Documentation

This is machine translation

Translated by Microsoft
Mouseover text to see original. Click the button below to return to the English verison of the page.

Note: This page has been translated by MathWorks. Please click here
To view all translated materals including this page, select Japan from the country navigator on the bottom of this page.

sum (DataMatrix)

Return sum of elements in DataMatrix object

Syntax

S = sum(DMObj)
S = sum(DMObj, Dim)
S = sum(DMObj, Dim, IgnoreNaN)

Input Arguments

DMObj

DataMatrix object, such as created by DataMatrix (object constructor).

Dim

Scalar specifying the dimension of DMObj to calculate the sums. Choices are:

  • 1 — Default. Returns sum of elements in each column.

  • 2 — Returns sum of elements in each row.

IgnoreNaN

Specifies if NaNs should be ignored. Choices are true (default) or false.

Output Arguments

S

Either of the following:

  • Row vector containing the sums of the elements in each column in DMObj (when Dim = 1)

  • Column vector containing the sums of the elements in each row in DMObj (when Dim = 2)

Description

S = sum(DMObj) returns the sum of the elements in the columns of a DataMatrix object, treating NaNs as missing values. S is a row vector containing the sums of the elements in each column in DMObj. If the values in DMObj are singles, then S is a single; otherwise, S is a double.

S = sum(DMObj, Dim) returns the sum of the elements in the columns or rows of a DataMatrix object, as specified by Dim. If Dim = 1, returns S, a row vector containing the sums of the elements in each column in DMObj. If Dim = 2, returns S, a column vector containing the sums of the elements in each row in DMObj. Default Dim = 1.

S = sum(DMObj, Dim, IgnoreNaN) specifies if NaNs should be ignored. IgnoreNaN can be true (default) or false.

Introduced in R2008b

Was this topic helpful?