MATLAB: How can i merge multi columns of a matrix in another matrix with single column

MATLABmatrixmergemulti_column

hello to all

I need to matrix ((2)) and i want to use of matrix ((1)). Then i want convert matrix ((2)) values to corresponding decimal values in another matrix. Please help me.

Best Answer

% 1)
str2double(strrep(join(""+yourmatrix),' ','')) 
% OR

% 2)
arrayfun(@(x)polyval(yourmatrix(x,:),10),1:size(yourmatrix,1)).'
% OR
% 3)
reshape(sprintf('%d',yourmatrix),[],size(yourmatrix,2)) % seems to be the fastest after few tests

Related Solutions

MATLAB: How Change Matrix Shape / Setting

This might not be the best way, but it works.

C=[];
c=1;
for k=2:2:size(val,3)
    B(:,:,c)=[val(:,:,k-1),val(:,:,k)];%horizontal cat
    c=c+1;
end
for k=1:size(val,3)/2
    C=[C;B(:,:,k)];%vertical cat
end
C=C';
C=reshape(C,8,[])';%reshape to your desire

MATLAB: Searching for vector values in a matrix

% Creating a sample matrix
yourMatrix=reshape(1:15,5,3)
yourMatrix =
       1     6    11
       2     7    12
       3     8    13
       4     9    14
       5    10    15
% Creating a sample vector with three values.
yourVector=[1,7,14];
% Now getting the row and cols of those values.
[rows, cols]=ind2sub( size(yourMatrix), ...
                      arrayfun(@(v) find(yourMatrix==v), ...
                               yourVector(:)) )
rows =
       1
       2
       4
cols =
       1
       2
       3

The rows and cols of 1,7,14 (the three specific values) are provided. If you are looking only for linear index number then just run:

linIndex=arrayfun(@(v) find(yourMatrix==v), yourVector(:))

Best Answer

Related Solutions

MATLAB: How Change Matrix Shape / Setting

MATLAB: Searching for vector values in a matrix

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