访问1x1 matlab单元的内容 [英] Accessing the contents of a 1x1 matlab cell

问题描述

我不确定这个术语，但是我已经将数据从文本文件读取到1x1单元格数组P中.检查P时，它在(1,1)位置列出了"<142x2单元格>".从那里，我可以双击它，它会打开到我真正想要的142x2单元格中.问题是，我不知道如何通过代码将数据从1x1单元阵列转换为142x2单元阵列. 另外，我在任何地方都找不到大括号表示的内容.

I'm not sure about the terminology, but I have read data from a text file into a 1x1 cell array P. When examining P, it lists "<142x2 cell>" in the (1,1) position. From there I can double-click this and it opens up into the 142x2 cell that I actually want. The issue is, I don't get how to manipulate this data via code to convert from the 1x1 cell array to the 142x2 cell array. Also, I cannot find anywhere what the curly brackets denote.

推荐答案

我不知道如何通过代码将数据从1x1单元格数组转换为142x2单元格.

单元格数组P实际上是一个1x1的单元格数组，它依次包含另一个单元格数组142x2.使用textscan时，这种类型的输出非常常见.要访问内部单元格数组，只需使用花括号({})，如下所示:

The cell array P is actually a 1x1 cell array, which in turn contains another cell array 142x2. This type of output is very common when using textscan. To access the inner cell array, you can simply use curly braces ({}), like so:

Q = P{1}; // or P{:} if you're certain that P holds only one cell

生成的Q应该包含您的142x2单元阵列.我通常通过执行P = P{:}来拉平" P，而无需使用中间变量.

The resulting Q should hold your 142x2 cell array. I usually "flatten" P by doing P = P{:}, without using an intermediate variable.

此外，我在任何地方都找不到大括号表示的内容.

您是否已阅读 MATLAB有关特殊字符的文档?它是这样的:

Have you read MATLAB's documentation about special characters? Here's what it says:

在单元格数组分配语句中使用大括号.例如，A(2,1) = {[1 2 3; 4 5 6]}或A{2,2} = ('str').有关{ }的更多信息，请参见help paren.

Curly braces are used in cell array assignment statements. For example, A(2,1) = {[1 2 3; 4 5 6]}, or A{2,2} = ('str'). See help paren for more information about { }.

我也敦促您阅读以下(非常)相关的问题:使用{}和()访问单元格元素之间的区别(大括号与括号)

I would also urge you to read the following (very) related question: Difference between accessing cell elements using {} and () (curly braces vs. parentheses)

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