如何使用MATLAB的num2str格式化输出 [英] How to format output using MATLAB's num2str

问题描述

我正在尝试在MATLAB中将数字数组作为字符串输出.我知道使用 num2str 即可轻松完成此操作，但我要在逗号后面加一个空格以分隔数字，而不是制表符.数组元素最多将具有十分之一的分辨率，但其中大多数将是整数.有没有一种格式化输出的方法，可以避免不必要的尾随零?这是我设法整理的:

I'm trying to ouput an array of numbers as a string in MATLAB. I know this is easily done using num2str, but I wanted commas followed by a space to separate the numbers, not tabs. The array elements will at most have resolution to the tenths place, but most of them will be integers. Is there a way to format output so that unnecessary trailing zeros are left off? Here's what I've managed to put together:

data=[2,3,5.5,4];
datastring=num2str(data,'%.1f, ');
datastring=['[',datastring(1:end-1),']']

给出输出:

[2.0, 3.0, 5.5, 4.0]

而不是:

[2, 3, 5.5, 4]

有什么建议吗?

编辑:我刚刚意识到可以使用 strrep 通过调用

I just realized that I can use strrep to fix this by calling

datastring=strrep(datastring,'.0','')

但是，这似乎比我一直在做的还要笨拙.

but that seems even more kludgey than what I've been doing.

推荐答案

代替:

datastring=num2str(data,'%.1f, ');

尝试:

datastring=num2str(data,'%g, ');

输出:[2, 3, 5.5, 4]

或:

Output:[2, 3, 5.5, 4]

Or:

datastring=sprintf('%g,',data);

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