Answered
hex2num can't recover value from the hex by num2hex
Try typecast(uint32(hex2dec('be361af6')),'single')

6 years ago | 1

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Comparing any of the matrix input
Hints: What does this result give you: classes == x Then look at this: doc any

6 years ago | 0

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()-indexing must appear last in an index expression.
You've got closing and opening parentheses next to each other: ...)(... MATLAB thinks you are trying to use the second part as...

6 years ago | 0

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Rotation order of quatrotate
I suppose this drawn out explanation is long overdue in this forum, so forgive me for being verbose, but a lot of posters have h...

6 years ago | 7

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Answered
Single precision matrix multiplication
To illustrate what Matt is saying, a simple timing test: >> format longg >> S = round(10000*single(rand(5000)+rand(5000)*1i));...

6 years ago | 3

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Using MEX file with the main program of Fortran code
You would need to turn the PROGRAM line into a MEXFUNCTION line and add some code for getting the MATLAB variable data to/from t...

6 years ago | 0

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An explicit Runge Kutta of Fourteen Order code
4th Order RK is here: https://en.wikipedia.org/wiki/Runge%E2%80%93Kutta_methods

6 years ago | 0

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Answered
Why does mxSetDoubles crash this MEX file?
This line is crashing your code: mxSetDoubles(plhs[0],a); You can't re-use data pointers this way. You have essentially share...

6 years ago | 0

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Highest power of 2 that divides n.
In addition to David's comments, you need to do all of the calculations symbolically, so all of these should be sym: 2, i, r.

6 years ago | 0

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Answered
Can someone help me convert C++ to Matlab
The += and *= operators behave as follows: total_salary += daily_salary; becomes total_salary = total_salary + daily_salary; ...

6 years ago | 0

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Operands to the || and && operators must be convertible to logical scalar values
Did you mean this for u = 1:height<=u for v = 1:width<=v to be this for u = 1:height for v = 1:width

6 years ago | 0

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Answered
find max of vector
Two things. FIrst, you need to initialize pos = 1 before the loop starts. And second, you need to modify your if-test to do tw...

6 years ago | 0

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How to define an axis based on multiple quaternions?
Assume you have the following: q1 = quaternion from ECI to BODY at time1 (i.e., BODY1 frame) q2 = quaternion from ECI to BODY ...

6 years ago | 0

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Answered
Repeat elements of a vector as matrixes in a multidimensional array.
Another way: m = size of 1st dimension n = size of 2nd dimension v = your row vector result = reshape(repmat(v,m*n,1),m,n,[]...

6 years ago | 1

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Sorting numbers in an array without sort function
Simply set your "finished" flag depending on whether a swap was done or not. E.g., while true finished = 1; for i=1:s...

6 years ago | 0

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Answered
Need help finding intercept in a polynomial function
Why can't you just find the real roots of f(x)-600? What am I missing here?

6 years ago | 0

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Picking a random row of a matrix
k = randi(size(Y,1)); % the random row index Y(k,:) is the random row

6 years ago | 0

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Answered
Replacing all elements in a row with zeros, if atleast one of the elements in the row is greater than 1
Another method if you want the replacement in-place: A(any(A>1,2),:) = 0;

6 years ago | 0

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Answered
Large, unused cell aray in memory still slows down calculation significantly
Can you clarify if the above code is included in your timings? For all we know, you are simply showing that creating 44100 sepa...

6 years ago | 0

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ActiveX: how to pass a string array to cst in matlab？
Couple of things you might also try sWidth={'0.5';'1.1';'2.2';'3.3'}; or sWidth={'0.5';'1.1';'2.2';'3.3'}; sWidth = cellfun(...

6 years ago | 0

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I am having a lot of trouble with the built in mode function
You have inadvertently created a variable called "mode" that is shadowing the MATLAB mode( ) function. Track down where that is ...

6 years ago | 0

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Answered
Debugging matrix dimensions error
How to debug: Type the following at the MATLAB prompt: dbstop if error Then run your code. When the error occurs, the code wi...

6 years ago | 0

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Answered
Adding a row to an unknown matrix - the row consists of the mean value of the columns of the unknown matrix.
Hints: doc mean The last row of the matrix A is A(end,:). Then ask yourself: What would be the indexing of one row beyond "en...

6 years ago | 1

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Answered
Table of Matlab release features
Note that a similar list of version specific mex related features (mxArray changes, API functions, etc.) can be found here in th...

6 years ago | 4

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Matrix multiplication using multicore
The matrix multiply operator * calls a highy optimized compiled BLAS library to do this calculation. The BLAS library is alread...

6 years ago | 0

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How to write a function
MATLAB is case sensitive, Output is not the same variable as output. Also, you need to square the Top value, and depending on w...

6 years ago | 0

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How to efficiently do matrix multiplication for 2 specific dimensions of the tensor?
Some FEX options that might work for you (some require an installed C compiler): https://www.mathworks.com/matlabcentral/fileex...

6 years ago | 0

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Answered
ode45 given a systems of equations help
First, look over the examples in the ode45 doc. Then figure out the order of your system, and that will tell you the size of yo...

6 years ago | 0

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Create an Array of vectors within a for loop
If you want to store the column vectors, you could use cell arrays. E.g., k = 1; for j=0:100:5000; : [PXX{k},F{k...

6 years ago | 0

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Answered
ODE matlab, handling variables
You can't do this if the derivative yd depends on k. The ode solvers need to have consistency when calling the derivative funct...

6 years ago | 0

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