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I want to convert vector into matrix with all possible combinations
I think John D'Errico answered this some time ago, or a question very much like this. But I can't find his post at the moment. I...

1年以上前 | 0

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Can compare between vector and array
Does this do what you want? Finds the row numbers in A that match x. find(all(A==x,2))

1年以上前 | 0

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Modify off diagonal elements of Matrix without looping
You could use logical indexing to get at the off-diagonal elements. E.g., A(~eye(size(A))) = skalar;

1年以上前 | 0

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How to get two 16-bit numbers from a 32bit number
E.g., to split a uint32 into two uint16 you can use typecast( ): result = typecast(your_variable,'uint16') This result will co...

1年以上前 | 0

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pass a vector from matlab to a c++ program
This really depends on what your C++ program does, but the simplest approach is to use a mex routine. You will need a supported ...

1年以上前 | 0

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Write multiple variables from a function
Maybe something like this does what you want, with each qq1 and qq2 2D page results in the first two dimensions. [m n] = size(s...

1年以上前 | 0

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In an assignment A(I) = B, the number of elements in B and I must be the same.
" And in the work space y2 is 3x1 and d is 1x1 " Then d - y2 will be 3x1. You can't assign a 3-element vector to a 1x1 scalar w...

1年以上前 | 0

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After the if statement is ran why is the answer 10?
A=1; : if A<0 A is not negative, so the body of the if-test never runs.

1年以上前 | 0

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Solve nonlinear 2nd order ODE numerically
You can look at the examples for ode45( ) here: https://www.mathworks.com/help/matlab/ref/ode45.html?searchHighlight=ode45&s_ti...

1年以上前 | 1

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The input function does not work well
Pass in a vector using the square brackets. E.g., binary_to_decimal([1 0 0 1 1 0])

1年以上前 | 0

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Concatenate logical/numerical arrays element wise
Here is one way: % Generate sample data H{1} = rand(2,3)<0.5; H{2} = rand(2,3)<0.5; H{3} = rand(2,3)<0.5; Hc = cat(3,H{:}) ...

1年以上前 | 2

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What is the difference between " while 1" and "while true", Should I use one over the other?
1 is a double class scalar and true is a logical class scalar, so the check for "non-zero" is slightly different for each even t...

1年以上前 | 0

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I have a 4 Dimensional Matrix and i want to get its transpose
Maybe this does what you want, which is transpose the first two dimensions: permute(val,[2 1 3 4]) Or you could use this funct...

2年弱前 | 0

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How to multiply a 3d array with a 2d matrix?
It would be best if your 2D pages were the first two dimensions. That way the 2D pages are contiguous in memory and you can use ...

2年弱前 | 1

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Error in concatination in binary values
c1=[8 14 10 9 6 3 2 7 6 11 6 3 13 15 6 0]; NewR = c1(1:2:end)*16 + c1(2:2:end)

2年弱前 | 0

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Increased time for setting elements in sparse matrix
Every time you change the elements of a sparse matrix, MATLAB has to deep copy all the existing elements to a newly allocated ch...

2年弱前 | 1

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How to run a Matlab file which uses functions from .c and .dll files?
It appears that this may be an older mex routine? Is there a "mexFunction" in the c file? If so, maybe you can just recompile it...

2年弱前 | 1

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Unable to perform assignment because the left and right sides have a different number of elements.
Why are you replacing the sin(y-c) term with approximations? Why haven't you just programmed it as is? It appears you have done ...

2年弱前 | 0

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Applying runge kutta for coupled equations
What are and ? Why don't they have differential equations associated with them? Can you give more details about this? Also, it...

2年弱前 | 0

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How to create a loop on function handle
Isn't this just a standard matrix*vector multiply? E.g., XI = @(xi) xi - (y(i,:) + A*((t(i)+c*dt).*xi)*dt); Note that this fun...

2年弱前 | 1

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Index Matrix A and Matrix B Problems
You can use logical indexing: B(A==1) = 0; You can use a loop for this also, but you would have to show us the code you used b...

2年弱前 | 1

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Whole derivation of two variable differential function
Please show the code you are using. y' means derivative of y with respect to x, not derivative of y with respect to y. You sho...

2年弱前 | 0

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How do i compile multiple fortran code from matlab command
To pass variables from MATLAB to your Fortran code you would typically do the following: Write a single gateway routine in a se...

2年弱前 | 0

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Updating Sparse Matrices every Time-Step Efficiently
To specify the sparse matrix size when creating it, use the following syntax: sparse(I,J,K,m,n) where m is the number of rows ...

2年弱前 | 0

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how to move a row
result = M([1:400,801,401:800,802])

2年弱前 | 1

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How to set specific size of a figure with exportgraphics?
This doesn't answer your question about controlling exported sizes, but you might be interested in the following export_fig FEX ...

2年弱前 | 0

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Renaming the variabel while Symbolic to function handle conversion with matlabFunction
You could keep your existing code and create another function handle: funcv = @(A,xdata,ydata)func(A(1),A(2),xdata,ydata)

2年弱前 | 0

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Making an Array out of another Array if conditions are met
You don't need a for-loop for this. The best way is to use logical indexing. See this link: https://www.mathworks.com/help/matl...

2年弱前 | 0

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How to remove February 29th for leap years in a daily time series over 43 years?
To get rid of the leap days, you can use evenly spaced indexing since the number of days between leap days is constant for your ...

2年弱前 | 0

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I would like to write a for loop to store all values of y when A=1,2,3,4,5. into a variable y1,y2,y3,y4,y5 respectively. Any help will be greatly appreciated. Thanks
No loop needed, and no need to create multiple variables to hold results. Just use implicit array expansion and hold results in ...

2年弱前 | 0

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