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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]; ...

5 months ago

Answered

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

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

5 months ago | 0

Answered

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 ...

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 ...

5 months ago | 0

Answered

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...

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...

5 months ago | 0

Answered

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...

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...

5 months ago | 1

Answered

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...

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...

5 months ago | 0

Answered

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...

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...

6 months ago | 0

Answered

What is the fastest way to compute the first eigenvector?

Read about eigs

What is the fastest way to compute the first eigenvector?

Read about eigs

6 months ago | 0

| accepted

Answered

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...

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...

6 months ago | 0

| accepted

Answered

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

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

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

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

7 months ago | 0

Answered

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...

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...

7 months ago | 1

| accepted

Answered

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_...

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_...

7 months ago | 0

Answered

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

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

7 months ago | 0

| accepted

Answered

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 ...

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 ...

7 months ago | 0

| accepted

Answered

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...

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...

7 months ago | 0

| accepted

Answered

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

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

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

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

7 months ago | 1

| accepted

Answered

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...

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...

7 months 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,...

7 months ago

Solved

Divide by 4

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

7 months 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]

7 months 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

7 months ago

Solved

Basic arrays operations.

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

7 months 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.

7 months ago