如何输出矩阵尺寸及其内容? [英] How to output matrix dimensions together with its content?

问题描述

是否可以使GNU Octave输出矩阵尺寸及其内容?例如，它应该产生污秽.像这样:

Is it possible to make GNU Octave to output matrix dimensions together with its content? For example, it should produce smth. like this:

octave:1> X = [1 2; 3 4]

X [2x2] =

   1   2
   3   4


octave:2> X(1,:)

ans [1x2] =

   1   2

推荐答案

在MATLAB中，使用以下内容在路径中某处名为@double的文件夹中创建display.m:

In MATLAB, create display.m in a folder called @double somewhere in your path with this content:

function display(v)
name = inputname(1);
if isempty(name)
    name = 'ans';
end
s = num2cell(size(v));
fprintf('\n%s [%d%s] =\n\n', name, s{1}, sprintf('x%d', s{2:end}));
builtin('disp', v);
end

这样，您将覆盖类double的display方法，并完全获得您所描述的内容.但是，这对于其他类(例如int8，logical或cell)不起作用.您必须对所有感兴趣的类都重写该方法.示例:

This way you override the display method for class double, and get exactly what you have described. However, this will not work for other classes like int8, logical or cell. You have to override the method for all classes you are interested in. Example:

>> A=ones(2,2,2)

A [2x2x2] =

(:,:,1) =
     1     1
     1     1
(:,:,2) =
     1     1
     1     1

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