string MATLAB - 加载文件名存储在字符串中的文件
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MATLAB - load file whose filename is stored in a string
提问by Mark
I am using MATLAB to process data from files. I am writing a program that takes input from the user and then locates the particular files in the directory graphing them. Files are named:
我正在使用 MATLAB 处理来自文件的数据。我正在编写一个程序，该程序接受用户的输入，然后在目录中定位特定文件，以绘制它们。文件命名为：
{name}U{rate}
{name}U{rate}
{name} is a string representing the name of the computer. {rate} is a number. Here is my code:
{name} 是一个表示计算机名称的字符串。{rate} 是一个数字。这是我的代码：
%# get user to input name and rate
NET_NAME = input('Enter the NET_NAME of the files: ', 's');
rate = input('Enter the rate of the files: ');
U = strcat(NET_NAME, 'U', rate)
load U;
Ux = U(:,1);
Uy = U(:,2);
There are currently two problems:
目前有两个问题：
When I do the
strcatwith say 'hello', 'U', and rate is 50, U will store 'helloU2' - how can I getstrcatto append {rate} properly?The load line - how do I dereference U so load tries to load the string stored in U?
当我
strcat说 'hello', 'U' 并且 rate 为 50 时，U 将存储 'helloU2' - 我怎样才能strcat正确附加 {rate}？加载线 - 我如何取消引用 U 以便加载尝试加载存储在 U 中的字符串？
Many thanks!
非常感谢！
采纳答案by Amro
Mikhail's comment above solves your immediate problem.
米哈伊尔上面的评论解决了您的紧迫问题。
A more user-friendly way of selecting a file:
一种更用户友好的选择文件的方式：
[fileName,filePath] = uigetfile('*', 'Select data file', '.');
if filePath==0, error('None selected!'); end
U = load( fullfile(filePath,fileName) );
回答by gnovice
In addition to using SPRINTFlike Mikhail suggested, you can also combine strings and numeric values by first converting the numeric values to strings using functions like NUM2STRand INT2STR:
除了像 Mikhail 建议的那样使用SPRINTF之外，您还可以通过首先使用NUM2STR和INT2STR等函数将数值转换为字符串来组合字符串和数值：
U = [NET_NAME 'U' int2str(rate)];
data = load(U); %# Loads a .mat file with the name in U
One issue with the string in Uis that the file has to be on the MATLAB pathor in the current directory. Otherwise, the variable NET_NAMEhas to contain a full or partial path like this:
字符串 in 的一个问题U是文件必须位于MATLAB 路径或当前目录中。否则，变量NET_NAME必须包含完整或部分路径，如下所示：
NET_NAME = 'C:\My Documents\MATLAB\name'; %# A complete path
NET_NAME = 'data\name'; %# data is a folder in the current directory
Amro's suggestionof using UIGETFILEis ideal because it helps you to ensure you have a complete and correct path to the file.
