Creating a string with Permutation

Hi,

I have a short question, I am creating a string with a loop but I cannot do the permutation/combination correctly

here is my code

Axes_name = {'sint0.2';'sint0.5';'sint0.7'};
fold_2 = {'BCA';'BPCA';'DLA';'DLCA'};
C_ext = nan*zeros(length(Axes_name),length(fold_2));
for i=1:length(Axes_name)
    for j=1:length(fold_2)
        
        leg{sub2ind(size(C_ext),i,j)} = [Axes_name{i} ' ' fold_2{j}];
    end
end

I am trying to make combinations like this:

sint0.2 BCA

sint0.2 BPCA

sint0.2 DLA

sint0.2 DLCA

sint0.5 BCA

sint0.5 BCPA

sint0.5 DLA

sint0.5 DLCA

...

and so on, but i am not getting it correctly.Does any know what changes i should do

Answer 1

[Adam Danz]

I believe this is what you're working toward.

Axes_name = {'sint0.2';'sint0.5';'sint0.7'};
fold_2 = {'BCA';'BPCA';'DLA';'DLCA'};
str = compose('%s %s', string(Axes_name), string(fold_2)')

str = 3×4 cell array
    {'sint0.2 BCA'}    {'sint0.2 BPCA'}    {'sint0.2 DLA'}    {'sint0.2 DLCA'}
    {'sint0.5 BCA'}    {'sint0.5 BPCA'}    {'sint0.5 DLA'}    {'sint0.5 DLCA'}
    {'sint0.7 BCA'}    {'sint0.7 BPCA'}    {'sint0.7 DLA'}    {'sint0.7 DLCA'}

If you want a column vector,

str(:)

ans = 12×1 cell array
    {'sint0.2 BCA' }
    {'sint0.5 BCA' }
    {'sint0.7 BCA' }
    {'sint0.2 BPCA'}
    {'sint0.5 BPCA'}
    {'sint0.7 BPCA'}
    {'sint0.2 DLA' }
    {'sint0.5 DLA' }
    {'sint0.7 DLA' }
    {'sint0.2 DLCA'}
    {'sint0.5 DLCA'}
    {'sint0.7 DLCA'}

Answer 2

[Paul]

Hi hazmah,

Is this what you're looking for?

Axes_name = string({'sint0.2';'sint0.5';'sint0.7'})

Axes_name = 3×1 string array
    "sint0.2"
    "sint0.5"
    "sint0.7"

fold_2 = string({'BCA';'BPCA';'DLA';'DLCA'})

fold_2 = 4×1 string array
    "BCA"
    "BPCA"
    "DLA"
    "DLCA"

result = reshape(Axes_name.' + " " + fold_2,[],1)

result = 12×1 string array
    "sint0.2 BCA"
    "sint0.2 BPCA"
    "sint0.2 DLA"
    "sint0.2 DLCA"
    "sint0.5 BCA"
    "sint0.5 BPCA"
    "sint0.5 DLA"
    "sint0.5 DLCA"
    "sint0.7 BCA"
    "sint0.7 BPCA"
    "sint0.7 DLA"
    "sint0.7 DLCA"

Answer 3

[Voss]

Axes_name = {'sint0.2';'sint0.5';'sint0.7'};
fold_2 = {'BCA';'BPCA';'DLA';'DLCA'};

You can change the size of C_ext to be length(fold_2)-by-length(Axes_name), since you want to cycle through the fold_2 values first in leg. (Swap j and i where they're used in sub2ind as well.)

C_ext = nan*zeros(length(fold_2),length(Axes_name));
for i=1:length(Axes_name)
    for j=1:length(fold_2)
        leg{sub2ind(size(C_ext),j,i)} = [Axes_name{i} ' ' fold_2{j}];
    end
end
leg = leg.'

leg = 12×1 cell array
    {'sint0.2 BCA' }
    {'sint0.2 BPCA'}
    {'sint0.2 DLA' }
    {'sint0.2 DLCA'}
    {'sint0.5 BCA' }
    {'sint0.5 BPCA'}
    {'sint0.5 DLA' }
    {'sint0.5 DLCA'}
    {'sint0.7 BCA' }
    {'sint0.7 BPCA'}
    {'sint0.7 DLA' }
    {'sint0.7 DLCA'}

However, you can create matrices of indices i and j using meshgrid or ndgrid, and construct leg at once using strcat:

[i,j] = meshgrid(1:numel(Axes_name),1:numel(fold_2));
leg = reshape(strcat(Axes_name(i),{' '},fold_2(j)),[],1)

leg = 12×1 cell array
    {'sint0.2 BCA' }
    {'sint0.2 BPCA'}
    {'sint0.2 DLA' }
    {'sint0.2 DLCA'}
    {'sint0.5 BCA' }
    {'sint0.5 BPCA'}
    {'sint0.5 DLA' }
    {'sint0.5 DLCA'}
    {'sint0.7 BCA' }
    {'sint0.7 BPCA'}
    {'sint0.7 DLA' }
    {'sint0.7 DLCA'}