iscolumn - Determine if input is column vector - MATLAB (original) (raw)

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Determine if input is column vector

Syntax

Description

`tf` = iscolumn([V](#mw%5F6e34a7c2-3c68-4ce4-8731-89e6bb0a45f4)) returns logical 1 (true) if V is a column vector. Otherwise, it returns logical 0 (false). A column vector is a two-dimensional array that has a size of N-by-1, where N is a nonnegative integer.

example

Examples

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Create a vector. Determine if it is a column vector.

V = rand(5,1); tf = iscolumn(V)

Find the conjugate transpose of the vector. Determine if it is a column vector.

Vt = V'; tf = iscolumn(Vt)

Create a scalar, which is a 1-by-1 array.

Determine if the scalar V is also a column vector.

Create an array of characters. Determine if it is a column vector.

V = 'Hello, World!'; tf = iscolumn(V)

Check the dimension of V by using size. V is a 1-by-13 character vector, which is not a column vector.

Now create a string scalar by enclosing a piece of text in double quotes.

Check if the scalar V is also a column vector.

Input Arguments

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Input array, specified as a scalar, vector, matrix, or multidimensional array.

Algorithms

• If the input array V has more than two dimensions, theniscolumn(V) returns logical 0 (false). For example, an array of size N-by-1-by-2 is not a column vector.

Extended Capabilities

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Theiscolumn function fully supports tall arrays. For more information, see Tall Arrays.

The iscolumn function fully supports GPU arrays. To run the function on a GPU, specify the input data as a gpuArray (Parallel Computing Toolbox). For more information, see Run MATLAB Functions on a GPU (Parallel Computing Toolbox).

Version History

Introduced in R2010b