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NumPy in a Nutshell

book Access 2-D and 3-D Arrays

Let's have a look at an example of a 2-D array with axis numbering:

Let's have a look at an example of indexing (both positive and negative) in 2-D arrays:

Let's examine the syntax of slicing: array[start_row: end_row: step_row, start_column: end_column: step_column], where:

  • start_row is the index from which row slicing begins;
  • end_row is the index where row slicing stops (note that this index is not included);
  • step_row is the parameter that specifies the intervals between row indices;
  • start_column is the index from which column slicing starts;
  • end_column is the index where column slicing ends (note that this index is not included);
  • step_column is the parameter that determines the intervals between column indices.

Now, let's refer to the following image:

Let's have a look at an example of a 3-D array with axis numbering:

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Consider the following array: [[6, 5, 7, 8], [65, 2, 7, 9]].

  1. Retrieve the fourth element from the first part of the array [6, 5, 7, 8], and the first element from the second part of the array [65, 2, 7, 9].
  2. Multiply the obtained elements together.
  3. Display the product of the obtained elements.

Lösning

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book Access 2-D and 3-D Arrays

Let's have a look at an example of a 2-D array with axis numbering:

Let's have a look at an example of indexing (both positive and negative) in 2-D arrays:

Let's examine the syntax of slicing: array[start_row: end_row: step_row, start_column: end_column: step_column], where:

  • start_row is the index from which row slicing begins;
  • end_row is the index where row slicing stops (note that this index is not included);
  • step_row is the parameter that specifies the intervals between row indices;
  • start_column is the index from which column slicing starts;
  • end_column is the index where column slicing ends (note that this index is not included);
  • step_column is the parameter that determines the intervals between column indices.

Now, let's refer to the following image:

Let's have a look at an example of a 3-D array with axis numbering:

Uppgift

Swipe to start coding

Consider the following array: [[6, 5, 7, 8], [65, 2, 7, 9]].

  1. Retrieve the fourth element from the first part of the array [6, 5, 7, 8], and the first element from the second part of the array [65, 2, 7, 9].
  2. Multiply the obtained elements together.
  3. Display the product of the obtained elements.

Lösning

Switch to desktopByt till skrivbordet för praktisk övningFortsätt där du är med ett av alternativen nedan
Var allt tydligt?

Hur kan vi förbättra det?

Tack för dina kommentarer!

Avsnitt 3. Kapitel 3
single

single

close

Awesome!

Completion rate improved to 4.76

book Access 2-D and 3-D Arrays

Svep för att visa menyn

Let's have a look at an example of a 2-D array with axis numbering:

Let's have a look at an example of indexing (both positive and negative) in 2-D arrays:

Let's examine the syntax of slicing: array[start_row: end_row: step_row, start_column: end_column: step_column], where:

  • start_row is the index from which row slicing begins;
  • end_row is the index where row slicing stops (note that this index is not included);
  • step_row is the parameter that specifies the intervals between row indices;
  • start_column is the index from which column slicing starts;
  • end_column is the index where column slicing ends (note that this index is not included);
  • step_column is the parameter that determines the intervals between column indices.

Now, let's refer to the following image:

Let's have a look at an example of a 3-D array with axis numbering:

Uppgift

Swipe to start coding

Consider the following array: [[6, 5, 7, 8], [65, 2, 7, 9]].

  1. Retrieve the fourth element from the first part of the array [6, 5, 7, 8], and the first element from the second part of the array [65, 2, 7, 9].
  2. Multiply the obtained elements together.
  3. Display the product of the obtained elements.

Lösning

Switch to desktopByt till skrivbordet för praktisk övningFortsätt där du är med ett av alternativen nedan
Var allt tydligt?

Hur kan vi förbättra det?

Tack för dina kommentarer!

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