start a while loop on working with a file in gui

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Help me please! I need to make a loop that will read information from the file
function pushbutton1_Callback(hObject, eventdata, handles)
[file,path] = uigetfile('*.apa');
[file, ~] = fopen(fullfile(path,file));
fileinfo=dir(path);
filesize=fileinfo.bytes;
i=1
while (~feof(file)) && (ftell(file)<filesize)
a=fread(file,[1,1],'single');
b=fread(file,[1,1],'single');
addz=fread(file,[1,1],'single');
bitadd=fread(file,[1,1],'single');
if (addz==1)&&(bitand(bitadd,16))
ad(i)=a
bd(i)=b
for j=1:length(ad)
intaddora(j)=a(j)+1;
intaddorb(j)=a(j)-1;;
end
i=i+1
end
end
The first part opens the file and I want it to be immediately considered in the loop? , but in static text i = 1, i.e. the cycle does not count, please help me fix it
  5 Comments
Lev Mihailov
Lev Mihailov on 20 Mar 2020
in some files you need to tighten checks (files were not written correctly)
Rik
Rik on 20 Mar 2020
You can enable breakpoints by clicking on the dash next to the line number in the editor.

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