# Jonas

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**Content Feed**

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

| accepted

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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answersHow 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

| accepted

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

| accepted

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

Subtracting a value from a table column

small example: % table with Var1 and Var2 a=table((1:1000)',(2001:3000)'); a.Var1(a.Var1>360)=a.Var1(a.Var1>360)-360

21 days ago | 0

How do you select elements of one cell array based on the contents of another cell array?

lower your aim value by half your error interval and half your error interval -> 0.250-(0.02/2)+0.02/2 & 0.250-(0.02/2)-0.02/2

21 days ago | 0