Answered
saving multiple vectors with different lengths in one matrix
You can use cell arrays, or pad with zeros. For example: v1 = [2 3 4 5]; v2 = [2 3 4 5 6 7]; % Make padded array. Co...

15 years ago | 26

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Answered
Converting hhmmss.mmm to hh:mm:ss.mmm, or something like that
It is not clear to me whether you want a number or another string in a different format. If you want a number, stop after the f...

15 years ago | 0

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Subtract combinations of variables in a vector
Another approach: S = -diff(nchoosek(vec,2),[],2)

15 years ago | 1

Answered
Help with commands varargin and switch
Probably the best thing is for you to read the doc on these topics. <http://www.mathworks.com/help/techdoc/ref/varargin.html VA...

15 years ago | 1

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Answered
How do I make a function read all the images in a directory?
I = dir('*.jpg'); % or jpeg or whatever. for ii = 1:length(I) C{ii} = imread(I(ii).name); % Store in a cell array....

15 years ago | 1

Answered
Division of a square
I am not sure this is what you mean, but here is a graphical demonstration of what I think you mean. % Data n = 16; % Div...

15 years ago | 1

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Answered
extract matrix from for loop
Use cell arrays, or stack along the third dimension. for loop=1:1:10 m=[a b c d]; % I assume this is only a place-holde...

15 years ago | 1

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Answered
expanding matrix
Here is a general purpose file for doing the same thing. What you are basically doing is finding the permutations of the set [x...

15 years ago | 1

Answered
Order two related vectors
For example: A = [3 1 4 2]; B = {'Bob' 'Jeff' 'Mike' 'Len'}; [As,I] = sort(A);As Bs = B(I)

15 years ago | 0

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Answered
Polyfitting warning
I'll take you at your word that you know what you are doing. ws = warning('off','all'); % Turn off warning P = poly...

15 years ago | 1

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Answered
Anyone know a good resource for using Bloomberg through MATLAB?
A quick search of the FEX leads to <http://www.mathworks.com/matlabcentral/fileexchange/?term=Bloomberg several candidates>.

15 years ago | 0

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Stop a calculation
About the only thing you can do in general is hold down the control key and the c key at the same time. If MATLAB is really inv...

15 years ago | 2

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Answered
FInd vector in matrix
For example: A = reshape(1:12,6,2) % A sample matrix for demonstration... I = ismember(A,[4 10],'rows'); If you want to ...

15 years ago | 1

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How can i find "AND" or "OR" of rows in a matrix?
A = round(rand(3,10)) all(A) % A(1,:) & A(2,:) & A(3,:) any(A) % A(1,:) | A(2,:) | A(3,:)

15 years ago | 1

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Combination calculations and matrix manipulation
Here is how to get all of them using <http://www.mathworks.com/matlabcentral/fileexchange/11462-npermutek NPERMUTEK> A = [...

15 years ago | 0

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Answered
Sum of Maple to MATLAB
It would help, for those of us who do not have Maple and consequently do not know what the result of that Maple command is, if y...

15 years ago | 0

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Problems with fscanf
For some reason FOPEN did not find dados.txt. Is it in your current directory?

15 years ago | 0

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Integration Problem
Don't use symbolic variables for numerical problems. I assume you want a numeric answer because you are using numeric routines ...

15 years ago | 0

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Answered
UIGetfile Operation - Appears to OPEN/COPY .mat files, opposite what the documentation says?
I don't know why the MAT-file would show up under Recent unless (as you are aware) it is being opened. Have you tried a custom ...

15 years ago | 0

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Answered
Error message not connected
t = serial(...) % Try to open the connections. u = serial(...) try fopen(...) catch errordlg('First Motor no...

15 years ago | 0

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Answered
Image Pixel Values
In addition to what others have said, this line: if z = impixelinfo(m,n) >=1 % Are you sure about the 1? is an incorrect us...

15 years ago | 1

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how to get my plp?
<http://www.mathworks.com/support/install.html Contact MathWorks support>.

15 years ago | 0

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ode45 - solving 2nd Order ODE IVP problem
[t,y] = ode45(@lander, 0:.005:6, [20,67.056]); % Calculate the acceleration from the velocity... acc = diff(y(:,2))/(t(2)-...

15 years ago | 1

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Answered
How i can estimate the hurst parameter for a matrix of topographic data?
Would you mind elaborating on what "It doesn't work" means? Does it error? If so, what does the error message say. If not, wh...

15 years ago | 0

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String array and Numeric values
% Say your String cell looks like this: S = {'Ted' 'Jim' 'Nancy'} % To change by name: cname = 'ted'; % User want...

15 years ago | 1

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how to save outputs of a loop in vectors to use later ??? urgent please help
I don't see a th2. Assuming you meant one point per loop iteration... l1=0;%input('input l1: '); l2=3;%input('input l2: '...

15 years ago | 1

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Answered
dividing a circle into six equal parts
You could write a custom function to do this: function P = plot_arc(a,b,h,k,r) % Plot a circular arc as a pie wedge. % a ...

15 years ago | 0

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Answered
adding numbers in an M file
A loopless version... a = input('Enter number of days you would like to know the total of: '); S = sum(.01.*2.^(0:(a-1))) ...

15 years ago | 0

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Interpreter. Computational time
SIZE and LENGTH are not the same thing! size(rand(2,10000),1) length(rand(2,10000)) You should show what your data loo...

15 years ago | 0

Answered
Interactive graph and data collection
Have you looked at the <http://www.mathworks.com/help/techdoc/ref/ginput.html GINPUT> function?

15 years ago | 0

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