creating a function to output the invert the numbers in an array
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A = [ 1 2 3 4 5 6]
A = 6 5 4 3 2 1
when an array is entered, the function will display all elements on a row and all rows in inverted order.
I am having trouble creating a function to do the above for both vectors and matrices. I am to do this without using flip functions.
any help is appreciated ~
Alexandra
1 个评论
Walter Roberson
2012-10-29
Please use better tags for this question; see http://www.mathworks.co.uk/matlabcentral/answers/43073-a-guide-to-tags
回答（3 个）
Image Analyst
2012-10-28
This sounds like a homework problem ( http://www.mathworks.com/matlabcentral/answers/8626-how-do-i-get-help-on-homework-questions-on-matlab-answers). Hint: use a for loop with an increment of -1 to go backwards:
for row = lastRow: -1 : 1
same for the columns. To determine the last row, use the size() function. Use fprintf() or disp() to display. Also, type
doc colon
on the command line to learn how the colon operator works. Post back here with your attempt if you're still having trouble.
Chris A
2012-10-28
A = [ 1 2 3 4 5 6]';
b=reshape(sortrows(horzcat(A, ((numel(A):-1:1)')), [2]),[],1);
b(1:6),
Andrei Bobrov
2012-10-29
编辑：Andrei Bobrov
2012-10-29
ii = numel(A):-1:1;
B = A(ii);
or
B = A(sort(1:numel(A),'descend'));
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