How to create boxplot for some of data in matlab

Question

I have two Column in excel. I import it to matlab and I create boxplot for them.
I use boxplot function:

boxplot(BasePay,JobTitle)

now I want create boxplot for some value of JobTitle for example JobTitle1 and JobTitle2. These is my data:

Job Title   Base Pay
JobTitle1   486927.08
JobTitle1   461785.8
JobTitle2   523782.43
JobTitle4   388849.77
JobTitle2   380452.08
JobTitle1   450053.76
JobTitle2   546416.52
JobTitle3   384411.2
JobTitle4   353637.71
JobTitle4   311209.74
JobTitle3   355242.48
JobTitle2   359855.85

Answer 1

我不确定你如何保存这些数据，但假设JobTitle的单元格数组和BasePay的向量数据，你可以这样写：

boxplot(BasePay(strcmp(JobTitle,'JobTitle1') | strcmp(JobTitle,'JobTitle2')));

如果你想查看几个箱图，你最好这样做：

grp = strcmp(JobTitle,'JobTitle1') | strcmp(JobTitle,'JobTitle2');
boxplot(BasePay,grp);
bp = gca;
bp.XTickLabel = {'all other','JobTitle1&2'};

或者，如果您只想仅绘制JobTitle1和JobTitle2，则可以单独编写：

boxplot(BasePay(grp),JobTitle(grp)); 

使用上面的grp变量，无需设置标签。