## Can an index number be 0 in MATLAB?

Accepted Answer MATLAB does not allow an index of zero into an array unless you are performing logical indexing using a vector including a logical 0 and want to ignore the corresponding element of the array into which you are indexing.

**How do you find zero crossings in MATLAB?**

Correct way to detect Zero crossing

- function y = ZCD(I)
- if(I<1e-8)
- y=1;
- else.
- y=0;
- end.

### How do you find the index value in MATLAB?

k = find( X ) returns a vector containing the linear indices of each nonzero element in array X .

- If X is a vector, then find returns a vector with the same orientation as X .
- If X is a multidimensional array, then find returns a column vector of the linear indices of the result.

**Do arrays start at 0 or 1 MATLAB?**

However MATLAB has indexing of arrays beginning from 1 instead of 0, which is the norm in almost every programming languages I have encountered so far.

## Does Python index from 0 or 1?

python lists are 0-indexed. So the first element is 0, second is 1, so on. So if the there are n elements in a list, the last element is n-1. Remember this!

**What is zero-crossing in Simulink?**

Simulink® uses a technique known as zero-crossing detection to accurately locate a discontinuity without resorting to excessively small time steps. Usually this technique improves simulation run time, but it can cause some simulations to halt before the intended completion time.

### What is a zero-crossing detector?

A zero-crossing detector or ZCD is one type of voltage comparator, used to detect a sine waveform transition from positive and negative, that coincides when the i/p crosses the zero voltage condition. The applications of the Zero Crossing Detector are phase meter and time marker generator.

**What does it mean if a matrix is 0?**

1. A zero matrix is just a matrix with any dimensions that has all elements inside the matrix as 0. It does NOT have to be a square matrix.

## Does MATLAB count from 0 or 1?

**Is not empty MATLAB?**

In MATLAB®, an empty array has at least one dimension length equal to zero. An array containing missing values, such as NaN or , is not necessarily empty. Create a categorical vector with missing values. Create a 0-by-0 categorical array and test if it is empty.

### How to find all zero elements in MATLAB?

Please help me I want to find all zero elements in matrix in MATLAB. For example, if matrix the answer should be (1,3) and (3,2). But the real matrix I want to solve is very big. Is there any way to do this.

**How to find the indices of an array in MATLAB?**

To find array elements that meet a condition, use find in conjunction with a relational expression. For example, find (X<5) returns the linear indices to the elements in X that are less than 5. To directly find the elements in X that satisfy the condition X<5, use X (X<5).

## How to find indices and values of nonzero elements?

Indices to nonzero elements, returned as a vector. If X is a row vector, then k is also a row vector. Otherwise, k is a column vector. k is an empty row vector or empty column vector when X is an empty array or has no nonzero elements. find uses the convention that k is an empty matrix [] when X is an empty matrix [].

**How to find the nonzero elements in a matrix?**

[row,col,v] = find ( ___) also returns vector v , which contains the nonzero elements of X. Find the nonzero elements in a 3-by-3 matrix. Use the logical not operator on X to locate the zeros. Find the first five elements that are less than 10 in a 4-by-4 magic square matrix.