help with concatenation to open file

Question

lucas 2013-10-23

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/91210-help-with-concatenation-to-open-file

评论： Vivek Selvam 2013-11-5

hello, can anyone help me to make this concatenation work?

I need a routine that ask the user to type the word 'work' and number '2' and also, only permits receive the answer 'work' and '2'

i tought something like this

% enter the right name of the file

a = {'Type the name of the file:'}; % u need to type work

work = inputdlg (a);

t=str2num(char(work));

_if t =~ work

..._

% enter the right number of the file

b = {'Type the number of the file:'}; % you need to type 2

number = inputdlg (b);

n=str2num(char(number(1)));

if n~=2

disp('ERROR: Please type 2');

else

% concatenate

name = [ t, '_' , n ];

name_file = [ name, '.txt' ];

load (name_file);

thx :)

1 个评论
显示 -1更早的评论隐藏 -1更早的评论

dpb 2013-10-23

在 MATLAB Online 中打开

Well, if you're only going to allow one answer, why make the user work (so to speak)? Just define it.

But, the general question -- to compare a string

doc strncmp % and friends

To compare numeric, just use '==' or for arrays see

doc isequal

As a stylistic note, dereference the cell array contents with the curly braces "{}" instead of using char()

n=str2num(num{1});

This kind of logic is also a good location for a while...end loop enclosing a try...catch block to handle error and repeat the question until proper answer is obtained (or user gives up in frustration--don't forget to have a way to exit)

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Vivek Selvam 2013-10-23

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/91210-help-with-concatenation-to-open-file#answer_100609

编辑：Vivek Selvam 2013-10-23

在 MATLAB Online 中打开

Try doc function for the new functions you find in the following code.

This is one way to do what you want:

a           = 'Type the name of the file:';     % u need to type work
b           = 'Type the number of the file:';   % you need to type 2
t           = '';                               % initialize file name
n           = NaN;                              % initialize file number
tRequired   = 'work';
nRequired   = 2;
% enter the right name of the file
while strcmp (t,tRequired) == 0   % loop till the file name is not same
      t       = input (a,'s');    % get input as string
end
% enter the right number of the file
while n ~= nRequired              % loop till the number of file is not same
      n       = input (b,'s');    % get input as string
      n       = str2double(n);
end
name        = [ t, '_' , num2str(n) ];
name_file   = [ name, '.txt' ];
disp(name_file);
load (name_file);