How to create a GUI in matlab?

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Harry Smith
Harry Smith 2022-9-13
评论： Harry Smith 2022-9-15
Hello everybody,
i am not very experienced in matlab.
I have to create a GUI that a gui that should make me enter:
input: a file (of any extension) and the numerical values of some variables (ex: x coordinates, y coordinates, size_map)
output: an .hdr file that contains these numeric values associated with the input file
i'm using gdal in matlab
How can I do?
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Image Analyst
Image Analyst 2022-9-13
Sounds like you totally overlooked or ignored my answer below. Why?

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回答（1 个）

Image Analyst
Image Analyst 2022-9-13
You forgot to attach your input file, probably because you never read the community guidelines or this link:
TUTORIAL: How to ask a question (on Answers) and get a fast answer
So if the file is a binary image, you can do
mask = imread(filename);
[rows, columns] = find(mask);
x_min = min(columns);
x_max = max(columns);
y_min = min(rows);
y_max = max(rows);
To get the pixel size you're going to have to get that somehow, like from spatial calibration or the header of the image. Otherwise, any spatial analysis will just give you results in pixels, which really doesn't have a size, or maybe you just want to consider it as 1. But if you want real world units, you have to calibrate like shown in my attached demo.
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Image Analyst
Image Analyst 2022-9-15
It should be. Write a small demo that proves this to me. Here are the steps you should do:
% Read your existing table.
t = readtable(filename)
% Now alter one field to have a different value.
t.Whatever(1) = someNewValue;
% Now call write table and save to a different text file.
filename2 = 'answers.txt'
writetable(t, filename2)
Then attach the code and both text files with the paperclip icon.
Harry Smith
Harry Smith 2022-9-15
In this case it works, but I would like to be able to change the values at the graphical interface, not at the code level.
I attach the input file and my code:
file='fileinput.txt';
table_filetxt=readtable(fileinput);
fig = uifigure;
uit = uitable(fig,'Data',table_filetxt);
uit = uitable(fig);
uit.Data = table_filetxt;
uit.ColumnSortable = true;
uit.ColumnEditable = [false true true true];
fileinput2='fileinput2.txt'
writetable(table_filetxt,'fileinput2.txt');
A window opens with my table, I can modify the values, but not save it.
Instead, if you opened the table via workspace and changed the values, in that case it would save them.

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