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# gonzalo Mier

##### Last seen: 6 Tage ago
96 total contributions since 2017

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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]; ...

9 Monate ago

How to change the parameters of a loop
figure; for i=1:9 A(((i-1):i)*9+1) = instructions(i) plot(A(((i-1):i)*9+1)) end

9 Monate ago | 0

Setting pixel to maximum color values in grayscale image.
You can use uint8 to saturate all the values between 0 and 255. You can test it as: gray_as_RGB = uint8(repmat(grayimg, [1 1 ...

10 Monate ago | 0

How to solve this question?
Oh, a really interesting problem. Lets try to solve it as easy as possible... Lets propose some ideas: Sum two constant numbe...

10 Monate ago | 0

Standard deviation of decimal numbers
The error you are obtaining is less than 1e-15, which is 0 in practice. If you want to consider this case, you can use a thresho...

10 Monate ago | 1

Norm function for 2 variables
n = norm(v) returns the Euclidean norm of vector v. This norm is also called the 2-norm, vector magnitude, or Euclidean leng...

10 Monate ago | 0

PARFOR Transparency violation error
Parfor loop don't work in GPU, it just multithread your CPU code, so you have to be careful with the variables you use because a...

10 Monate ago | 0

What is the fastest way to compute the first eigenvector?

10 Monate ago | 0

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Why do i get a blank graph?
You are computing v1 as k1= 0.8*exp(-Ea1/(alpha*R*X(3))); v1=k1*A*X(1); v1 is a matriz of size 1x1. So when you do plot( "v...

10 Monate ago | 0

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How to import a 3D Python numpy array into Matlab ?
https://stackoverflow.com/questions/10997254/converting-numpy-arrays-to-matlab-and-vice-versa

11 Monate ago | 0

Is it possible to do multiple array of data on the same scatter plot;
Scatterplot is a really special function that needs a special syntax to plot more that one scatterplot together. If you need mo...

11 Monate ago | 1

| accepted

could anyone help me to solve my question
You don't need if here. You can mix them as: C = B; len_A = min(size(B,1),size(A,1)); C(1:len_A,:) = C(1:len_A,:) - A(1:len_...

11 Monate ago | 0

How do I create a matlab function using polyder that not only gives the coefficients but also gives the equation
I think you need here the function poly2sym: https://www.mathworks.com/help/symbolic/poly2sym.html

11 Monate ago | 0

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Needs derivative w.r.t. ' y ' & then graph w.r.t ' t '
diff is a function of the symbolic package, so when you try to derivate U, you are derivating a constant, and by a constant, so ...

11 Monate ago | 0

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Extracting histogram each row of matrix

11 Monate ago | 0

Matlab plots y axis values in plot for array of x arrays
There is no problem here. Matlab is doing what you want. The problem that you see may be because you have one row that is in a l...

11 Monate ago | 0

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how can i make histogram without missing value(with nan,isnan)
You can remove nan before computing the histogram histogram(ws(~isnan(ws(:))))

11 Monate ago | 1

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How to get string field from struct with each element separated
The problem is you are using char instead of string. '1.33' is a vector of char, so if you make a vector of vectors, it compiles...

11 Monate ago | 0

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Solved

Check if number exists in vector
Return 1 if number _a_ exists in vector _b_ otherwise return 0. a = 3; b = [1,2,4]; Returns 0. a = 3; b = [1,...

11 Monate ago

Solved

Divide by 4
Given the variable x as your input, divide it by four and put the result in y.

11 Monate ago

Solved

Reverse the vector
Reverse the vector elements. Example: Input x = [1,2,3,4,5,6,7,8,9] Output y = [9,8,7,6,5,4,3,2,1]

11 Monate ago

Solved

Swap two numbers
Example Input: a = 10 b = 20 Output a = 20 b = 10

11 Monate ago

Solved

find the surface area of a cube
given cube side length x, find the surface area of the cube, set it equal to y

11 Monate ago

Solved

Vectors counting by 2
Create a vector numbers from 7 to 15 in increments of 2

11 Monate ago

Solved

Min of a Matrix
Return the minimum value in the given matrix.

11 Monate ago

Solved

factorial of a number x
Factorial of a number x

11 Monate ago

Solved

Counting down
Create a vector that counts from 450 to 200 in increments of 10.

11 Monate ago

Solved

Basic arrays operations.
Apply element-by-element binary operation 'fun' to two arrays (A and B).

11 Monate ago

Solved

Is my wife right?
Regardless of input, output the string 'yes'.

11 Monate ago

Solved

Vector creation
Create a vector using square brackets going from 1 to the given value x in steps on 1. Hint: use increment.

11 Monate ago