exporting array data to text file

Question

Afrasiab Himaloy 2018-7-23

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/411760-exporting-array-data-to-text-file

回答： Giridharan Kumaravelu 2018-7-23

I have the following code which provides array of some random numbers:

if true
clc;
clear all;
close all;
files=dir('doc2.txt');
names=files.name;
fId=fopen(files.name,'r');
col=textscan(fId, '%f %f'); 
data=[col{:}];
time=data(:,1)';
freq=9*sqrt(data(:,2));
y=length(freq);
high(y)=freq(y);
for (i=1:(y-1))
  high(i)=[freq(i)+freq(i+1)]/2;
end
low(1)=freq(1);
for (i=2:y)
  low(i)=high(i-1);
end
n=20;
x=zeros(n,y);
for i=1:y
  all=low(i):25000:high(i);
  l=length(all);
  if l<n
      disp('Not possible to fit in 20 numbers!');
      continue;
  else
  index=randperm(l,n);
  end
  x(:,i)=sort(all(index), 'ascend');
end
end

there is a variable 'all' which saves random number for the last loop. this code gives the output following: x =

0e+06 *
0000    6.0750    7.7500    8.7500         0         0
0500    6.1500    7.7750    8.7750         0         0
0750    6.1750    7.8250    8.8000         0         0
1250    6.2000    7.9500    8.8250         0         0
1750    6.3000    7.9750    8.8500         0         0
2750    6.3500    8.0250    8.8750         0         0
3000    6.4750    8.0750    8.9000         0         0
3250    6.5750    8.1500    8.9250         0         0
3500    6.7250    8.1750    8.9500         0         0
4000    6.7500    8.2500    8.9750         0         0
4250    6.8250    8.2750    9.0000         0         0
4750    7.0000    8.3250    9.0250         0         0
5000    7.0500    8.3500    9.0500         0         0
5250    7.2500    8.3750    9.0750         0         0
5500    7.3000    8.4500    9.1000         0         0
5750    7.3750    8.5250    9.1250         0         0
6000    7.4500    8.5750    9.1500         0         0
6250    7.5250    8.6250    9.1750         0         0
8000    7.5500    8.6500    9.2000         0         0
9000    7.5750    8.7000    9.2250         0         0
and the variable 'all' has following values: 
ans =
0e+06 *
6500
6750
7000
7250
7500
7750
which is only for the range between 9.65M & 9.8M. but i want the output to be like the attached file. ultimately, the code will write a output file like 'final.txt'. (just assume 1.6*E6 is multiplied in the output values, no need to think about that)

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Answer 1

Giridharan Kumaravelu 2018-7-23

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/411760-exporting-array-data-to-text-file#answer_330005

在 MATLAB Online 中打开

xTable = array2table(x);
writetable(xTable,'final.txt','Delimiter',' ');

The above code can help and you can modify the first row in the text editor. (You cannot have the column names as in the final.txt provided by you, as they are not valid variable names)