Y2B | Transfer the video on Youtube to Bilibili , support CC

NOTE: I couldn't think any better Title name, you're most welcome to edit or suggestion.

Direct Colab Link. Just grab the given dummy data set and load it to colab.

I'm trying to train an object detection model for a multi-class problem. In my training, I am using the Mosaic augmentation, Paper, for this task.

In my training mechanism, I'm a bit stuck to properly retrieve the class labels of each category, as the augmentation mechanism randomly picks the sub-portion of a sample. However, below is a result of a mosaic augmentation that we've achieved with a relevant bounding box until now.

I've created a dummy data set. Link here. The df.head():

It has 4 class in total and df.object.value_counts():

I am creating a classic shooter style game from scratch using C and SDL. I seem to run into an issue I can't figure out.

When I try to rotate the world geometry around the player it seems that it is not rotating correctly.

In theory the distance between the player and the vertex should remain constant after I perform the rotation, but it seems it doesn't in my code.

I've included relevant parts of my code below and a gif of what is happening.

I'd like to understand whats going on here and some guidance on how I can fix it.

I have data that I read in as a list:

I am trying to graph 34 individual plots against time with two Y variables. My dataset is structured: X Y1A Y2A Y1B Y2B . . . Y1n Y2n

I can get plot individually by simply asking ggplot to plot the columns I want. However, I have 34 plots to do in each of 5 datasets, so automating this would be useful. I am really stuck as to how to structure the language to do what I want it to do. (New user). I am not good at for loops or even know if this is exactly the right structure of code I want to use. I have looked at apply functions and those don't seem to do what I want, since I am not trying to manipulate my data, but just graph all of it at once.

I have not tried melt but I am again stuck at how to create two lines at a time. Should I name my columns something different/easier to automate.

I have searched for hours and haven't found anything that quite answered my question.

I don't understand how figures created with matplotlib are shown, when they are updated, when they are blocking, etc.

To help my understanding and to help me make matplotlib do what I need specifically, could anyone help me create a matplotlib.figure wrapper/almost-clone, let's call it MyFigure, that behaves exactly as described in the code (and its comments) below?

I have dozens files (a, b, c, ...) each one with following format:

File a ------File b ------ File c ------- and so on
x1a y1a | x1b y1b | x1c y1c | ...
x2a y2a | x2b y2b | x2c y2c | ...
x3a y3a | x3b y3b | x3c y3c | ...
.
.
.

By keeping in mind that there are hundreds of rows with two columns in each file. I want just to sum the second columns of each file row by row, i.e.,

Y1 = y1a + y1b + y1c + ...
Y2 = y2a + y2b + y2c + ...
Y3 = y3a + y3b + y3c + ...
.
.
.

Then, creating a new two column file with content of:

x1a Y1
x2a Y2
x3a Y3
.
.
.

Could some one help with that?
Thank you!

I added the attribute idf to GeoFence class initiation function, so that fence objects have identifiers. The same has been done for Worker class.

Then I wrote this code piece:

I'm writing some code to draw 2 8 pixel long lines on a LCD end to end. I would like to do this using a for loop, however I am stuck working out how to connect the start of the second to the end of the first. The following code produces the pattern I am after, however is very repetitive when doing many lines:

i've a problem with drawing firework effect in animated scene when i clicked on mouse button. Why it don't drawing?

My Code: