David Hill

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3,760 total contributions since 2017

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Number Puzzle - 096

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Number Puzzle - 095

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Number Puzzle - 094

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Number Puzzle - 093

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number play

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Matlab Table - Temperature Coefficient of Resistance

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find a matrix D that contains the eigenvalues of A on its diagonal.

2 days ago

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Calculate the structural rank of a 2-by-4 matrix.

2 days ago

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Create a simple inline function y and compute its value at x = pi.

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Replace the last 3 x 3 submatrix of A

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Number Puzzle - 092

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Number Puzzle - 091

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Number Puzzle - 090

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Number Puzzle - 089

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Number Puzzle - 088

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Number Puzzle - 087

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Number Puzzle - 086

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Number Puzzle - 085

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How to find the index location of repeated consecutive numbers over a tolerance within a vector
This should work better. Did not previously think about multi-digit numbers. n=7;%minimum number of repeats a=num2str(~(diff(A...

2 days ago | 0

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Answered
Invalid use of operator...it is saying it has a problem with '&&' in line 52
To continue the line of code you need three dots ... if (3000*x + 1000*y + 2000*z) <= 24000 + tolerance ... && (1000*x + 1000*...

2 days ago | 0

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Answered
How to find the index location of repeated consecutive numbers over a tolerance within a vector
Likely lots of other ways. n=5;%minimum number of repeats idx=strfind(cell2mat(regexp(num2str(diff(A)),'[^- ]','match')),repma...

2 days ago | 0

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Index exceeds the number of array elements (1) ERROR - not sure why.
If you break your script at line 179, you can clearly see the problem. S10 is only a 1x1 array and needs to be a 49x1 like all t...

2 days ago | 0

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what does x='1' mean
The + converts the characters into their double equivalent so they can be added. double('1')+double('2');% = 99

2 days ago | 0

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what does x=6 means
You can run the code and find out the answer. This is all about logical operations. logical(6)&&logical(7);% by using && it con...

2 days ago | 0

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How to deleter specific elements from a matrix without changing its shape
Instead of deleting why not change them to nan? yourMatrix(yourMatrix>0.81)=nan;

2 days ago | 0

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How to reassign values to new array without using a loop
[~,idx]=ismember(dataVec2,dataVec1); newMat=oldMat(idx,:);

3 days ago | 1

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Calculate the Levenshtein distance between two strings
This problem description is lifted from <http://en.wikipedia.org/wiki/Levenshtein_distance>. The Levenshtein distance betwee...

4 days ago

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Smallest distance between a point and a rectangle
Given two points *x* and *y* placed at opposite corners of a rectangle, find the minimal euclidean distance between another poin...

4 days ago

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How to solve this equation?
f=@(h)h.^0.66+0.0805*h-0.045; fzero(f,0.008);%plot(0:.001:.1,f(0:.001:.1)) to get approximate location to root

4 days ago | 0

Answered
How to reorder a vector one cell at a time?
order = [1 3 1 5 1 1 7 1 8 1 1 9 4 1]'; a=order([find(order~=1);find(order==1)]); c=1; while ~isequal(order(:,c),a) c=c+1;...

4 days ago | 0