How to Extract Vector from Matrix and Get them in Print
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I have written code as below. a is input matrix. b (i) the vectors to be extracted.
clear all, clc;
a=[1 2; 3 4; 5 6; 7 8]
for i=1:4
b=a(i,:)
end
I want to extract vectors as b1, b2, b3, b4. Also get the output in print as vectors extracted are b1, b2, b3, b4 (new line) from the matrix a. How can I code it appropriately?
When I try the command b(i)=a(i:1), I get error 'assignment dimension mismatch' When I try with extra command c(i)=b(i) with or without for loop, error displayed is 'index exceeds matrix dimensions'
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Accepted Answer
KSSV
on 12 Jun 2017
a=[1 2; 3 4; 5 6; 7 8] ;
% write matrix line by line
fid = fopen('text.txt','w') ;
for i=1:4
b=a(i,:) ;
fprintf(fid,[repmat(' %f ', 1, length(b)) '\n'],b') ;
end
fclose(fid) ;
% Write whole matrix at once
dlmwrite('text.txt',a) ;
2 Comments
Image Analyst
on 12 Jun 2017
Since you did not say anything about needing a disk file, get rid of line 3 and 8-10, and change line 6 to
fprintf([repmat(' %f ', 1, length(b)) '\n'], b');
(essentially getting rid of fid).
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