For loop problem (Help)
显示 更早的评论
Hi guys , anyone can help me to check my coding ...
Current result, something wrong ...
Desire result , How to get table like this? I'm trying to create an auto data collection software by using GUI.
4 个评论
KSSV
2018-2-21
Attach code or copy code here....not image snippets....
Guillaume
2018-2-21
Pictures of code are not particularly useful. We can't copy/paste the code making it much harder to test/debug/modify/give you a corrected version. Plus, your picture is not particularly sharp, and on my screen I can barely read your code.
Copy/paste the code in your question (then use the {}Code button) or attach it as an m file.
Also gives us a better description of the problem.
zhixuan hong
2018-2-21
Guillaume
2018-2-21
Code as found in the m file:
subjects={'No', 'IMC(%)','Status'}
fid=fopen('Version_1','w');
fprintf(fid,'%s %s %s \r\n',subjects{:});
for k = 1:n
if x>= 75
No = num2str(n);
IMC = num2str(areaRatio);
Status = 'Pass';
dlmwrite('Version_1',[No IMC Status],'-append','delimiter','\t','precision','%.2f');
else
No = num2str(n);
IMC = num2str(areaRatio);
Status = 'Fail';
dlmwrite('Version_1',[No IMC Status],'-append','delimiter','\t','precision','%.2f');
end
end
采纳的回答
As far as I can tell the only difference between the two branches of the if is the value of Status, so a better way of writing that if ... else would have been:
if x>= 75
Status = 'Pass';
else
Staus = 'Fail';
end
No = num2str(n);
IMC = num2str(areaRatio);
dlmwrite('Version_1',[No IMC Status],'-append','delimiter','\t','precision','%.2f');
Avoid writing the same thing twice since you double the chance that you make a mistake in one of them.
Also I'm not sure why you're using dlmwrite to write text. As your example show each character ends up separated by a tab. Not very readable.
As for your problem, your loop reduces to:
for k = 1:n
dlmwrite('Version_1', Variables_That_Do_Not_Depend_ON_k, ...)
end
Nothing depends on the iteration variable k in your loop, so, yes you're going to be writing n times the same things. I suspect that No should be
No = num2str(k);
As for x and areaRatio, since they're both scalar I have no idea how they're supposed to change in the loop. Note that x and areaRatio are the same since earlier you have x = areaRatio. Why have two names for the thing? It just adds confusion.
4 个评论
zhixuan hong
2018-2-21
Thanks for your reply . really appreciate but the result like this , IMC and Status keep repeat...
for k = 1:n
if x>= 75
Status = 'Pass';
else
Status = 'Fail';
end
No = num2str(k);
IMC = num2str(x);
dlmwrite('Version_1',[No IMC Status],'-append','delimiter','\t','precision','%.2f');
end
Guillaume
2018-2-21
As I wrote: As for x and areaRatio, since they're both scalar I have no idea how they're supposed to change in the loop
Since they're constant and IMC and Status only depend on them, then yes nothing is going to change.
I have no idea what you intended to do in that loop, but if you want the output to vary, you need to vary x and areaRatio in the loop.
zhixuan hong
2018-2-22
Guillaume
2018-2-22
How to vary areaRatio/x/IMC
I don't know! You tell us. Only you knows what you intended to do with that loop but didn't do.
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