00:14Welcome back, and peace be upon you. Now we'll continue our conversation.
00:19Indexing in Namefile. We want to see how we can implement indexing.
00:22For 3D Ariz. Now in 3D Ariz, as we know, we have
00:26The first one is the first dimension, which is the number of arse segments. Yes, the number of arse segments in
00:34This is the dimension. The second dimension is the number of roses in each of these areas.
00:40The arithm. And the third dimension is a number in these arithms. Okay, let's see.
00:48So how can we do the indexing now? Now I understand what this is.
00:543D ARI consists of two ARIs. Each ARI contains two roses and three columns.
01:00Okay, let's see how we can do it. Let's do indexing. First...
01:04What do I want to get? I want to get the first one, the one in the first one.
01:09Ro from the first area. The first thing I need to do when I want to index is put
01:13The index is followed by the first row. The one I have here has a zero index, just like...
01:17I've put it here. Then I'll put its index, the first row, which is this one.
01:24What? Its index is also zero. And then I put its index as a column.
01:29Which is the one with the three, which is also zero. So that's how I get the index.
01:34Zero zero zero. As Aji, you're doing a tran. Ahi, you see? The first item that came up for me
01:39Three. Okay, let's move on to the second item we want to get. And we want to get
01:44The thread is in the first row. Is it in my first row?
01:50The index is zero, just like I put it here, zero. Then I want to go out.
01:56Which is this. Yes, this is it, and its index is one, as I have put it here.
02:02And then what? I want to find out that Eli is thirty-one. And that will be
02:07The index followed it with 2
02:08Just like I did here, 012
02:10And I got 31
02:12I want to go out now
02:14second element in
02:15first row of
02:17I have a second array.
02:18The index of the second array will be
02:20What will be 1 and what do I have?
02:23The first row will be the index.
02:24I followed him, and I was in his hands.
02:26The second element, which is nine, will be
02:28The index followed it, 1, V
02:301 0 1 then
02:32I want the first element in
02:34second row in second array
02:35The second array will have one index.
02:39And then the second row will also have one index.
02:42The first element will have an index of zero.
02:46Hey, one one zero came up for me, what's up?
02:49good
02:50Now we can also do negative indexing
02:53Hey, I have the same thing.
02:563D dimension array
02:58Now I want to find the first element in the first row from the first array
03:01Let's do the first thing: run
03:03Okay, first of all, what will the index of the first array be?
03:07I have two arrays here, so their index will be minus 2.
03:12And the first row too, because I have two rows.
03:15The index will be
03:16The first row is also minus 2
03:18Hey, here I put minus 2 for the index
03:21minus 2 for what?
03:23For the roo
03:24And then, because I have three columns here
03:26I'm happy to have
03:28Item number 3
03:30What will he have?
03:32The index was minus 3
03:34So that's why I get minus 2
03:35minus 2
03:36minus 3
03:37The item I got is 3
03:40The thread element in the second row of the first array is called "Khalib Hala Al-Thard".
03:44Hello, the first array, as we said, its dimension
03:48It means it will be -2 if we want to be negative, or what? Zero
03:52I'm here now, set to zero, to show you that we can use it.
03:56negative with positive indexing
03:59So here I put the index of the first array
04:18The second element in the first row of the second array
04:21Hello, the second array has an index of one, and I've set it to positive here.
04:24The first row's index has minus 2; I put minus 2 there.
04:30And in my hand is the second element, which is nine, the index of which is seven minus 2
04:35Here I got nine, and the last thing I have is the first element in the second row.
04:40In the second array, the index of the second array is minus 1.
04:44The second row, I set its index to positive here.
04:491 and the first element in the second row, which is 1, I put it as minus 3
04:55I prefer the 1. Okay, now we've used it too.
05:00What is the len function with 2D and 3D arrays to find the len, for example?
05:09A 2D array gives us the len; a 3D array gives us the number of rows.
05:15How many arrays are there if we use it alone?
05:21We can use it with indexing, as I've done here.
05:25I wanted to find the number of rows, so I used `len`, typed `array`, entered my array, and set the index to 0.
05:34What do I get? Let me show you. I got a dragon. What is the number of rows in each?
05:40The array, of course, here too I can put one, meaning I can choose either index zero or index
05:47One of these arrays is the same for columns; I'm talking len array.
05:54First, I put, for example, here I put my index in the second array, which is this one, and then I put the index
06:00I followed the row, which is zero. Of course, I didn't put zero or one, and it will give me the same result.
06:06What I got was the number of items in this row, which are the columns, and I followed it.
06:11But we don't use that kind of talk. What do we use? We use the shape object. As you know, what is a shape?
06:19He gives us
06:19The shape gives us a height, and when we print it, it gives us a tuple. So we can, for example, find the number of arrays in this one.
06:283D array
06:30I took my 3D array, set the shape, and set the index to one, so it gave me the number of arrays (two) and the number of rows (two).
06:37I put a shape index
06:47He gave me three, so I can find out the number of arrays, the number of rows, and the number of columns in the 3D arrays, and the same
06:55I can use 2D arrays
06:58I used the shape to find the number of rows and the number of columns. Okay, we'll stop here now, and hopefully, there will be more.
07:05In the next video, we will continue
07:07Thank you, and I'll see you in the next video.
