>> table(TestY{idx},label{idx},Posterior{idx,:},'VariableNames',['TrueLabel','PredLabel','Posterior']) Subscripting into a table using one subscript (as in t(i)) or three or more subscripts (as in t(i,j,k)) is
可以创建与x大小相同的矩阵,如rand(size(x)) Indexing(索引) 用来提取和修改数组中的值 行/列向量:一个索引值x(idx) x(3) x(2:4) 矩阵:x(row,col) x(1,3) x(1,:) //整个第一行 x(:,3) //整个第三列 注:1.可以用end代表最后一行或最后一列,如y=A(end,2),(end-1)等表达式也都合法 ...
链式索引(chained indexing)是一种高级的数据访问技术,它允许我们在单个表达式中执行多个索引操作。如果元胞数组中包含数组数据,我们就能使用链式索引来访问该数组中的特定元素:先使用大括号来引用元胞中的数组;再使用小括号引用数组中的元素。 显然,链式索引的代码形式非常简洁。如果按照传统的方式,我们需要生成一个中间...
Specifying Table Indices Use any of the following indexing schemes to specify the intended variable or variables. Indexing SchemeExamples Variable names: A string, character vector, or cell array. A pattern object. "A" or 'A'— A variable named A ["A","B"] or {'A','B'}— Two variab...
链式索引(chained indexing)是一种高级的数据访问技术,它允许我们在单个表达式中执行多个索引操作。如果元胞数组中包含数组数据,我们就能使用链式索引来访问该数组中的特定元素:先使用大括号来引用元胞中的数组;再使用小括号引用数组中的元素。 显然,链式索引的代码形式非常简洁。如果按照传统的方式,我们需要生成一个中间...
You can use dot indexing to access table variables. For example, calculate the mean height of the patients using the values inT.Height. meanHeight = mean(T.Height) meanHeight = 67 Calculate body mass index (BMI), and add it as a new table variable. You also can add and name table va...
可以使用logical indexing来过滤表格中的数据,例如: T(T.Var1 > 3, :) 9. 合并表格 可以使用join函数来合并两个表格,例如: T1 = table([1, 2, 3]', 'VariableNames', {'Var1'}); T2 = table([4, 5, 6]', 'VariableNames', {'Var2'}); T = join(T1, T2) 10. 统计表格 可以使用summary...
首先来看Matlab的符号表(参考Matlab R2014a帮助文档“Symbol Reference”): 下图清晰的说明了Matlab的基本数据类型(类)(取自Matlab R2014a帮助文档“Fundamental MATLAB Classes”),其中double是默认数据类型,字符串用单引号‘’: Matlab是高级动态语言,变量(对象)在使用之前不需要声明,标识符的第一次出现视为变...
This example shows how to add, delete, and rearrange column-oriented variables in a table. You can add, move, and delete table variables using the addvars, movevars, and removevars functions. As alternatives, you also can modify table variables using dot syntax or by indexing into the ...
scatter(x,y,"LineWidth",2) creates a scatter plot with 2-point marker outlines. scatter(tbl,"MyX","MyY","ColorVariable","MyColors") creates a scatter plot from data in a table, and customizes the marker colors using data from the table. For a full list of properties, see Scatter Pr...