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# Paulo Cerqueira

##### Last seen: 10 maanden ago
16 total contributions since 2019

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Sparse solver for non-square regressor matrix.
If anyone's interested, "SuiteSparseQR: Multifrontal Multithreaded Rank-Revealing Sparse QR Factorization" by Timothy Davis deta...

10 maanden ago | 0

| accepted

Question

Sparse solver for non-square regressor matrix.
When using the backslash operator to solve the least squares problem for , where is highly sparse and non-square, MATLAB seems...

11 maanden ago | 1 answer | 0

### 1

Solved

Replace 0 indices in array with 1's
Take a incoming vector, and replace 0's with ones

ongeveer een jaar ago

Solved

write a function to calculate the snr after quantizing the signal in dB
osig : original signal qsig : quantized signal qerror : quantization error HINT: snr = 10×log10(sum(osig × osig)/sum...

ongeveer een jaar ago

Solved

Multiply by 3
Given the variable x as your input, multiply it by three and put the result in y.

ongeveer een jaar ago

Solved

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

ongeveer een jaar ago

Solved

Tick. Tock. Tick. Tock. Tick. Tock. Tick. Tock. Tick. Tock.
Submit your answer to this problem a multiple of 5 seconds after the hour. Your answer is irrelevant; the only thing that matte...

ongeveer een jaar ago

Solved

length of a vector
Find twice the length of a given vector.

ongeveer een jaar ago

Solved

square root
Find the square root (y) of an input (x).

ongeveer een jaar ago

Solved

easy problem
Find the last element of the array

ongeveer een jaar ago

Solved

Find the dimensions of a matrix
Just find the number of columns of the given matrix. Example x = [1 2 3 4 5 6] y = 2

ongeveer een jaar ago

Solved

dễ dàng
cho 2 số. tính tích của chúng

ongeveer een jaar ago

Solved

Chào các bạn.
Cho 3 số. Tính tổng của chúng

ongeveer een jaar ago

Solved

Select every other element of a vector
Write a function which returns every other element of the vector passed in. That is, it returns the all odd-numbered elements, s...

ongeveer een jaar ago

Solved

Multiply 2 numbers
Very easy, you just have to multiply 2 numbers but you cannot use the following signs (*, /, - ,^) ,mtimes , times, cross, pro...

ongeveer een jaar ago

Solved

Find the nearest integer
Given a vector of integers and a real number find the closest integer. EX: >> a = [2 4 5 6 8 10]; >> b = 4.6; >> nea...

ongeveer een jaar ago