MyTimes | News Reader App using NewsApi.org | REST library

I am transitioning from using a heatmap created using the lattice "levelplot" to one using ggplot2, but I'm running into an issue in how the two packages deal with uneven x-axis variables.

Here is my data with an uneven time series:

I am creating a simple polling website using HTML & JavaScript (through Glitch) and also Firebase, I followed a tutorial to do it. I have it all working and the voting works fine and displays the results as intended. I now want to take the results and use them to display a chart on my HTML page. I understand how this works, just not how to get the voting results variable into the JS code for the chart. I am using charts.js and the code for this is towards the bottom. The y values should be a variable reading the total votes, but it isn't working. Any suggestions?

Thanks

For an app I'm building in Flutter I'm trying to retrieve a list of reserved timeslots by the logged in user across different days from Firestore. I get to a point where I can retrieve the reserved timeslots on a given day (by hardcoding the day and passing it on to a futurebuilder), but when I try to retrieve data from a collectionGroup the listview stays empty (snapshot doesn't have data). Now, as a Flutter beginner I find understanding how to handle collectionGroup queries quite difficult and therefore any help would be appreciated!

For a quick overview of how my database is structured I have included 2 pictures on github:

Picture 1: https://github.com/winckles/rooster/blob/master/Schermafbeelding%202019-11-10%20om%2020.08.20.png?raw=true

Picture 2: https://github.com/winckles/rooster/blob/master/Schermafbeelding%202019-11-10%20om%2020.08.43.png?raw=true

Below I have included my futurebuilder and listview builder

I have an Object MyTimes and in that object there are fields name ,start_date and configuration.

I have an array of this object, MyTimes [] mytimes

I am trying to sort the array by the start time but am struggling how to go about it.

The start_time field is a string, so this needs converting to a datetime.

I have 1 time unit of signal history. My dominant frequency is 1/100 time units. When I use numpy's fft function, I am limited in resolution by the extent of the signal history. How can I increase the resolution of my frequency comb without corrupting my signal?

I have an error in NEWS_API_KEY when I edited it return back in this class

I have several time vectors with different sizes and one time vector with secondly sampled.

I was trying to find the closest point to the element $i^{th}$ but this method is insanely slow.

I have an activity with a listview that contains couple of EditText and image view. When User is sign up his data (name,phone,profile image etc...) stored in firebase. I want the imageview which located in listview row to show the profile image of each user. I have the image download Uri and I use picaso to set the profile image to the image view.

The problem is: the profile image shown only in the last row of the listview..

This is how I set the profile image to the ImageView:

I have a series of dates (they are class Dates) that represent dates someone did something: