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How to import equation from GUI to functions?
Here is an example. Paste the code into a new M-file and run it. In the text box you can enter an equation which depends on x,...

13年以上前 | 1

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Can I plot rectangles without rescalling axis limits?
You need to post complete example code. I see no problems with this: ezplot(@sin) hold on rectangle('Position', [...

13年以上前 | 0

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Bargraph from variable length structure
As long as your x data does not contain duplicates: % Data. Note the x has no duplicates. variable.dataset(1).x = [1 2...

13年以上前 | 0

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is it possible to increment color and markers automatically for a plot in a loop?
You can do this: set(0,'DefaultAxesLineStyleOrder',{'+','o','*','.','x','s','d','^','v','>','<','p','h'}); Then look: ...

13年以上前 | 0

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selecting particular elements from a cell array
idx = all(cellfun(@(x) ~isequal(x,0),A(:,[1 3])),2) R = A(idx,[1 3 4 5])

13年以上前 | 1

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take line sum of part of matrix
Another: % Given data A = [1, 2, 54, 4, 5, 6;... 1, 2, 88, 4, 5, 6;... 1, 2, 0, 4, 5, 6]; b = [5;...

13年以上前 | 2

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HOW TO MOVE THE ELEMENTS BACK IN ORDER IN MATRICS WHICH ARE BEEN MOVED DIAGONALLY
Are you asking how to undo what your code does? for jj = -size(I,1) + 2 : size(I,2) - 2 a = diag(idx,jj); ...

13年以上前 | 1

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Does isdouble works in MATLAB
A = magic(3); B = single(A); isa(A,'double') isa(B,'double') If you need the isdouble function but don't have it, ...

13年以上前 | 2

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for loop options in Matlab
A = magic(5) cnt = 1; for jj = A disp(['Column #' num2str(cnt)]) disp(jj), cnt = cnt+1; end

13年以上前 | 1

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Anonymous function hyperbolic function code
When asking for help, please be as specific as possible. You get errors? *WHAT ERRORS*? snh = @(x) (exp(x)-exp(-x))/2 ...

13年以上前 | 0

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sum every 24 rows in a vector
If A is 8760-by-1, and you want to find the sum of every 24 elements, such that you will end up with 365 sums, then do: sum...

13年以上前 | 5

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How to update matrix values using algorithm based on position?
The straightforward way is to just use a loop: A = zeros(n); for ii = 1:n for jj = 1:n A(ii,jj) = 1/(ii+j...

14年弱前 | 0

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How to manipulate data provided by a user via a dialog box?
With cell array you have to access the contents using curly braces. Also note that the data is a string, not a number. ...

14年弱前 | 1

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Help with finding zero spots (fzero)
Here is a solution that uses your m-file function. Roots(1) = fzero(@f,0); Roots(2) = fzero(@f,2); Roots(4) = fzero(@...

14年弱前 | 0

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Preventing repeated sequences in a matrix
I think I figured out that Shuffle is on the FEX. Part of the problem is that you are just going to have more chance to get 3...

14年弱前 | 0

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how to create while statement
while ~all(A==1) % code here that changes A end

14年弱前 | 1

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Constructing a matrix from several diagonal matrixes (the code is included)
Replace your second loop with this: M = zeros(size(A)); for dd = min(v):max(v) Mcal = (diag(A,dd)+differance(a)...

14年弱前 | 0

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Correct Sprintf use on legend
Use: \\pm % The first \ escapes the use of the escape \. instead of: \pm

14年弱前 | 1

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How can I compute Jacobi Elliptic Functions in Matlab where the modulus is > 1?
Use (for m>1): sn(u,m) = sqrt(1/m)*sn(u*sqrt(m),1/m) cn(u,m) = dn(u*sqrt(m),1/m) dn(u,m) = cn(u*sqrt(m),...

14年弱前 | 0

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Question about variable in a vector.
You cannot rely on mixing types in a regular array. [3 4 A] may return an error message if A is not defined, or if A is n...

14年弱前 | 0

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sum() function in different Matlab version give different result
How different are the results, percent-wise? It is possible that the underlying algorithm has changed, and of course the or...

14年弱前 | 0

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stem3 with log axis - recovering stems
What happens is that a stem plot has the lines with on point on the z=0 plane. Taking the log of this throws this point to -inf....

14年弱前 | 0

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How to use scroll bar to view number of axes in the given figure window.
Here is an example. function [S] = scroll_plot() % Scroll through 8 plots. S.fh = figure('units','pixels',....

14年弱前 | 0

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Discussion

Share your favorite snippet or utility
I am wondering what others use for those little short-cuts or niceties in MATLAB. I have in mind something you wrote or somethi...

14年弱前 | 8

質問

Share your favorite snippet or utility
I am wondering what others use for those little short-cuts or niceties in MATLAB. I have in mind something you wrote or somethi...

14年弱前 | 11 件の回答 | 8

11

回答

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dimension mismatch error in Matlab
With code like this: A(i,:)=B(1,:); % Assume i is a scalar... you need to make sure that: size(B,2)==size(A,2) ...

14年弱前 | 0

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compute the mean of a field in a struct
The mean of 19 and 24 is *not* 33.5. mean([student.age])

14年弱前 | 5

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Questions about Fractions and integers?
A = 9; % Also try with A = 7/8; if floor(A)==A disp('Integer') else disp('fraction') end

14年弱前 | 0

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Updating Table Data not working
Where is the second piece of code in relation to the first piece? Strange, because it works just fine here: RN = {'a','b...

14年弱前 | 0

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Warning: Unable to interpret LaTeX string
First of all you really should learn to use SPRINTF instead of EVAL. Please look at the help for SPRINTF and do not use EVAL in...

14年弱前 | 3