Storing multiple matrices created by multiple executions of a function
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I have a recursing function that outputs four matrices when the recursion stops. The problem is that (because it's a recursing function) the function runs multiple times simultaniously so I at the end I get a set of four matrices from each finishing function but I don't know from which function it's originating. So my command window shows:
A1 = .. A2=... A3=.. A4=.. A1=.. A2=.. A3=.. ...etc. Where A1, A2, A3 & A4 are the four matrices named by the function. Is there a way to index or store them so that I can acces each matrix individually (my goal is to put them all into one big matrix)?
Thanks for reading!
采纳的回答
Method one: input/output arguments:
function [A,B] = mainfun(N)
[A,B] = recfun(N,{},{});
end
function [A,B] = recfun(N,A,B) % local function
if N>0
A{end+1} = 1:+1:N; % output data
B{end+1} = N:-1:1; % output data
[A,B] = recfun(N-1,A,B); % recursion
end
end
And tested:
>> [X,Y] = mainfun(4);
>> X{:}
ans =
1 2 3 4
ans =
1 2 3
ans =
1 2
ans =
1
>> Y{:}
ans =
4 3 2 1
ans =
3 2 1
ans =
2 1
ans =
1
Method two: nested function:
function [A,B] = mainfun(N)
A = {};
B = {};
recfun(N);
function recfun(N) % nested function
if N>0
A{end+1} = 1:+1:N; % output data
B{end+1} = N:-1:1; % output data
recfun(N-1); % recursion
end
end
end
And tested:
>> [X,Y] = mainfun(4);
>> X{:}
ans =
1 2 3 4
ans =
1 2 3
ans =
1 2
ans =
1
>> Y{:}
ans =
4 3 2 1
ans =
3 2 1
ans =
2 1
ans =
1
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