Respondida
Can classes be made unsaveable
No. When a class object is saved, the saveobj method for that class gets called, if it exists. If this method throws an error, i...

alrededor de 12 años hace | 0

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Pregunta

Can classes be made unsaveable
Is there a way to define a class such that the MATLAB save() function throws an error when it tries to save an instance of that ...

alrededor de 12 años hace | 1 respuesta | 1

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respuesta

Respondida
Optimization problem - reducing the time needed to solve
ConstLM.m looks very inefficient to me. I think those loops can be vectorized. Profile your code, and learn about vectorization....

alrededor de 12 años hace | 0

Respondida
Interpolation between matrices (image attached)
Your query location, (0,10), is in the center of your grid, so if you want a linear interpolation between the input matrices you...

alrededor de 12 años hace | 0

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Respondida
difference between imadd and imfuse
Yes.

alrededor de 12 años hace | 0

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Resuelto

Sum all integers from 1 to 2^n
Given the number x, y must be the summation of all integers from 1 to 2^x. For instance if x=2 then y must be 1+2+3+4=10.

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Resuelto

Free passes for everyone!
_Simply return the name of the coolest numerical computation software ever_ *Extra reward* (get a _freepass_): As an addit...

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Resuelto

Function Iterator
Given a handle fh to a function which takes a scalar input and returns a scalar output and an integer n >= 1, return a handle f...

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Resuelto

Remove any row in which a NaN appears
Given the matrix A, return B in which all the rows that have one or more <http://www.mathworks.com/help/techdoc/ref/nan.html NaN...

más de 12 años hace

Resuelto

Finding Perfect Squares
Given a vector of numbers, return true if one of the numbers is a square of one of the other numbers. Otherwise return false. E...

más de 12 años hace

Resuelto

Who Has the Most Change?
You have a matrix for which each row is a person and the columns represent the number of quarters, nickels, dimes, and pennies t...

más de 12 años hace

Resuelto

Fibonacci sequence
Calculate the nth Fibonacci number. Given n, return f where f = fib(n) and f(1) = 1, f(2) = 1, f(3) = 2, ... Examples: Inpu...

más de 12 años hace

Resuelto

Pizza!
Given a circular pizza with radius _z_ and thickness _a_, return the pizza's volume. [ _z_ is first input argument.] Non-scor...

más de 12 años hace

Respondida
Saving axes to file - trouble with copyobj and export_fig
Regarding the error using export_fig, it seems you didn't install the package correctly.

más de 12 años hace | 0

Respondida
export_fig can't do Monospace?
Export_fig supports Courier, and that is monospaced. For hints on why the other fonts you mentioned might not be working, see...

más de 12 años hace | 0

Respondida
Is there a way to make device memory persist between CUDA MEX calls
Yes, you can reinterpret_cast the pointer to an integer of a sufficient bit length, e.g. uint64, and return this to MATLAB. Then...

más de 12 años hace | 2

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Respondida
Indexing multiple values over large array?
histc outputs the bin index of each input value in the second output argument. So you can do: [~, ind] = histc(vals); va...

más de 12 años hace | 0

Respondida
Gray Image to Color Indexed Image
Use the <http://www.mathworks.co.uk/matlabcentral/fileexchange/16233 sc()> package. A = sc(image, [0.4 1], 'hsv');

más de 12 años hace | 0

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Respondida
PNG image created in Matlab shows up as all black in imshow
If you read the imshow help text, you'll see that the range only applies to grayscale images. Try: imshow(double(A)/4095);...

más de 12 años hace | 0

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Respondida
How to optimise/vectorize loop containing the function "imrotate", using multiple images and angles as input
Assuming your 900 input images are all the same size, you could: # For each rotation angle, compute the location of each rota...

más de 12 años hace | 0

Resuelto

Create times-tables
At one time or another, we all had to memorize boring times tables. 5 times 5 is 25. 5 times 6 is 30. 12 times 12 is way more th...

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Resuelto

Weighted average
Given two lists of numbers, determine the weighted average. Example [1 2 3] and [10 15 20] should result in 33.333...

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Resuelto

Triangle Numbers
Triangle numbers are the sums of successive integers. So 6 is a triangle number because 6 = 1 + 2 + 3 which can be displa...

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Resuelto

Column Removal
Remove the nth column from input matrix A and return the resulting matrix in output B. So if A = [1 2 3; 4 5 6]; and ...

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Resuelto

Add two numbers
Given a and b, return the sum a+b in c.

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Respondida
bitget for array (count no. of bits)
I assume from your question that you actually want to do a vectorized bitcount, rather than a vectorized bitget. If that is corr...

más de 12 años hace | 0

Respondida
Which MATLAB operations/functions need speeding up?
Linear 2D interpolation for multi-channel images A common computation in computer vision, and many other fields, is sampling ...

más de 12 años hace | 0

Respondida
What functions can benefit from simple patching?
I gave a patch for saveas <http://www.mathworks.co.uk/matlabcentral/answers/13085#answer_17979 here>.

más de 12 años hace | 0

Respondida
Which MATLAB operations/functions need speeding up?
REPMAT Repmat is unnecessarily slow. Internally it produces an index array, which it then uses to create the output array. Th...

más de 12 años hace | 0

Respondida
Which MATLAB operations/functions need speeding up?
BSXFUN with builtin functions Bsxfun is useful in that it allows us to vectorize elementwise operations between arrays of dif...

más de 12 años hace | 2