Using string variable names for dot indexing

varnames = {'rsrp_nr' 'sinr_nr' 'bler_dl_nr' 'bler_ul_nr' 'mcs_dl_nr' 'mcs_ul_nr' 'layers_dl_nr' 'layers_ul_nr' 'tp_pdsch_dl_nr' 'tp_pusch_ul_nr'}; 
Test = array2table(randn(5,numel(varnames)), 'VariableNames',varnames)
Test = 5×10 table
    rsrp_nr      sinr_nr     bler_dl_nr    bler_ul_nr    mcs_dl_nr    mcs_ul_nr    layers_dl_nr    layers_ul_nr    tp_pdsch_dl_nr    tp_pusch_ul_nr
    ________    _________    __________    __________    _________    _________    ____________    ____________    ______________    ______________

     0.53165      -1.4146      0.15515         1.656      -1.7371       1.3253         1.6272        -0.44658          0.97248           0.87074   
    0.041848       2.0438      0.15903      -0.51318      -1.0633       1.0485        -1.7061        -0.52948          -1.2473          -0.39379   
     0.51137     -0.50428      0.22443       0.79484      0.76808      0.65757       -0.16261        -0.86027         -0.86237           -2.0298   
     -1.0916    -0.024071      0.85436       0.40742       0.4719     -0.53527        0.64941         0.10239          0.76209          -0.10233   
      1.0462      -1.4834     -0.36448      -0.24396     -0.16983      0.93012       -0.30279         0.40905           1.4175           0.62576   
rr = 2;
vn = varnames(rr)
vn = 1×1 cell array
    {'sinr_nr'}
GetColumn = Test.(varnames{rr})
GetColumn = 5×1
   -1.4146
    2.0438
   -0.5043
   -0.0241
   -1.4834

That also works if the variable name is not a normal MATLAB variable name (for example containing a space or other special characters).

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Answer 2

Rik 2024-3-7

1
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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/2091701-using-string-variable-names-for-dot-indexing#answer_1422481

在 MATLAB Online 中打开

You're missing parentheses:

varnames = {'rsrp_nr' 'sinr_nr'};
T=table(pi,2*pi,VariableName={'rsrp_nr' 'sinr_nr'})
T = 1×2 table
    rsrp_nr    sinr_nr
    _______    _______

    3.1416     6.2832 
T.(varnames{2})
ans = 6.2832