# Thorsten

### Universität Gießen

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Solved

Solve a System of Linear Equations

*Example*: If a system of linear equations in _x₁_ and _x₂_ is: 2 _x₁_ + _x₂_ = 2 _x₁...

mer än 3 år ago

Solved

Verify Law of Large Numbers

If a large number of fair N-sided dice are rolled, the average of the simulated rolls is likely to be close to the mean of 1,2,....

mer än 3 år ago

Solved

Find the Oldest Person in a Room

Given two input vectors: * |name| - user last names * |age| - corresponding age of the person Return the name of the ol...

mer än 3 år ago

Solved

Convert from Fahrenheit to Celsius

Given an input vector |F| containing temperature values in Fahrenheit, return an output vector |C| that contains the values in C...

mer än 3 år ago

Solved

Calculate Amount of Cake Frosting

Given two input variables |r| and |h|, which stand for the radius and height of a cake, calculate the surface area of the cake y...

mer än 3 år ago

how can I edit a matrix and rename it at the same time?

You can do it like this: my_matrix = rand(4,9); edited_matrix = my_matrix; edited_matrix(:,8) = [2;4;6;1];

mer än 4 år ago | 0

Different colours for arrows in quiver plot

Create a circular colormap: cmap = colormap(hsv(360)); In the loop: compute the angle and an index into the colormap from...

mer än 4 år ago | 1

| accepted

how do i change subfunctions to a switch

switch question case 1 % code of function 1 case 2 % code of function 2 case 3 % code of function 3 otherwise ...

mer än 4 år ago | 0

| accepted

Find the perfect overlay of 2 maps of points

You can maximize the number of perfect matches, that is the number of red points with zero distance to a blue point.

mer än 4 år ago | 0

one two three four

Replicate B such that is is as long or longer than A, then cut it to the length of A; B = repmat(B, 1, ceil(numel(A)/numel(B)...

mer än 4 år ago | 0

| accepted

Error using horzcat Dimensions of matrices being concatenated are not consistent.

You can only concatenate vectors horizontally if they have the same number of rows. But here you have 256 and 18 rows. sp this d...

mer än 4 år ago | 0

| accepted

Text in while loop creating matrix

You have to use cell arrays if you want to mix text and numbers. And fprintf returns the number of printed bytes, so you directl...

nästan 5 år ago | 0

could anyone help me how to check the idx position containing value is not equal to zero

To check if any value of idx is zero, you can use any(idx == 0)

nästan 5 år ago | 0

I have a 101 by 23 matrix, where first column is the ID of persons. I want to extract each value of every person <1.5, and store them in a new matrix, SO resultant matrix should have all values <1.5 and rest can be substituted to 0.

lowscale = numData; lowscale(lowscale < 1.5) = 0;

ungefär 5 år ago | 0

| accepted

Ich brauche Hilfe mit der Matrix

1:1 umgesetzt muss es doch 1 statt l heißen: verbraucher_AC=everything(s,1); leistung_AC=Leistungswert(s,1);

ungefär 5 år ago | 1

| accepted

Rearrange halves of yaxis in graph

i = find(x == 1.25); y = y([i+1:end, 1:i]);

ungefär 5 år ago | 1

How do i bring the user(cursor) to the 1st figure plot out of many figures ?

fig(1)

ungefär 5 år ago | 0

How can I generate random number between 1 and 10, and at the same time I want to exclude number 3 & 6?

x = setdiff(1:10, [3, 6]); r = x(randi(numel(x)));

ungefär 5 år ago | 4

| accepted

using 2 indexs for loop

for i=1:length(mHome) for k=1:2:size(mHome,2)-1 output1(i,k)=pdist([mHome(i,k:k+1);mBall(i,1:2)]); end end

ungefär 5 år ago | 1

| accepted

I keep getting undefined function when preallocating

index = 1:30; % Preallocate S1QAmb = zeros(size(index)); % index has to be defined before it can be used for i = index S...

ungefär 5 år ago | 0

| accepted

How to save the output of a loop with sequential file numbers.

for i:size(bounding_box, 1) face_crop = imcrop(I, [227,227]) filename = sprintf('%02d.jpg', 2*i - 1); imwrite(fac...

ungefär 5 år ago | 0

| accepted

Common legend for multiple histograms in subplots

Set the FaceColor explicitly before calling legend: set(line1, 'FaceColor', 'r') set(line2, 'FaceColor', 'g') set(lin...

nästan 6 år ago | 0

how to create a video with a looming stimulus

This version works without exporting. In the code you can first choose 'test' to see if the sequence of images is what you want ...

nästan 6 år ago | 0

Incorrect number of output arguments for 'pre_test_fixpt'. Expected 1, but found 2.

You show code for pre_test, but the error is about pre_test_fixpt. Have a look at how you call this function in your code.

nästan 6 år ago | 0

Why am I getting two different plots for the exact same matrix?

Maybe it helps if you transpose the matrix to get it right.

nästan 6 år ago | 0

Converting third dimension of 3D matrix to 1xN object

struct(ii).Image = A(:,:,ii);

nästan 6 år ago | 0

here I am trying to get the random matrix with the elements only 1 and 0 where none of columns and rows can be 0 only and also the number of 0s and 1s should be in a percentage of 30% and 70%.

N=5; % size ok = false; maxiter = 1000; i = 1; while ~ok & i < maxiter ...

nästan 6 år ago | 1

Setting certain pixels in a grayscale image to RGB (red) for MIP

From the above discussion, I came up with this solution: % fake some data X = rand(10, 10, 23); N = prod(size(X)); ...

nästan 6 år ago | 1

Calculate weighted average of a 2D matrix

X = rand(376, 481); w = rand(1, size(X, 2)); Xw = bsxfun(@times, X, w); m = mean(Xw, 2);

nästan 6 år ago | 0

How to make axis invisible? But not xlabel and ylabel!

The trick is to create handles to the labels and use these handles to re-set the color of the labels after the color of the axes...

nästan 6 år ago | 0