What does ind2sub mean in MATLAB?

The ind2sub command determines the equivalent subscript values corresponding to a single index into an array. [I,J] = ind2sub(siz,IND) returns the matrices I and J containing the equivalent row and column subscripts corresponding to each linear index in the matrix IND for a matrix of size siz .

How do you use indices in MATLAB?

In logical indexing, you use a single, logical array for the matrix subscript. MATLAB extracts the matrix elements corresponding to the nonzero values of the logical array. The output is always in the form of a column vector. For example, A(A > 12) extracts all the elements of A that are greater than 12.

What is linear index MATLAB?

MATLAB interprets a single subscript as an index into a vector containing all the values of A in column order. So A(17) is the same as A(2, 4). A(2, 4) ans = 0

What is sub2ind in MATLAB?

The sub2ind command determines the equivalent single index corresponding to a set of subscript values. IND = sub2ind(siz,I,J) returns the linear index equivalent to the row and column subscripts I and J for a matrix of size siz .

What is MATLAB size?

sz = size( A ) returns a row vector whose elements are the lengths of the corresponding dimensions of A . For example, if A is a 3-by-4 matrix, then size(A) returns the vector [3 4] . szdim = size( A , dim ) returns the length of dimension dim when dim is a positive integer scalar.

What does find function do in MATLAB?

The find() function in MATLAB is used to find the indices and values of non-zero elements or the elements which satisfy a given condition. The relational expression can be used in conjunction with find to find the indices of elements that meet the given condition. It returns a vector that contains the linear indices.

What is a vector in MATLAB?

In MATLAB a vector is a matrix with either one row or one column. The distinction between row vectors and column vectors is essential. Many programming errors are caused by using a row vector where a column vector is required, and vice versa. In these contexts a vector is just a convenient data structure. …

Does MATLAB count from 0 or 1?

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.

What is INF MATLAB?

inf is positive infinity. That is given when calculations overflow the largest representable floating point number (which is about 10^308).

What is Bsxfun MATLAB?

Expansion with Custom Function Use bsxfun to apply the function to vectors a and b . The bsxfun function expands the vectors into matrices of the same size, which is an efficient way to evaluate fun for many combinations of the inputs.

How many GB is MATLAB?

Accepted Answer disk: 2 GB for MATLAB only, 4–6 GB for a typical installation. memory: 2 GB, or 4 GB if you use Simulink.

How to do ind2sub ( i, j ) in MATLAB?

[I,J] = ind2sub (siz,IND) returns the matrices I and J containing the equivalent row and column subscripts corresponding to each linear index in the matrix IND for a matrix of size siz. siz is a 2-element vector, where siz (1) is the number of rows and siz (2) is the number of columns.

When to use ind2sub on a 2D matrix?

For example, if you wanted to apply ind2sub on a 2D matrix, you would specify a 2D numpy array where the first row consists of all of the row locations you want, and the second row consists of all of the column locations you want.

How to convert linear indices to subscripts in MATLAB?

Here sz is a vector with two elements, where sz (1) specifies the number of rows and sz (2) specifies the number of columns. [I1,I2,…,In] = ind2sub (sz,ind) returns n arrays I1,I2,…,In containing the equivalent multidimensional subscripts corresponding to the linear indices ind for a multidimensional array of size sz.

Which is an example of an ind2sub function?

Example 1. The mapping from linear indexes to subscript equivalents for a 3-by-3 matrix is This code determines the row and column subscripts in a 3-by-3 matrix, of elements with linear indices 3, 4, 5, 6. Example 2.