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Memory Size and Processor Speed
Yes you can run MATLAB on this. What tasks will you typically be using MATLAB for?

7 years ago | 0

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How to? - Complex numbers
E.g., for an anonymous function you need to give the input argument list first. E.g., for a generic derivative function that tak...

7 years ago | 0

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And/or between two 3d arrays
Do you mean this? sum(array1>250 & array2>170,3);

7 years ago | 0

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Function in Fortran to Funciton in Matlab
function result = F0(n,x) if( n<2 ) error('bad argument n in F0') end tox=2.0/x; bkm=F00(x); bk=F01(x); for j=1:n-1 ...

7 years ago | 1

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differentiating function & getting different answer
Perhaps you are shadowing the MATLAB function diff with a function of your own. Make sure diff is pointing to the MATLAB functio...

7 years ago | 0

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Invalid Syntax at '='.Possibly,a ),} or ] is missing at line 6 .
The { } formulation for blocking code is not valid MATLAB syntax. To fix this: Get rid of the open brace { Replace the close b...

7 years ago | 1

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use this vector and a mathematical expression to create the following vectors:
Yes. It works for me: >> x= [1, 2, 3, 4 ,5] x = 1 2 3 4 5 >> x1= x.*[1,128,243,64,5] x1 = 1 25...

7 years ago | 0

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Extracting matrix values for an algorithm
Something like this? xy = your n x 2 array n = size(xy,1); for k=1:n % run your algorithm here with x = xy(k,1) and y = ...

7 years ago | 1

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Basic power rule ((a^b)^c = a^(b*c)) does not work
This has been discussed in this forum before. Raising complex numbers to a power is a multi-valued operation. MATLAB picks one...

7 years ago | 1

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Is it possible to use logical indexing to specify between a number interval and include a value outside that interval.
E.g., Mask = ismember(str,[' ','a':'z','A':'Z']); Or using your method Mask = (65<=Ustr & Ustr<=90) | Ustr == 32;

7 years ago | 1

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BEGINNER PROBLEM: Trying to finish up an assignment but I am stuck with this error and am not sure how to fix
lab_total and assign_total and exam_total are all vectors, so the right hand side expression is a vector. You try to stuff that...

7 years ago | 1

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I have a problem with this ode45
I don't see anywhere in your code where you define i and j before using them as indexes into Phi0 and Z0, so they default to the...

7 years ago | 0

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Vector matrix multiplication with a condition
For later versions of MATLAB: c = all(A==B | A==2,2); For earlier versions: c = all(bsxfun(@eq,A,B) | A==2,2);

7 years ago | 0

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Can ode45 solve a ODE with space dependent parameters?
Yes. In general, if the derivative is a function of current state and time (even if there are vectors or matrices involved), the...

7 years ago | 2

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Is it possible to set rules for calculating permutations of column vectors?
Use the diff( ) function to calculate all of the permutations, and then count the number of valid ones. E.g., P = perms(1:i...

7 years ago | 1

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Get UNIX standard timestamp on MATLAB
You need to be careful about how you use the posixtime(t) function. From the documentation: "...If the time zone of t is not sp...

7 years ago | 3

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"To RESHAPE the number of elements must not change".This error occurs in line18.how to correct this error?
This expression is only going to work if size(a,1)*size(a,1) = numel(a): reshape(a,size(a,1),size(a,1),1); What are you trying...

7 years ago | 0

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Matlab crashes but Octave doesn't
What happens if you do the A\b differently? E.g., doing the LU decomposition manually and then backsolving yourself? Or doing pi...

7 years ago | 0

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R2018b real times complex multiplication
Probably related to the fact that complex variables changed to an interleaved storage format in R2018a. So my guess is this is w...

7 years ago | 2

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Write a function called WordProduct to calculate the alphabetic word product of a character vector.
Hints to get you started: Look at the upper( ) and lower( ) functions What happens if you subract 'a' or 'A' from your vector?...

7 years ago | 0

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Changing elements with a condition
clear X2 X3 [m,n] = size(X1); X2(2:m,2:n) = X1(1:m-1,1:n-1); X3(3:m,3:n) = X1(1:m-2,1:n-2);

7 years ago | 1

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I dont understand the vectors and element parts.
Typo. This j*y*(1) <-- Uses the full vector y times the scalar 1 should be this j*y(1) <-- Uses only the y(1) element

7 years ago | 0

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Efficient indexing with nested object and object arrays
Whether this works or not depends on what is in the properties, but have you tried simple concatenation on the rhs? [out] = [pa...

7 years ago | 0

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Matlab not squaring imaginary part of complex number.
Squaring complex numbers does not in general result in real numbers. It all depends on the phase angles involved (would need to ...

7 years ago | 0

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find roots of determinant
Since the determinant of a matrix is equal to the product of its eigenvalues, maybe you could work with eig(A(x)) instead and tr...

7 years ago | 0

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Rotation Matrix with euler angles
The best I can guess is you are given three Euler angles with a sigma for noise, and you want to output a corresponding rotation...

7 years ago | 0

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Finding all integer vectors between two vector bounds
You can use the FEX submission allcomb( ) by Jos for this: c = arrayfun(@(a,b)a:b,lb,ub,'uni',false); result = allcomb(c{:}); ...

7 years ago | 2

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Mex Code for Array Slicing
You are not going to get any performance boost for this in a mex routine. Since the m-code and the mex code both do deep data co...

7 years ago | 0

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Variables not displaying in workspace
The variables v, j, and heartrate are local variables and only exist inside the function MyHeartRateOG workspace. Once this func...

7 years ago | 2

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how can i get an improved Euler's method code for this function?
The "Modified" Euler's Method is usually referring to the 2nd order scheme where you average the current and next step derivativ...

7 years ago | 1