Reading a text file containing colon mark

1 次查看（过去 30 天）

Mohammed Qahosh 2019-5-30

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/464803-reading-a-text-file-containing-colon-mark

评论： Mohammed Qahosh 2019-6-6

I have a text file (a) contains words and numbers and colons. I would like to use the fscan and the fread function to get a time. However, the time is like this 2:30:20

I wonder, how can I do that such that there are cono(:) marks in between.

B=fread(a,time,'uint16');

I think the problem is in the uint16, but I don't know how to solve that.

Thanks in advance for your help

1 个评论
显示 -1更早的评论隐藏 -1更早的评论

Rik 2019-5-30

Have you read the documentation for fread?

请先登录，再进行评论。

请先登录，再回答此问题。

回答（1 个）

Krishna Anne 2019-5-30

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/464803-reading-a-text-file-containing-colon-mark#answer_377245

Looks like you are getting the time as "Duration" class, Try one of these as required to fetch hours or seconds or minutes or milliseconds etc.

milliseconds(time) or

seconds(time) or

hours(time) or

minutes(time)

..........etc, provided time has class 'duration' you may check by typing class(time)

16 个评论
显示 14更早的评论隐藏 14更早的评论

Mohammed Qahosh 2019-6-2

编辑：Rik 2019-6-2

在 MATLAB Online 中打开

In fact I am using a code from a previous master student. This is the code: I have thousands of pictures and I need to find the time of each of them. The time is between the words (Time,Height)

Here is the code, and below is the data in the one of the original pictures.

function [Parameters,Image]=OpenImage(name)
a=fopen(name);
text=fscanf(a,'%c',2048);
if (strcmp(name(end-2:end),'pco')==1)
    height=str2num(text(strfind(text,'Height =')+8:strfind(text,'Width')-1));
    width=str2num(text(strfind(text,'Width =')+7:strfind(text,'Binning')-1));
    exposure=str2num(text(strfind(text,'Exposure Time =')+16:strfind(text,'msec')-1));
    
end
if (strcmp(name(end-3:end),'SBIG')==1)
    height=str2num(text(strfind(text,'Height =')+8:strfind(text,'Width')-1));
    width=str2num(text(strfind(text,'Width =')+7:strfind(text,'Date')-1));
    exposure=str2num(text(strfind(text,'Each_exposure =')+16:strfind(text,'x 10millsec')-1))*10;
end
fseek(a,2048,'bof');
Image=fread(a,[width height],'uint16')';
Parameters=[height,width,exposure];
fclose(a);

Data :

PCO Pixelfly USB ImageFileName: D:\experiment\MoleculeExp\FEM\Video\v190322ae\v190322ae_0.pcoFile_version = 1Date = 22.3.2019Time = 15:26:42Height = 600Width = 800Binning = 1Exposure Time = 1000 msecAverage = 5Temperature = 45Pixel Rate = 12Tip Voltage = 2150Shutter State = 0End

Rik 2019-6-3

编辑：Rik 2019-6-3

Please attach the file itself, not a text copy. Use the paperclip icon to attach it to a comment.

Mohammed Qahosh 2019-6-6

在 MATLAB Online 中打开

Dear Rik, thank you very much for your help, and sorry for my late response I was so busy.

Actually, I added the following code to the original one and it works :

A=regexp(text,'Time');
B=regexp(text,'Height');
L=B-A(1);
if L==16
    
    C=strfind(text,'Time');
    time_hour=str2num(text(C(1)+7:strfind(text,'Height')-8));
     time_min=str2num(text(C(1)+10:strfind(text,'Height')-5));
      time_hour=str2num(text(C(1)+13:strfind(text,'Height')-3));
      time=60*60*time_hour+60*time_min+time_sec;
end
% % I also changed the length L based on the time and it worked 