# How do you unpad an array in Matlab?

## How do you unpad an array in Matlab?

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- A = magic(4)
- n = 2.
- B = padarray(A,[n n]) % pad.
- A2 = B(n+1:end-n,n+1:end-n) % unpad.

**How do I remove leading zeros in Matlab?**

Write a function called unpad, which takes a row vector, removes all zeros at the beginning of the vector, and returns the remaining elements of the vector (i.e., it drops the zeros at the beginning of the vector). Assume that at least one element in the array w is non-zero.

### How do you create an integer array in Matlab?

To create an array with four elements in a single row, separate the elements with either a comma ( , ) or a space.

- a = [1 2 3 4] a = 1×4 1 2 3 4.
- a = [1 3 5; 2 4 6; 7 8 10] a = 3×3 1 3 5 2 4 6 7 8 10.
- z = zeros(5,1) z = 5×1 0 0 0 0 0.
- sin(a)
- a’
- p = a*inv(a)
- format long p = a*inv(a)
- p = a.*a.

**How do you find the number of elements in an array in Matlab?**

n = numel( A ) returns the number of elements, n , in array A , equivalent to prod(size(A)) .

## How do you flip in Matlab?

B = flip( A , dim ) reverses the order of the elements in A along dimension dim . For example, if A is a matrix, then flip(A,1) reverses the elements in each column, and flip(A,2) reverses the elements in each row.

**How do I remove part of a string in Matlab?**

newStr = erase( str , match ) deletes all occurrences of match in str . The erase function returns the remaining text as newStr . If match is an array, then erase deletes every occurrence of every element of match in str . The str and match arguments do not need to be the same size.

### How do you strip in Matlab?

Description. newStr = strip( str ) removes all consecutive whitespace characters from the beginning and end of str , and returns the result as newStr . newStr = strip( str , side ) removes all consecutive whitespace characters from the side specified by side . The side argument can be ‘left’ , ‘right’ , or ‘both’ .

**How do you create an empty array in MATLAB?**

empty to create a 0-by-0 array of the ClassName class. Use ClassName . empty(m,0) to create an m-by-0 array of the ClassName class. This function is useful for creating empty arrays of data types that do not have a special syntax for creating empty arrays, such as [] for double arrays.

## How do you find the number of elements in an array?

A number of elements present in the array can be found by calculating the length of the array….ALGORITHM:

- STEP 1: START.
- STEP 2: INITIALIZE arr[] = {1, 2, 3, 4, 5}
- STEP 3: length= sizeof(arr)/sizeof(arr[0])
- STEP 4: PRINT “Number of elements present in given array:” by assigning length.
- STEP 5: RETURN 0.
- STEP 6: END.

**How do you find the length of an array in Matlab?**

L = length( X ) returns the length of the largest array dimension in X . For vectors, the length is simply the number of elements. For arrays with more dimensions, the length is max(size(X)) . The length of an empty array is zero.

### How to pad a 2-D array in MATLAB?

Pad Each Dimension of a 2-D Array. Add three elements of padding to the end of the first dimension of the array and two elements of padding to the end of the second dimension. Use the value of the last array element on each dimension as the padding value. A = [ 1 2; 3 4 ]

**Which is the symmetric pad in MATLAB padarray?**

‘symmetric’ — Pad with mirror reflections of the array along the border. Valid category in the image, specified as a string scalar or character vector. missing, which corresponds to the category. This is the default pad value for categorical images.

## What is the default pad value in MATLAB?

Pad value, specified as one of the following. Numeric scalar — Pad array with elements of constant value. The default pad value of numeric and logical images is 0. ‘circular’ — Pad with circular repetition of elements within the dimension. ‘replicate’ — Pad by repeating border elements of array.

**When to add padding to a pad array?**

The padarray function pads numeric or logical images with the value 0 and categorical images with the category . By default, paddarray adds padding before the first element and after the last element of each dimension.