Community Profile # Jonas

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Funding a way to describe a curve in x y coordinates
you can use [rows,cols] = find(...) to get the corrdinates of your points. if you want to plot a shape you may have a look into...

15 hours ago | 0

calculating weighted sum of values in a matrix
short example for the weighting: each number is multiplied by its column index and row index in=ones(3,2); [X,Y]=meshgrid(1:si...

16 hours ago | 0

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Question

Parameters for room impulse response measurements using swept sine
hi all, I want to do get a rough idea of the acoustical impulse response of a room. This room is used by a choir and and I just...

16 hours ago | 0 answers | 0

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How to chose the correct line style?
looks like you have to add a marker to your plot atcommand, then you do not only have lines but also markers during and the end...

7 days ago | 0

How to adjust the view of colorbar to be the same as contourf
try that adding the colors to the image and add artificial labels using text close all; x = 100*rand(100,100); contourf(x,'Li...

8 days ago | 1

Variables Calculated in Function Somehow Aren't Assigned to Output
looks like your two if statements are never fullfilled, thats why output variables are empty

8 days ago | 1

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confusion during finding out the mean of a 3d vector
the short answer: your second approach takes mean values of means and the first approach takes the mean value of all elements

8 days ago | 0

How to export coefficients of IIR filter from Filter Designer Tool?
go to Edit -> Convert to single section and then you can export them as numerator and denumerator

8 days ago | 0

To compare to matrices element by element
you can compare matrix A and B directly using typical comparing operators A<B if the question is if there is any element of A ...

8 days ago | 0

How to create a loop until the condition is met?
add the follwing at the beginning infLoop=1; while infLoop infLoop=0; % your code and that to the end o...

8 days ago | 0

How to convert images as array to images and save them in folder
for a matrix A with ynum images in y direction and xnum images in x direction with size height x width you can use C = mat2...

8 days ago | 0

Error scaling x-axis in Matlab?
your neural.Time variable is of type duration, then your xlim values have to be type duration too i guess

9 days ago | 0

Percentage change in the Y axix for unit change in X axis
if you have y data along x you can calculate diff(y)./diff(x) to get the derivate. to get the pointswise percentage value divide...

9 days ago | 0

need help making a 'for' loop to make a new matrix
your loop calculates the maximum value of a character array. since the character 'm' has value 109 (see double('m')) and your ch...

9 days ago | 1

How to assign error bars to a multiple data sets histogram ?
use myBars=bar(1:6,Comparaison); this will give you a 1x2 bar in the variable myBars in this case. One bar object holds ...

10 days ago | 1

Could anyone help me how to find the difference between the two columns in 10x2 double
use diff(A{1,1},1,2) to get all first order differences between columns for every row

11 days ago | 0

i want to make comparison between two matrices elements after creating the two matrices.
you have access to cell entries e.g. by using x{1}(2,3); if your matrices have all the same size i would suggest saving them in...

12 days ago | 0

How to set values to NaN when they AREN'T within the given indices
a=ones(3); [X,Y]=meshgrid(1:3); a(~(X==3 & Y==3))=NaN; which equals a(X~=3 | Y~=3)=NaN;

12 days ago | 0

Delete/remove entire rows and columns containing an element that satisfies a condition (e.g. when the element is an imaginary number)
where=yourMatrix==yourCondition; yourMatrix(any(where,2),:)=[]; yourMatrix(:,any(where,1))=[]; or [row,col]=...

12 days ago | 1

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What does this mean "No differences to display. The files are not identical, but the only differences are in end-of-line characters."
it's about on how the new line is stored. there are differences between different operating systems (OS). you can read more abou...

13 days ago | 0

how to add a STAR or Triangle shape to plot simply without knowing their vertex?
smth. like that probably Z = peaks; contourf(Z); hold on; plot(15,10,'rp','MarkerSize',15,'MarkerFaceColor','r') al...

13 days ago | 1

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Producing all combinations of a vector with replacement
you could e.g. use nchoosek(repelem(1:3,2),2) but then you whould have to use unique(...,'rows') on the resulting combin...

15 days ago | 1

How to add a second x-axis on top in plot?
<https://de.mathworks.com/matlabcentral/fileexchange/317-plotxx-m this> may be the function you are searching for

16 days ago | 0

How can I resample 3051.7578Hz data in 1000Hz?
use the interp1() function, it can also deal with non uniformly sampled data

16 days ago | 0

can anyone explain how to do this
so if you put 8kg on the spring it moves 175mm down and does not move further. this means there is a force equlibrium between th...

18 days ago | 0

time scaling, how to remove fraction in the below code? or give another code for discrete x[0.5n] ?
if you want x[0.5n] you have to calculate n1=1/0.5 * n

19 days ago | 0

Trying to use retime to sum daily values, but I don't want days that only have NaN values to become 0
weird, the normal behavior of sum is giving NaN if at least one of the summed values is NaN. try @sum instead of 'sum' and if th...

19 days ago | 0

How to shift all the pixels position by a specific function and recreate the image of shifted pixel values?
for the shifting have a look into circshift() which allows you to shift all elements by specific amounts along x and y. for t...

20 days ago | 0