Hello,
I have a 3×3 matrix and I want to make it 4×4 matrix by inserting a row and column of zero elements. How can I do that?
Thanks,
Rakesh
MATLAB: Insert rows and columns in a matrix
insert rows and columns in a matrixMATLABmatrix manipulation
Related Solutions
Assuming this:
b=[2,3,4;7 1 6];is a typo and supposed to read:
b=[2,3,4,7,1,6];Then you can make the new rows as a matrix of zeros, set appropriate elements = 1, then concatenate:
A = rand(9, 10)b=[2,3,4,7,1,6];%make the new rows as a single block
newRows = zeros(length(b), size(A, 2));bIx = sub2ind(size(newRows), 1:length(b), b);newRows(bIx) = 1;%concatenate them
A = [A; newRows]Example output:
A = 0.5470 0.0811 0.8176 0.5502 0.2259 0.9797 0.2217 0.0292 0.5211 0.8852 0.2963 0.9294 0.7948 0.6225 0.1707 0.4389 0.1174 0.9289 0.2316 0.9133 0.7447 0.7757 0.6443 0.5870 0.2277 0.1111 0.2967 0.7303 0.4889 0.7962 0.1890 0.4868 0.3786 0.2077 0.4357 0.2581 0.3188 0.4886 0.6241 0.0987 0.6868 0.4359 0.8116 0.3012 0.3111 0.4087 0.4242 0.5785 0.6791 0.2619 0.1835 0.4468 0.5328 0.4709 0.9234 0.5949 0.5079 0.2373 0.3955 0.3354 0.3685 0.3063 0.3507 0.2305 0.4302 0.2622 0.0855 0.4588 0.3674 0.6797 0.6256 0.5085 0.9390 0.8443 0.1848 0.6028 0.2625 0.9631 0.9880 0.1366 0.7802 0.5108 0.8759 0.1948 0.9049 0.7112 0.8010 0.5468 0.0377 0.7212A = 0.5470 0.0811 0.8176 0.5502 0.2259 0.9797 0.2217 0.0292 0.5211 0.8852 0.2963 0.9294 0.7948 0.6225 0.1707 0.4389 0.1174 0.9289 0.2316 0.9133 0.7447 0.7757 0.6443 0.5870 0.2277 0.1111 0.2967 0.7303 0.4889 0.7962 0.1890 0.4868 0.3786 0.2077 0.4357 0.2581 0.3188 0.4886 0.6241 0.0987 0.6868 0.4359 0.8116 0.3012 0.3111 0.4087 0.4242 0.5785 0.6791 0.2619 0.1835 0.4468 0.5328 0.4709 0.9234 0.5949 0.5079 0.2373 0.3955 0.3354 0.3685 0.3063 0.3507 0.2305 0.4302 0.2622 0.0855 0.4588 0.3674 0.6797 0.6256 0.5085 0.9390 0.8443 0.1848 0.6028 0.2625 0.9631 0.9880 0.1366 0.7802 0.5108 0.8759 0.1948 0.9049 0.7112 0.8010 0.5468 0.0377 0.7212 0 1.0000 0 0 0 0 0 0 0 0 0 0 1.0000 0 0 0 0 0 0 0 0 0 0 1.0000 0 0 0 0 0 0 0 0 0 0 0 0 1.0000 0 0 0 1.0000 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1.0000 0 0 0 0Are you using matrices or tables? It's not completely clear to me in your post. If it's a matrix you can do the calculation and concatenation in one step.
>> datosraw = [datosraw datosraw(:,1) * pi]This takes the original value of datosraw and concatenates it with the first column of datosraw * pi, placing that column at the end.
If you're using tables you can just assign the new table variable as the result of a calculation.
>> T T = promedio voltaje corriente ________ _______ _________ 0.119 0.81428 0.075854 0.49836 0.24352 0.05395 0.95974 0.92926 0.5308 0.34039 0.34998 0.77917 0.58527 0.1966 0.93401 0.22381 0.25108 0.12991 0.75127 0.61604 0.56882 0.2551 0.47329 0.46939 0.50596 0.35166 0.011902 0.69908 0.83083 0.33712 0.8909 0.58526 0.16218 0.95929 0.54972 0.79428 0.54722 0.91719 0.31122 0.13862 0.28584 0.52853 0.14929 0.7572 0.16565 0.25751 0.75373 0.60198 0.84072 0.38045 0.26297 0.25428 0.56782 0.65408 >> T.result = T.promedio * pi T = promedio voltaje corriente result ________ _______ _________ _______ 0.119 0.81428 0.075854 0.37384 0.49836 0.24352 0.05395 1.5657 0.95974 0.92926 0.5308 3.0151 0.34039 0.34998 0.77917 1.0694 0.58527 0.1966 0.93401 1.8387 0.22381 0.25108 0.12991 0.70313 0.75127 0.61604 0.56882 2.3602 0.2551 0.47329 0.46939 0.8014 0.50596 0.35166 0.011902 1.5895 0.69908 0.83083 0.33712 2.1962 0.8909 0.58526 0.16218 2.7989 0.95929 0.54972 0.79428 3.0137 0.54722 0.91719 0.31122 1.7191 0.13862 0.28584 0.52853 0.4355 0.14929 0.7572 0.16565 0.46902 0.25751 0.75373 0.60198 0.80899 0.84072 0.38045 0.26297 2.6412 0.25428 0.56782 0.65408 0.79885 >>
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