统计

Figures are always more powerful

>> x = 1:14;
>> freqy = [1 0 1 0 4 0 1 0 3 1 0 0 1 1];
>> subplot(1,3,1);
>> bar(x, freqy);
>> xlim([0 15]);
>> subplot(1,3,2);
>> area(x, freqy);
>> xlim([0 15]);
>> subplot(1,3,3);
>> stem(x, freqy);
>> xlim([0 15]);
>>

Boxplot

>> marks = [80 81 81 84 88 92 92 94 96 97];
>> boxplot(marks)
>> prctile(marks,[25 50 75])  % 百分比处的值

ans =

    81    90    94

>>

Skewness

Kurtosis