답변 있음
How can I obtain the T and Y for R Runge Kutta method?
The first version has an error. This line: k3=h*feval(f,T(j),Y(j)); should be this instead: k3=h*feval(f,T(j)+h/2,Y(j)+k2/2);...

4년 초과 전 | 0

답변 있음
How to solve array indices error?
x1 = 0*ft; : distance1=sqrt((x1-x2)^2+(y1-y2)^2+(z1-z2)^2); : sp = distance1(x1,y1,z1,dx,dyv(i),dz); % incident di...

거의 5년 전 | 0

답변 있음
Solving ODE using Euler Method and 4th Order Runge Kutta Method
You pretty much have the Euler scheme worked out, so I will help you with a vector formulation. Take this code: for i=1:n ...

거의 5년 전 | 0

| 수락됨

답변 있음
Problem finding sum of array using vectorization
The first element of x is 1, so that element produces 1/(1-1) = 1/0 = inf in the second line. You need to rewrite that second li...

거의 5년 전 | 0

답변 있음
Multiplication of large matrix with its transpose
The fastest way is to simply write it as A * A', because MATLAB will see that the operands are the same and call a special multi...

거의 5년 전 | 0

답변 있음
Solving ODE in MATLAB using Runge-Kutta method of order 4
Why aren't you using this to update z: z(i+1) = z(i) + (1/6)*(l1+(2*l2)+(2*l3)+l4);

거의 5년 전 | 0

답변 있음
Why is the string type not implemented as standard type?
All of the standard full numeric types as well as char and logical are implemented as simple rectangular data arrays. The string...

거의 5년 전 | 1

답변 있음
how to print randomly selected column?
Shouldn't that be size(data,2)? Also, generally you should be using string comparison functions for the tests, not the == opera...

거의 5년 전 | 0

답변 있음
NaN shows up in matrix when solving my ODEs, how can I fix this?
"All of my matrices I am solving for have NaN after the third time line. How do I solved this issue?" Set up a breakpoint somew...

거의 5년 전 | 1

| 수락됨

답변 있음
Mean of multidimensional array
Doesn't mean(mdar,3) do what you want?

거의 5년 전 | 0

| 수락됨

답변 있음
Function Error: Array indices must be positive integers or logical values.
When you have parentheses appear on the left hand side of an assignment like this: v(ro,ri) = (sqrt(m/(ri)))*((1/sqrt(R))-((sqr...

거의 5년 전 | 1

| 수락됨

답변 있음
MXCREATEDOUBLEMATRIX memory overflow error
Rather later for an Answer, but here goes anyway: You should never use literal integers for API calls, because you can't be sur...

거의 5년 전 | 0

답변 있음
How can I solve x^4-1=0
doc roots

거의 5년 전 | 0

답변 있음
Convert unsigned integer to decimal
Not sure what the real question is here. Does one of these do what you want? int1 = uint32(hex2dec('9d900000')); int1 = uint32...

거의 5년 전 | 0

답변 있음
convert integer to bytes
Depending on what you are doing downstream with this, you can use the typecast( ) function. E.g., bytes = typecast(my_integer,'...

거의 5년 전 | 1

| 수락됨

답변 있음
Selecting multiple different rows in a 3D matrix
You can use a vector for the indexing. E.g., x = matrix(:,:,[2:16,24:48]); Does that, or something like that, do what you wan...

거의 5년 전 | 1

답변 있음
Using a variable vector in a loop
Suppose you store the column vectors in a matrix called V. Then vk would simply be V(:,k). And if the uj are stored in a matrix...

거의 5년 전 | 1

| 수락됨

답변 있음
Fortran code in Matlab
I'm trying to figure out the purpose of the backslash \. If this was the last character in the format statement then I would ass...

거의 5년 전 | 0

답변 있음
Assigning mxUint16 variable to plhs[0]
You cannot attach native C/C++ memory to an mxArray. The MATLAB API "mxSetEtc" functions check to see that the memory addresses ...

거의 5년 전 | 0

| 수락됨

답변 있음
How to separate a vector into two different vectors?
Others have already pointed out better ways of doing this. But to answer your question as to why your current code is not workin...

거의 5년 전 | 1

답변 있음
Nested "For Loop" Array Size
To keep the indexing the same, just use the top value from the loops. E.g., DataArray = nan(300,50,100,numel(inputValsY3)); No...

거의 5년 전 | 0

| 수락됨

답변 있음
convert value from radian form to degree form
If you have values, then just number_in_radians = number_in_degrees * (pi/180); If you are working with trig functions, note t...

거의 5년 전 | 0

답변 있음
Calculate taylor series using while loop
Looks like you are planning to use the identity ln(5) = ln((1/5)^-1) = -ln(1/5) and then use 1/5 as the x in the Taylor Series e...

거의 5년 전 | 0

답변 있음
How to multiply row of matrix A with column of matrix B?
Maybe this is what you want? C = sum(A .* B.',2)

거의 5년 전 | 0

| 수락됨

답변 있음
Create variable with names of cell array
See this link: https://www.mathworks.com/matlabcentral/answers/304528-tutorial-why-variables-should-not-be-named-dynamically-ev...

거의 5년 전 | 0

답변 있음
just started matlab just wondering how to set up a 'for' loop
Here is an outline to get you started: x = _____; nmax = _____; result = 0; for n=1:nmax result = result + _____; end ...

거의 5년 전 | 0

답변 있음
How can ı solve this triangle problem at MATLAB?
If you can find cos(x), you might look at feeding that into the acos( ) function to recover x.

거의 5년 전 | 1

| 수락됨

답변 있음
interpolation for 4cos(x) − ex = 0
Without seeing the text of your assignment, I would presume that this is the outline of what you are supposed to do: 1) Define ...

거의 5년 전 | 1

| 수락됨

답변 있음
Solving a large number (thousands) of different "Ax=b" equations when the matrices A are all the same small size (3x3 to 6x6), but different numbers.
See this FEX submission by Bruno Luong: https://www.mathworks.com/matlabcentral/fileexchange/24260-multiple-same-size-linear-so...

거의 5년 전 | 0

답변 있음
euler's method
Your code does not have enough states. You have a 2nd order ODE (the highest derivative present is 2), so the state vector need...

거의 5년 전 | 1