Subscript indices must either be real positive integers or logicals

Question

elena rondina 2016-1-26

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/265288-subscript-indices-must-either-be-real-positive-integers-or-logicals

编辑： Image Analyst 2016-1-26

hello recently I'm learning matlab. i have this problem:

j  = read(img);
u=im2bw(img);
imshow(u);

and main:

if[imgName,path] = uigetfile('*.jpg','Select the MATLAB code file');
img=imread([path imgName]);
j  =read(img );

matlab error:Subscript indices must either be real positive integers or logicals. how can I read an image by main function that using other read function?

4 个评论
显示 2更早的评论隐藏 2更早的评论

elena rondina 2016-1-26

编辑：elena rondina 2016-1-26

在 MATLAB Online 中打开

ok error message is:

if Subscript indices must either be real positive integers or logicals.
Error in re (line 4)
j  =main(k );

read is A function that you've written.what is this error?what's the solution?

Star Strider 2016-1-26

What is ‘main’?

What is the value of ‘k’?

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Image Analyst 2016-1-26

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/265288-subscript-indices-must-either-be-real-positive-integers-or-logicals#answer_207502

编辑：Image Analyst 2016-1-26

在 MATLAB Online 中打开

Why do you have "if" in this line:

if[imgName,path] = uigetfile('*.jpg','Select the MATLAB code file');

Try getting rid of that if, and just start with the brackets. Or better yet, try more robust code like this:

% Have user browse for a file, from a specified "starting folder."
% For convenience in browsing, set a starting folder from which to browse.
startingFolder = 'C:\Program Files\MATLAB'; % Wherever you want....
if ~exist(startingFolder, 'dir')
  % If that folder doesn't exist, just start in the current folder.
  startingFolder = pwd;
end
% Get the name of the file that the user wants to use.
defaultFileName = fullfile(startingFolder, '*.jpg');
[baseFileName, folder] = uigetfile(defaultFileName, 'Select a file');
if baseFileName == 0
  % User clicked the Cancel button.
  return;
end
fullFileName = fullfile(folder, baseFileName)