- Indexing is used for accessing the elements of an array.
- Numpy array indexing is similar to simple array indexing.
- You have to specify the index number of an array element to retrieve it.
- Let us understand this with some examples.
For accessing the first element of a NumPy array we have to use 0(zero) because indexes start with 0 in the NumPy array.
Here we are accessing the 5th element of the array.
- Slicing is very similar to indexing.
- It is useful when you have to extract a sequence of elements.
- Here are a few examples for you to understand it better.
Extracting 2nd & 3rd element from the array. (Note that the left boundary is inclusive while the right boundary is exclusive)
If you don’t specify the left boundary it will take default value 0 for it.
If you don’t specify the right boundary it will take the length of the array for it. (Returns entire array starting from the left boundary)
- Don’t know how to create a NumPy array? Click here