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Reading and ploting a notepad txt file on Matlab

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Mini Me
Mini Me 2012-11-25
编辑： Walter Roberson 2017-3-14
I am trying to get the my data read through Matlab and then plot it. but with my code using fscanf and/or textscan the file is being read as one array and taking the data one by one as a character which makes it impossible to plot. It's like each char/integer is an array.here's how my data looks like:
Time Volt Chan 1 chan 2 chan 3 chan 4 chan 5 chan 6 chan7
3333.222 222.33 0.2334 0.3444 0.2233 0.4455 -0.733 0.3333 0.123
3333.222 0.2323 0.4566 0.3456 0.2453 0.4563 -0.753 0.2356 0.233
I want to plot the time data Versus the volts and the other channels separately. Can Anyone help? I know the data looks wrong on here but There's two set of data for each channels.
  2 个评论
Walter Roberson
Walter Roberson 2012-11-25
What arguments did you you use for textscan() when you tried?
Mini Me
Mini Me 2012-11-26
编辑：Walter Roberson 2017-3-14
i use that general form:
filename=input('input filename','%s')
fid=fopen(filename,'r')
array=fscanf(fid,%e%c, [,inf]
plot(array([1],:),array([3],:))
fclose(fid)
and then plot. but I can never get it to read the file right and keep in mind that these are not the acual arguments inside the functions.

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回答（4 个）

moulay
moulay 2012-11-25
save the data as .txt data. with the load function load filname.txt. befor you do this, you shold comment the title line (the first line. (strg+r)).
now you do this:
% load filename.txt
time=filename(:,1);
volt=filename(:,2);
chanel1=filename(:,3);
and so on.....
plot(time,volt)
Mini Me
Mini Me 2012-11-26
That did not work at all because the file is tab delimited. and I want to plot the time column to the volt column and so on..
Mini Me
Mini Me 2012-11-26
And how do you comment the first line, because before i took the first line out by using fget(fid) is there another way with your code
  1 个评论
moulay
moulay 2012-11-26
do you have just one file to open?
Comment a line: put at the begining of the line %

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Mini Me
Mini Me 2012-11-27
Never mind I fixed it. Thanks for the help but I went with a different approach

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