inverse loop

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Arundhatee Talukdar
Arundhatee Talukdar 2011-11-22
编辑： Walter Roberson 2024-9-1
I want to use loop from i=180:1 and again next inserted loop j=180:1 Does matlab allow that? how I access (180,180) first rather then (0,0)...
  1 个评论
Amr
Amr 2016-10-12
sure ... use this command for i=180:-1:1 for j=180:-1:1

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回答（3 个）

Fangjun Jiang
Fangjun Jiang 2011-11-22
for i=180:-1:1
for j=180:-1:1
Jan
Jan 2011-11-22
编辑：Walter Roberson 2024-9-1
Whenever you have a problem with a specific command, be sure to read the help and doc text for this command:
help for
Step S with increments of -0.1
for S = 1.0: -0.1: 0.0, do_some_task(S), end
Thomas
Thomas 2011-11-22
Try,
for i=180:-1:1
for j =180:-1:1
i
j
end
end
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显示 3更早的评论
Walter Roberson
Walter Roberson 2024-9-1
The question @MH asked is about automatically inverting the order of two loops, without having to have a switch() statement. In one case in their example the loops are nested j within i, and in the other case the loops are nested i within j.
The answer to the question is "No, there is no dialog box or editor option to automatically reverse the nesting order. You would need something like
for outer = start:step:fin
for inner = start:step:fin
if ReverseLoop
i = outer; j = inner;
else
i = inner; j = outer;
end
%code
end
end
MH
MH 2024-9-1
Thank you @Walter Roberson

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