setVariable

Set variable in data source workspace

Since R2022b

Syntax

setVariable(dsWks,varName,varValue)

Description

setVariable(dsWks,varName,varValue) assigns varValue to the variable varName in the data source workspace represented by the Simulink.data.DataSourceWorkspace object dsWks.

Examples

Modify Variable in Data Source Workspace

Define a getData method for an XML file adapter to read the data from an XML file and then use the setVariable function to populate the data into the data source workspace that Simulink^® passes to the method.

This getData method reads an XML file in the following format.

<customerData>
<x>10</x>
<y>15</y>
</customerData>

function diagnostic = getData(adapterObj,sourceWorkspace,previousChecksum,diagnostic)​
    % Each time getData is called on the same source, sourceWorkspace is the same as
    % the last time it was called. Clear it to make sure no old variables exist.
    clearAllVariables(sourceWorkspace);
    dom = xmlread(adapterObj.source);
    tree = dom.getFirstChild;
    if tree.hasChildNodes
        item = tree.getFirstChild;
        while ~isempty(item)
            name = item.getNodeName.toCharArray';
            if isvarname(name)
                value = item.getTextContent;
                setVariable(sourceWorkspace,name,str2num(value));
            end
            item = item.getNextSibling;
        end
    end
end

Input Arguments

dsWks — Data source workspace

Simulink.data.DataSourceWorkspace object

Data source workspace, specified as a Simulink.data.DataSourceWorkspace object.

varName — Variable name

string | character array

Variable name specified as a string or character array.

Example: "x"

Data Types: char | string

varValue — Variable value

scalar

Variable value, specified as a scalar.

Example: 2

Version History

Introduced in R2022b