how to extract data from struct?

Question

Muhammad 2021-9-2

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1445504-how-to-extract-data-from-struct

回答： Walter Roberson 2021-9-2

采纳的回答： Walter Roberson

在 MATLAB Online 中打开

i have a struct name 'dataset'

i want to extract data from struct in the form of matrix

load dataset.mat
y=dataset.Mert.AOG.bir.TO.jointAngle;

L5S1 has the following data

 struct with fields:
           L5S1_x: [1×359 double]
           L5S1_y: [1×359 double]
           L5S1_z: [1×359 double]
           L3L4_x: [1×359 double]
           L3L4_y: [1×359 double]
           L3L4_z: [1×359 double]
          T12L1_x: [1×359 double]
          T12L1_y: [1×359 double]
          T12L1_z: [1×359 double]
           T8T9_x: [1×359 double]
           T8T9_y: [1×359 double]
           T8T9_z: [1×359 double]
           C7T1_x: [1×359 double]
           C7T1_y: [1×359 double]
           C7T1_z: [1×359 double]
         C1Head_x: [1×359 double]
         C1Head_y: [1×359 double]
         C1Head_z: [1×359 double]
    RT4Shoulder_x: [1×359 double]
    RT4Shoulder_y: [1×359 double]
    RT4Shoulder_z: [1×359 double]
      RShoulder_x: [1×359 double]
      RShoulder_y: [1×359 double]
      RShoulder_z: [1×359 double]
         RElbow_x: [1×359 double]
         RElbow_y: [1×359 double]
         RElbow_z: [1×359 double]
         RWrist_x: [1×359 double]
         RWrist_y: [1×359 double]
         RWrist_z: [1×359 double]
    LT4Shoulder_x: [1×359 double]
    LT4Shoulder_y: [1×359 double]
    LT4Shoulder_z: [1×359 double]
      LShoulder_x: [1×359 double]
      LShoulder_y: [1×359 double]
      LShoulder_z: [1×359 double]
         LElbow_x: [1×359 double]
         LElbow_y: [1×359 double]
         LElbow_z: [1×359 double]
         LWrist_x: [1×359 double]
         LWrist_y: [1×359 double]
         LWrist_z: [1×359 double]
           RHip_x: [1×359 double]
           RHip_y: [1×359 double]
           RHip_z: [1×359 double]
          RKnee_x: [1×359 double]
          RKnee_y: [1×359 double]
          RKnee_z: [1×359 double]
         RAnkle_x: [1×359 double]
         RAnkle_y: [1×359 double]
         RAnkle_z: [1×359 double]
      RBallFoot_x: [1×359 double]
      RBallFoot_y: [1×359 double]
      RBallFoot_z: [1×359 double]
           LHip_x: [1×359 double]
           LHip_y: [1×359 double]
           LHip_z: [1×359 double]
          LKnee_x: [1×359 double]
          LKnee_y: [1×359 double]
          LKnee_z: [1×359 double]
         LAnkle_x: [1×359 double]
         LAnkle_y: [1×359 double]
         LAnkle_z: [1×359 double]
      LBallFoot_x: [1×359 double]
      LBallFoot_y: [1×359 double]
      LBallFoot_z: [1×359 double]

I want to extract each array seperatly .can i use for loop here ,if yes then how ?

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Stephen23 2021-9-2

编辑：Stephen23 2021-9-2

The data is already easily accessible via the structure: why can't you just use the structure?

Before you decide to force yourself into writing the slow, complex, very inefficient, time-wasting, difficult-to-debug, obfuscated code required to magically create variables like that, you might like to read this:

https://www.mathworks.com/matlabcentral/answers/304528-tutorial-why-variables-should-not-be-named-dynamically-eval

and also possibly this:

https://www.mathworks.com/matlabcentral/fileexchange/26216-structure-fields-to-variables

The best solution by far is to refer to the data in the structure, and not inefficiently create lots of variables.

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