信用归@Slayton所有，但实际上您也可以使用

Credits go to @Slayton, but you actually can do the same thing for assigning values too, using deal:

[a([a.b]==1).b]=deal(3)

那么细分:

[a.b]

检索数组a的所有b字段，并将其放入逗号分隔列表.

retrieves all b fields of the array a and puts this comma-separated-list in an array.

a([a.b]==1)

使用逻辑索引仅索引a满足约束的元素.随后，上面的完整命令根据3分配给结果逗号分隔列表的所有元素.html#br2js35-8"rel =" noreferrer>此.

uses logical indexing to index only the elements of a that satisfy the constraint. Subsequently the full command above assigns the value 3 to all elements of the resulting comma-separated-list according to this.