MATLAB: Storing unknown matrices size in a single matrix

MATLABunkown matrices size

Hello everyone,

I have a structure and I use strcmp(data.step(i).comment) to extract the matrices which have the number of student in every class.

example of my issue: I am storing the number of students in every class, Math Class=20 students, Bioology class=18 students and so on. (students number is not constant)

I want to write a code to store all matrices which have the students numbers in a single matrix or vector.

Thanks in advance.

Best Answer

If you already have created variable names like that, then you need to concatenate them like this manually

matrix = [math_class, biology, other variables]

and remember to not do such thing again: https://www.mathworks.com/matlabcentral/answers/304528-tutorial-why-variables-should-not-be-named-dynamically-eval

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MATLAB: Pointer to incomplete class type error in polyspace.

Hello,

I haven't been able to reproduce this error with the last version of Polyspace (R2016b).

Here is the complete code snippet used for the test:

struct student_s {
   unsigned int applicationId;
 };
typedef struct student_s student_t;
typedef student_t *studentid_t;
struct studentinfo_s { studentid_t id; };
typedef struct studentinfo_s studentinfo_t;
studentinfo_t * const student_Info;
studentinfo_t glob;
void f(void) {
  student_Info = &glob;
  student_Info->id->applicationId = 10;
}

I suggest you to try with this new version. If you cannot upgrade, please contact the support and attach the verification log to your request.

Regards,

Alexandre

MATLAB: How to save certain parts of cleaned data from Excel Spreadsheet

save('filename.mat', 'answerKey', 'studentID', 'essay', 'multipleChoice');

Best Answer

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