MATLAB: Convert Two Arrays into One Matrix Containing Incremented Between Values

arraysconvertmatrix

Let's say I have:

i and I, such that I=i-10

i =

   100
   432
   660

I =

    90
   422
   650

And want Matlab to produce the following matrix:

90 91 92 93 94 95 96 97 98 99 100

422 423 424 425 426 427 428 429 430 431 432

650 651 652 653 654 655 656 657 658 659 660

How would I go about doing that? It seems like it should be pretty simple…

Best Answer

bsxfun(@plus, I, 0:i(1)-I(1))

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MATLAB: How to convert a char into double

Note that there are not only numbers in that string, it also contains 'S' characters apparently at random, e,g.:

>> f(8480:8500)
ans =
3 -118 S 623 1623 -71
%      ^ not digit character!

One simple and efficient solution is to remove those 'S' characters before using sscanf:

v = sscanf(strrep(f,'S',''),'%d');

This correctly returns all 4297 numbers in the string, and can be easily adapted (e.g. using regexprep to remove specific types of characters, e.g. if it is possible that other alphabetic characters might occur in the string).

The simplest and most efficient solution by far is this:

v = sscanf(f,'%d%*[S ]');

Nothing will beat that simple command in terms of simplicity or speed.

MATLAB: How to count specific numbers in a matrix

sum(X(:)>100);

Best Answer

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MATLAB: How to convert a char into double

MATLAB: How to count specific numbers in a matrix

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