In MATLAB®, there are three primary approaches to accessing array elements based on their location (index) in the array. These approaches are indexing by position, linear indexing, and logical indexing. You can also use mixed indexing by combining both positional and logical indexing. Indexing ...
vectorizing 向量化 scalar operations 标量运算 array operations 数组运算 logical vectors 逻辑向量 logical indexing 逻辑索引 对于任何基于乘法的运算(即:乘法、除法和乘方),必须在用于数组运算的运算符前面放置一个点。 运算符$.*$ 必须用于数组乘法,运算符$./$ .\ 用于数组除法。 逻辑向量 % 逻辑索引 在逻辑...
否则，代码将使用numeric arrays、logical indexing和我最喜欢的bsxfun，这在market of runtimes中一定很便...
Find the modulus,mod(A,2), and convert it to a logical array for indexing. L = logical(mod(A,2)) L =3x3 logical array1 1 0 1 0 1 0 1 1 The array has logical1(true) values whereAis odd. UseLas a logical index to pick out the odd elements ofA. ...
If I want to change all NaNs in an array A to zero, the following works: 테마복사 A(isnan(A))=1000 As far as I see the isnan(A) returns nothing but an array of 1's and 0's. But if I do the following: B = [ 1 5 8]; B([0 0 1]) = 1000; to replace the...
logical indexing, which can be useful when working with conditional statements. For example, say you want to know the values of "A" that is larger than 7. Use the > operator to return a logical array whose elements are logical 1 when an element in "A" is ...
数组索引(Array Indexing): 删除矩阵A中的第2行:A(2,:)=[] 删除矩阵A中的第2列:A(:,2)=[] 冒号运算符(Colon operator): A = 1:100 直接生成1~100的数组 B = 1:2:99 直接以2为等差,生成数组 str='a':2:'z' 字符也可以使用冒号运算符 ...
矩阵维度信息(参考Matlab R2014a帮助文档“Array Dimensions”): 矩阵元素索引(indexing,参考Matlab R2014a帮助文档“Indexing”、《MATLAB R2011a教程》第3章p125): 全下标访问:A(a,b),a、b可以是标量、向量,“:”索引该维度所有值,“a:end”从a到该维度最大值; ...
逻辑类型(logical):包含布尔型变量true和false,分别表示逻辑值1和逻辑值0。 元胞数组类型(cell):我们这一小节要介绍的数据类型。 结构体数组类型(struct):带有可以包含各种类型和大小的数据的命名字段的数组,后续章节会介绍。 分类数组类型(categorical):用于保存分类型变量的数据,例如性别、等级等,后续章节会介绍。
I have a function,, that outputs a vector of numerical values, I also have two matrices,, the former matrix is an array of zeros, for pre-allocation, whose width is of equal length to the vector output of my function, the latter is an array of equal...