## 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

1. function y = ZCD(I)
2. if(I<1e-8)
3. y=1;
4. else.
5. y=0;
6. 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 .

1. If X is a vector, then find returns a vector with the same orientation as X .
2. 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!

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.