Add '_max' to odd variable names and '_min' to even ones.

Question

Usune Elizondo 2021-9-22

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1458344-add-_max-to-odd-variable-names-and-_min-to-even-ones

评论： Usune Elizondo 2021-9-22

采纳的回答： Stephen23

I have a table where just even variables have a name, the rest (odd) have automatic name set by Matlab.

Something like this:

I want to have Var1 = t_max and t = t_min, then Var3 = ang_azi_max and ang_azi = ang_azi_min.

Hope someone can help ;)

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Answer 1

Stephen23 2021-9-22

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https://ww2.mathworks.cn/matlabcentral/answers/1458344-add-_max-to-odd-variable-names-and-_min-to-even-ones#answer_792594

在 MATLAB Online 中打开

T = array2table(rand(5,8),'VariableNames',{'Var1','t','Var3','ang_azi','Var5','vel_azi','Var7','acc_azi'})
T = 5×8 table
     Var1         t         Var3       ang_azi     Var5      vel_azi     Var7      acc_azi
    _______    _______    _________    _______    _______    _______    _______    _______

    0.64569    0.92867    0.0076932    0.65038    0.92731    0.53037    0.45407    0.55135
    0.94421    0.22754      0.50774    0.82564    0.97646    0.69373    0.55652    0.26508
    0.83117    0.69494      0.93597    0.35117    0.89839     0.7037     0.9437    0.52426
     0.8657    0.26734     0.017575    0.80891    0.79093    0.22237    0.93816    0.57082
    0.79332    0.75431      0.40472    0.97708    0.26331    0.52194    0.94611    0.63532
T.Properties.VariableNames(1:2:end) = strcat(T.Properties.VariableNames(2:2:end),'_max');
T.Properties.VariableNames(2:2:end) = strcat(T.Properties.VariableNames(2:2:end),'_min')
T = 5×8 table
     t_max      t_min     ang_azi_max    ang_azi_min    vel_azi_max    vel_azi_min    acc_azi_max    acc_azi_min
    _______    _______    ___________    ___________    ___________    ___________    ___________    ___________

    0.64569    0.92867     0.0076932       0.65038        0.92731        0.53037        0.45407        0.55135  
    0.94421    0.22754       0.50774       0.82564        0.97646        0.69373        0.55652        0.26508  
    0.83117    0.69494       0.93597       0.35117        0.89839         0.7037         0.9437        0.52426  
     0.8657    0.26734      0.017575       0.80891        0.79093        0.22237        0.93816        0.57082  
    0.79332    0.75431       0.40472       0.97708        0.26331        0.52194        0.94611        0.63532  

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Usune Elizondo 2021-9-22

Thank you very much is working perfectly!

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Answer 2

Simon Chan 2021-9-22

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1458344-add-_max-to-odd-variable-names-and-_min-to-even-ones#answer_792579

在 MATLAB Online 中打开

Suppose the table is called T, then try the following:

T.Properties.VariableNames(1:4) = {'t_max','t_min','ang_azi_max','ang_azi_min'}

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Simon Chan 2021-9-22

在 MATLAB Online 中打开

Try this:

temp = T.Properties.VariableNames(2:2:end);
temp_min = cellfun(@(x) strcat(x,'_min'),temp,'UniformOutput',false);
temp_max = cellfun(@(x) strcat(x,'_max'),temp,'UniformOutput',false);
temp_combine = vertcat(temp_max, temp_min);
T.Properties.VariableNames = temp_combine(:);

Stephen23 2021-9-22

@Simon Chan: STRCAT also operates on cell arrays of char vectors, so CELLFUN is entirely superfluous.

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