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Jonas


Last seen: Today Active since 2020

Programming Languages:
C++, Java, MATLAB
Spoken Languages:
English, French, German

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Answered
how to concatenate two tables efficiently
before concatenation you can go trough all tables and add up the number of rows. Then preallocate the table using three columns ...

5 hours ago | 0

Answered
let a script run in other script with variable parameters
it really sounds like you actally should change your script to a fcuntion. Running a script giving paramters to it is exactly wh...

2 days ago | 1

Answered
How to print value from Structure in MATLAB
you can access the 4 doubles in the cell StagPRFValue by e.g. CombineOutput(1).ValueStructure.StagPRFValue{1} the other two ...

2 days ago | 0

Answered
Interpolating points in a 3D space with one line
have a look into the polyfitn() function on FEX

2 days ago | 1

Answered
Call a function within an if statement
try randomtasks(n)==1 i guess without the (n) you would compare a vector to a value e.g. [1 3 2]==1 which is not true and th...

2 days ago | 0

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Answered
need help for understanding audio compression code using dct
it shows, how a sound could sound if you transmit only 128 dct values per block instead of 512 sound values per block % read au...

2 days ago | 0

Answered
How to plot the average wavelet magnitude over range of frequencies
why not use the output of the cwt function? you can average it yourself: load mtlb t=(0:numel(mtlb)-1)/Fs; [wt,f,coi]=cwt(m...

2 days ago | 0

Answered
Find the width of a peak
do you just want to measure the peak width of this data set only? if yes, i should be telatively easy locating the peak with min...

3 days ago | 0

Answered
Resampling vector to have homogeneous length between trials
you can use the interp1() function to produce an equal number of samples per jump

5 days ago | 0

Answered
how to clean data by deleting [0 0]
use rowsToDelete=~any(AB,2); or rowsToDelete=all(~AB,2); AB(rowsToDelete,:)=[]; or rowsToKeep=any(AB,2); AB=AB(rowsToKeep...

6 days ago | 0

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Answered
Finding the max value in 1st column of values based on a range in the 2nd column of values
max(yourMat( yourMat(:,2)>0.09 && yourMat(:,2)<0.11 ,1)) for the first range and so on?

6 days ago | 0

Answered
Find rising and falling point
you can identify those points using a threshold for the differential signal, something like find( abs(diff(x)) > someThreshol...

6 days ago | 1

Answered
How can I get the mean data from under the graphs?
what about a general threshold like 10 here? mean(all_data(all_data>10))

6 days ago | 0

Answered
How can I study Autocorrelation function of common inputs?
you can simply generate your own vectors in matlab and do some studying e.g. rectPulse = [zeros(1,10) ones(1,15) zeros(1,10)];...

6 days ago | 0

Submitted


partially logarithmic plots
This function allows to plot with x or y axis divided into a logarithmic and linear part.

6 days ago | 2 downloads |

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Submitted


MRAW reader GUI with image enhacement and sub pixel tracking
Loads Photron mraw files, allows fluent preview, image-wise spectral filtering, binomial filtering and temporal median filtering...

6 days ago | 3 downloads |

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Answered
I need to change a graphic without using unwrap
you can unwrap manually. if you have data x and y myWrapThr=-150; dy=diff(y); dy(dy<myWrapThr)=dy(dy<myWrapT...

7 days ago | 0

Answered
define color range in scatter plot
i do not fully understand, you want to use the pallett for split to 0 to 3000, but at a certain threshold you want to use black ...

7 days ago | 0

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Answered
Fourier Transform of Seismic Waves
subtract the mean before fft to improve visibility of frequencies or use dB view by calculating 20*log10(P1) explanation: the...

8 days ago | 0

Answered
Plotted image is clear but saved image is blurry- why?
use png instead of jpg, then no compression is applied and the quality will stay good there ate several methods whichbaffect ...

8 days ago | 0

Answered
Why do certain images require imshow(imagename,[]). whereas others don't?
the answer loes within the variable class. the original inage is uint8 which can have values between 0 and 255, this means imsho...

9 days ago | 1

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Answered
Joining two columns and exporting to excel
use mat2cell before joining them! [mat2cell(A) mat2cell(B)]

11 days ago | 0

Answered
Double condition to find index
myData=...; fs=2000; minLength=ceil(fs*0.05); highVals=myData>20; searchFor=conv(highVals,ones(1,minLength),'s...

12 days ago | 0

Answered
Extracting multiple row values (with unequal range) in a column separately
dat=readmatrix('saf_wind.csv'); dat(dat==9999)=[]; whereIsNan=find(isnan(dat)); yourMeans=zeros(1,numel(whereIsNan)+1); for ...

13 days ago | 1

Question


Speeding up fread for random position in big file
dear community, at the moment i need to read one or multiple image(s) from a big data file. since I build a live data viewer an...

13 days ago | 3 answers | 0

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answers

Answered
I want to replace the hyphens with en dashes in a plot axes.
i suggest you have a look into the yticklabels() and xticklabels() and do some replacement of '-' with the en dash char(0x2013)....

14 days ago | 0

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Question


Results of math with integer
Dear community, I recently had to work with uint8 and did some simple calculations over it. I tought using integer math tells t...

14 days ago | 1 answer | 0

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answer

Answered
Al estar trabajando la grafica no aparece, se abre la ventana pero solo aparece la cuadricula sin ningun tipo de lineas
use RC./V instead of RC/V to divide element by element

15 days ago | 1

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Answered
Unit Step Funtion Without using heaviside function
you could go over the integration of the delta function, which is the heaviside function: t=-5:5; ds=[0 1 1 1 1 0 -1 -1 ...

15 days ago | 0

Answered
Frequency problem between reality and analysis
the nyquist theorem tells that you need to sample a wave at least two times to reproduce it without errors. Or in other words, i...

16 days ago | 0

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