matlab路徑(string)操作及基本data讀取保存

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% 1 ## build a matrix; Why is matrix ?
    % one student
studentScores = [90 99 98 85];% gammar math english moral
rates         = [0.3 0.3 0.3 0.1];
jiDian        = studentScores * rates';

    % many students
studentScores = [90 99 98 85 % good style; a line with ';' is ok
                 80 70 59 90
                 72 89 65 99];% gammar math english moral
             
rates = [0.3 0.3 0.3 0.1];
jiDians = studentScores * rates';

    % size whos double() uint8() char() 
size(studentScores);
whos('studentScores');

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% 2 ## save : save()
    % save studentScores and jiDians in ScoresOfClass1.mat
save('ScoresOfClass1.mat', 'studentScores', 'jiDians');

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% 3 ## load : load() sprinf() disp() fopen() fprintf()
Scores = load('ScoresOfClass1.mat', 'studentScores');
Sc