Help with Simplifying repetitive code

Question

Ines Shekhovtsov 2023-1-20

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1897730-help-with-simplifying-repetitive-code

回答： Kevin Holly 2023-1-20

I am looking for a way to reduce writing repetative code and perhaps use for loops instead. I've been told that using eval is not the best approach when using a for loop to try and simplify the below code. Does anyone have any other suggestions/code snippets on how i can streamline this:

RD_ROI=RD(timeLimits(1):timeLimits(2));

RIC_ROI=RIC(timeLimits(1):timeLimits(2));

RLT_ROI=RLT(timeLimits(1):timeLimits(2));

ROB_ROI=ROB(timeLimits(1):timeLimits(2));

RPEC_ROI=RPEC(timeLimits(1):timeLimits(2));

RPS_ROI=RPS(timeLimits(1):timeLimits(2));

RRA_ROI=RRA(timeLimits(1):timeLimits(2));

RUT_ROI=RUT(timeLimits(1):timeLimits(2));

Basically i'm creating new variables with _ROI that take existing variable and extract a region of interest.

Thank you in advance for your time!

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Answer 1

Kevin Holly 2023-1-20

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https://ww2.mathworks.cn/matlabcentral/answers/1897730-help-with-simplifying-repetitive-code#answer_1152985

在 MATLAB Online 中打开

If you have your variables as columns in a table, you could do something like this:

t=table;
t.RIC = rand(14,1);
t.RLT = rand(14,1);
t.ROB = rand(14,1);
t.RPEC = rand(14,1);
t.RPS = rand(14,1);
t.RRA = rand(14,1);
t.RUT = rand(14,1);
t
t = 14×7 table
      RIC         RLT         ROB         RPEC        RPS         RRA        RUT  
    ________    ________    ________    ________    ________    _______    _______

    0.080879     0.25474     0.48853    0.095937     0.66441    0.58813    0.18798
     0.22866    0.053753      0.5189    0.047562     0.66939    0.29408     0.3805
      0.2994     0.97273     0.51125     0.80037      0.9816    0.27859    0.68301
     0.64157     0.95801     0.31506      0.0599     0.82694    0.28359    0.10281
     0.25327     0.65621     0.27398     0.77928    0.054263    0.74135    0.17095
     0.99553     0.74094    0.072548     0.50858     0.23869    0.44027     0.6492
     0.92099    0.048788     0.94306      0.1584     0.81534    0.96358    0.39643
     0.16671     0.92683    0.012261     0.72819     0.35723    0.61379    0.47284
     0.68682     0.57082     0.82924     0.33191     0.43374    0.13102    0.16932
     0.94069      0.9905     0.50238     0.25963    0.089702     0.9822      0.483
     0.25529     0.54532      0.2677     0.51884      0.3802    0.18224    0.63096
    0.030474     0.27753     0.93547      0.3527     0.98646     0.3895    0.35703
     0.30422    0.076089     0.97177     0.78907     0.23365    0.86461    0.40572
     0.59585    0.068501     0.40167     0.62403     0.80161    0.81885    0.44789
timeLimits(1) = 3;
timeLimits(2) = 10;
ROI=timeLimits(1):timeLimits(2);
t_ROI = t(ROI,:)
t_ROI = 8×7 table
      RIC        RLT         ROB        RPEC        RPS         RRA        RUT  
    _______    ________    ________    _______    ________    _______    _______

     0.2994     0.97273     0.51125    0.80037      0.9816    0.27859    0.68301
    0.64157     0.95801     0.31506     0.0599     0.82694    0.28359    0.10281
    0.25327     0.65621     0.27398    0.77928    0.054263    0.74135    0.17095
    0.99553     0.74094    0.072548    0.50858     0.23869    0.44027     0.6492
    0.92099    0.048788     0.94306     0.1584     0.81534    0.96358    0.39643
    0.16671     0.92683    0.012261    0.72819     0.35723    0.61379    0.47284
    0.68682     0.57082     0.82924    0.33191     0.43374    0.13102    0.16932
    0.94069      0.9905     0.50238    0.25963    0.089702     0.9822      0.483