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Find indices for queried state vectors

Since R2023a



    stateIDS = state2index(graph,states) finds the state indices stateIDS for the queried state vectors states, if they exist in the navGraph object graph.


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    Load navGraph data for states and links.

    load navGraphData.mat

    Create a table to use to search for the state ID.

    stateData = table([3 6 0.142170047601527; 1 1 1],["F"; "A"],[2; 2], ...

    Find the indices of the states.

    id = findstate(navGraphObj,stateData)
    id = 2×1

    The navGraph states table contains a state corresponding to the first state data, so the function returns its index. However, the states table does not contain a state that corresponds to the second state, so the function returns 0.

    ans=8×3 table
              StateVector          Name     Lanes
        _______________________    _____    _____
        8          2    0.72176    {'A'}      2  
        1          1    0.29188    {'B'}      2  
        7          7    0.91777    {'C'}      2  
        8         10    0.71458    {'D'}      2  
        5          1    0.54254    {'E'}      2  
        3          6    0.14217    {'F'}      2  
        2          9    0.37334    {'G'}      3  
        8          7    0.67413    {'H'}      2  
    stateIDS = state2index(navGraphObj,stateData.StateVector)
    stateIDS = 2×1

    Input Arguments

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    Graph object, specified as a navGraph object.

    State vectors, specified as a matrix in which each row represents a state vector. The state vectors must be of the same size as those in the StateVector column of the States table in the navGraph object graph.

    Data Types: single | double

    Output Arguments

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    State indices, returned as a column vector of positive integers. When the function does not find a specified state vector, the value for the corresponding element in stateIDS is 0.

    Data Types: double

    Extended Capabilities

    C/C++ Code Generation
    Generate C and C++ code using MATLAB® Coder™.

    Version History

    Introduced in R2023a

    See Also