start a while loop on working with a file in gui

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Lev Mihailov 2020-3-20

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https://ww2.mathworks.cn/matlabcentral/answers/511890-start-a-while-loop-on-working-with-a-file-in-gui

评论： Rik 2020-3-20

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