# gonzalo Mier

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**Content Feed**

How can I plot all iterations of my for loop?

Right now, each plot is plotting only one point. To achieve the behavior you want, create the vectors and plot them outside the ...

2 years ago | 1

| accepted

Question

How to find if a symbolic operation contains a or function?

I'm trying to find if a symbolic equation has the 'or' function or not. I have tried to do this: syms a b has(a|b,'or') % log...

2 years ago | 1 answer | 0

### 1

answerSolved

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]; ...

4 years 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

4 years 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 ...

4 years 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...

4 years 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...

4 years 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...

4 years 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...

4 years ago | 0

What is the fastest way to compute the first eigenvector?

Read about eigs

4 years ago | 0

| accepted

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...

4 years ago | 0

| accepted

How to import a 3D Python numpy array into Matlab ?

https://stackoverflow.com/questions/10997254/converting-numpy-arrays-to-matlab-and-vice-versa

4 years 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...

4 years 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_...

4 years 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

4 years ago | 0

| accepted

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 ...

4 years ago | 0

| accepted

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...

4 years ago | 0

| accepted

how can i make histogram without missing value(with nan,isnan)

You can remove nan before computing the histogram histogram(ws(~isnan(ws(:))))

4 years ago | 1

| accepted

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...

4 years ago | 0

| accepted

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,...

4 years ago

Solved

Divide by 4

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

4 years 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]

4 years 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

4 years ago

Solved

Basic arrays operations.

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

4 years ago