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Why do i keep getting this," Incorrect use of '=' operator." error?
This is not valid MATLAB syntax: for m=1:M & n=0:N Maybe you wanted nested for loops? for m=1:M for n=0:N z = z+...

6 years ago | 0

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Add Consecutive Numbers sent to a Matrix in a Matlab Function
Sounds like maybe you want persistent variable behavior. E.g., function travel_dist = DeltaDistance(x) persistent y if( isemp...

6 years ago | 0

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Recursive definition of anonymous function
@(x) STUFF Takes a snapshot of all of the workspace variables used in STUFF in order to create the function handle. It doesn't...

6 years ago | 1

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help PLease, RK4!
You left out some * operators on the k2 and k3. This fy = @(time,x1,x2,x3) m2*x2+c3*(x2-x3)+c2*(x2-x1)+k3*(x2-x3)+k2(x2-x1); f...

6 years ago | 1

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OpenMP in mex file only produces 1 thread
What if you try to force it? E.g., #pragma omp parallel num_threads(omp_get_max_threads()) Or maybe omp_set_num_threads(omp_...

6 years ago | 1

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Answered
if x=0
x = input('x value: '); y = input('y value: '); k = x * y; if k == 6 % <-- Use == for equality test k1 = 2; elseif k ...

6 years ago | 0

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Performing calculations on a vector
The log10( ) function is vectorized, so just this result = 20 * log10(4*pi*d./lambda);

6 years ago | 0

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Rename Matrix in Using String
Suppose you could somehow rename your variable to the name contained in filename. What would you do next? How would you access...

6 years ago | 0

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Scalar max of cell array with structure
If you reshape the input first, a one-liner version of your code: peak = max(cellfun(@(x) max(abs(x.noise(:))),myCell(:))); ...

6 years ago | 0

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Sum of sequence with accuracy
exp(-x) will calculate that sum.

6 years ago | 1

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Need help solving this problem with newtons method
To match how you are calling it, you need to switch the order of the arguments in this function handle: F = @(p, t) k*p*(L-p)-a...

6 years ago | 0

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Operators "concatenation" ?
No. MATLAB syntax does not allow using ( ) or { } right after a function call. You could of course create a third function to d...

6 years ago | 0

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Time of sparse matrix components allocation
Every time you add even one element to a sparse matrix, it has to copy data ... perhaps all of the current data ... to make room...

6 years ago | 0

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How to get matrix data from function ,anyone help me
Not sure what the real question is. Maybe this does what you want? function [apZ,atZ]=example(a,Z) apZ = a + Z;...

6 years ago | 0

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Order a string row based on another string row by matching each element (like the sort function does)
One way: [~,idxb] = sort(B1); [~,idxa] = sort(idxb); A1new = A1(idxa); A2new = A2(idxa);

6 years ago | 0

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How to get multiple roots of x
How are you solving it now? Maybe you just need to feed your method different starting guesses.

6 years ago | 0

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Future Bank Account Balance
This line overwrites your old balance vector with a scalar oldbalance = newbalance(i); Instead of keeping track of old balance...

6 years ago | 0

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How to compare elements with above and below element in a column?
Is this what you want? for T = 2:M if( abs(A(T,4) - A(T-1,4)) > 50 ) A(T,4) = 0; end end

6 years ago | 0

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How do I single out elements in a vector?
Hints: You might look at the mod( ) or rem( ) function to determine if values are even. To determine how many are even, you cou...

6 years ago | 0

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Matlab crashes while running MEX Fortran 90 routine
Three comments: 1) You should NEVER, NEVER, NEVER pass literal integers into mex API functions. It can often be the case that ...

6 years ago | 0

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Troubles with data types: integers, doubles, scientific notation, and type casting
You are confusing integer "types" with integer "values". Integer types are int8, uint8, ... int16, uint64. Integer values a 1,...

6 years ago | 0

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Error using * Inner matrix dimensions must agree.
Use element-wise operators (with the dot .) instead of matrix operators (without the dot .), e.g., x1= 1 - (exp(-(t/4))).*(cos(...

6 years ago | 0

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Cant Use Reshape Function with Randi or Randperm
I'm guessing you need to tell this dec2bin call that it always needs to produce 16 digits also: permboxin_temp = dec2bin(permbo...

6 years ago | 0

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Using for loop to match generated random numbers to an input value
Since you don't know ahead of time how many tries it will take, this is best done with a while loop instead of a for loop. E.g.,...

6 years ago | 0

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How can I append a new cell onto the end of a Cell Array?
If F really is a cell array in the format you list, then just C(end+1) = F; If not, then you may have to do this: C(end+1) = ...

6 years ago | 0

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Nonscalar arrays of function handles are not allowed; use cell arrays instead.
You don't need to create an array of function handles. You just need to construct one function handle to use for that iteration....

6 years ago | 0

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Forward Euler method for Higher order differential equation
You need to think of Y as your three element column vector as you have defined. So at each step you are dealing with a column v...

6 years ago | 1

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Subscript indices must either be real positive integers or logicals while k starts from 1 .
The RK4( ) function expects to call the derivative function with the signature F(tt,y), i.e. time is the 1st argument. But your...

6 years ago | 1

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My matrix should be symmetric but isn't by a ridiculous margin
Welcome to the world of floating point arithmetic. This is typical and not unusual behavior. https://www.mathworks.com/matlabc...

6 years ago | 0

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Plot a 100x100 grid of 1's and 0's
Another option: b = your binary matrix spy(b);

6 years ago | 0