watch?v=5Bochyn8MMI&t=72s&ab_channel=crayoncode

Here is an excerpt of the JavaScript code from the video:

Converted code:

I am using lm() on a training set of data that includes a polynomial. When I subset in advance with [ ] I get different coefficients compared to using the subset argument in the lm() function call. Why?

Hello my dear fellows,

I've been trying to recreate the effect: image scales up as the mouse get closer to the center of the image found on https://www.davidwilliambaum.com/

I have been very unsuccessfull so far, as I am not sure how to approach the problem.

I started a codepen with some ideas : https://codepen.io/dindon-studio/pen/RwLwRKM

As you can see I first get the center coordinate of the image, and then i try some dirty formula to scales it up with the mouse distance. But it is very buggy and not convincing at all.

Does anyone got a better approach? Deep thanks for you help!