Need clarity of this command
显示 更早的评论
I am having these commands
a = [697 770 852 941];
b = [1209 1336 1477];
%them later in code
f = [];
for c=1:4,
for r=1:3,
f = [ f [a(c);b(r)] ]; % WHAT IS function of this command
end
end
Plz explain this command
f = [ f [a(c);b(r)] ];
and what does this do
f = []; %does it make empty matrix
采纳的回答
Fangjun Jiang
2011-10-8
You are right.
f=[]; % make f an empty matrix
a=1;b=2;
f=[a;b] % doing vertical concatenation
f=[a b] % doing horizontal concatenation
doing f=[f [a(c);b(r)] ] in a loop is expanding f. It's not a good programming technique though.
更多回答（1 个）
moonman
2011-10-8
0 个投票
1 个评论
Fangjun Jiang
2011-10-8
Start f as [], just run the following one at a time to test it out.
f=[f [1;2]]
f=[f [3;4]]
f=[f [400;500]]
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