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# Thorsten

### Universität Gießen

1,506 total contributions since 2013

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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];

5 months 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...

5 months ago | 1

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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 ...

5 months ago | 0

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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.

5 months 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)...

5 months ago | 0

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...

5 months ago | 0

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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...

9 months 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)

10 months ago | 0

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);

11 months ago | 1

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Rearrange halves of yaxis in graph
i = find(x == 1.25); y = y([i+1:end, 1:i]);

12 months ago | 1

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)));

1 year ago | 1

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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

1 year ago | 1

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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...

1 year ago | 0

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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...

1 year ago | 0

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Common legend for multiple histograms in subplots
Set the FaceColor explicitly before calling legend: set(line1, 'FaceColor', 'r') set(line2, 'FaceColor', 'g') set(lin...

1 year 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 ...

1 year 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.

1 year 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.

1 year ago | 0

Converting third dimension of 3D matrix to 1xN object
struct(ii).Image = A(:,:,ii);

1 year ago | 0

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)); ...

1 year 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);

1 year 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...

1 year ago | 0

i want code to convert image to text
You can use deep learning networks from the neural networks toolbox: nnet = alexnet; % Load pretrain...

2 years ago | 0

interpolating Sample data to finer increment
Vq = interp2(X,Y',Weights, -17.5:0.5:17.5, (-15:0.25:15)');

2 years ago | 0

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How to set the y-axis values to be only integers?
plot(x) a = axis; axis([a(1) a(2) 0 4]); set(gca, 'YTick', 0:4)

2 years ago | 1

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what is the difference between double and im2 double?
im2double converts to double and rescales the image to [0, 1].

2 years ago | 1

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Finding out values for elements of an array from corresponding array elements?
You can represent your weights as a matrix using NaN for the diagonal elements that do not exist: Weights = [NaN, 0.79,0.31...

2 years ago | 0

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