Modify a cell array referring to another cell array

Question

luca 2019-9-24

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/481921-modify-a-cell-array-referring-to-another-cell-array

评论： luca 2019-9-24

Given the following code

G= {[1 2 1 2 1 2 3 4 5 4 5 4 6 3 9 3 9; 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85],[1 1 1 1 2 3 4 4 4 5 4 6 3 6 3 9; 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 ]};
SP= [1 2 3 4 5 6 9]; 
t1 = 20; t2 = 20 ; t3 = 20 ; t4 = 20 ; t5 = 20 ; t6 = 20 ; t7 = 20; t8=20 ; t9=20;
for i = 1:size (G,2)
result = cell(size(G));
for gidx = 1:numel(G)
    [uval, loc1, ids]  = unique(G{gidx}(1, :));
    count = accumarray(ids, 1)';
    result{gidx} = arrayfun(@(v, s, n) [repelem(v, n); s, zeros(1, n-1)], uval, G{gidx}(2, loc1), count, 'UniformOutput', false);
end
    AB = G{i}(1,:);
end 

With the value contained in the fist raw of each cell G, I want to modify the arrays contained in cell "result"

I for example we take the first raw of the first cell of G, reported as AB in each cycle:

1 2 1 2 1 2 3 4 5 4 5 4 6 3 9 3 9

at each iteration everytime I meet a specified element, I want to modify its array in result.

In particular, if I consider result{1, 1}{1, 1}" that was

1 1 1

5 0 0

Should now become

1 1 1

5+t1 5+t1+t1 5+t1+t1+t1

so

1 1 1

25 45 65

That is: every time I meet 1 in AB, I want to modify the values inside "result" that refer to that element and add everytime the value t1 to the previous one.

For element 2, at the beginning the result was

2 2 2

10 0 0

Then has to become

2 2 2

10+t2 10+t2+t2 10+t2+t2+t2

...

For element 9, at the beginning the result was

9 9

75 0

Then has to become

9 9

75+t9 75+t9+t9

I hope that it's clear what I would like to obtain

May someone help me with this task?

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Adam Danz 2019-9-24

编辑：Adam Danz 2019-9-24

在 MATLAB Online 中打开

The last example breaks your pattern. I think the last example should be

For element 9, at the beginning the result was
9	9	
75	0	
Then has to become
9	9	      
75+t9	75+t9+t9
% ^^^......^^^

luca 2019-9-24

yes !

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Answer 1

Adam Danz 2019-9-24

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/481921-modify-a-cell-array-referring-to-another-cell-array#answer_393346

编辑：Adam Danz 2019-9-24

在 MATLAB Online 中打开

Replace your t1,t2, t3... with this

tt = [20 20 20 20 20 20 20 20 20]; %Much easier to work with

Then replace the result{} line in the for(gidx...) loop with this

result{gidx} = arrayfun(@(v, s, n, t) [repelem(v, n); s + t.*(1:n)], uval, G{gidx}(2, loc1), count, tt(uval), 'UniformOutput', false);
% Changes > > > > > > > > > > > 1) ^  > > > > > > >  2) ^^^^^^^^^^ > > > > > > > > > > > > > > > 3) ^^^^^^^^