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Nik Rocky


Last seen: 2 months ago |  Active since 2020

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Looking Assistance for Data Acquisition and Parallel Processing with USRP B200 in MATLAB
Hello dear MATLAB Community, I am looking for a solution to receive and save data from the USRP B200 using the USRP Communicati...

1 year ago | 0 answers | 0

0

answers

Answered
I am getting the error message "Device discovery error: input stream error"
The errors: [ERROR] [UHD] Device discovery error: receive_from: An existing connection was forcibly closed by the remote host [...

1 year ago | 0

Question


Preallocating and filling long array with shorter arrays
Hello dear community, I have a question: If I want to fll an array with single values using preallocation, I do: input = zero...

1 year ago | 1 answer | 0

1

answer

Question


Store matrixes with variable dimensions to stereo WAVE files
Hello dear experts, I want to write IQ data from radio to stereo wav-File (use WAVE like datacontainer). So I (real part) to o...

2 years ago | 0 answers | 0

0

answers

Answered
How to store complex double data to WAV?
I found a solution by spliting to real ang imag, save it in two different wav-files. % split data to real and imag data_I = ...

2 years ago | 0

Question


How to store complex double data to WAV?
Hello together, I receive IQ data (real and imaginary values) from radio and save it to variable "IQ_data_before_write". The...

2 years ago | 1 answer | 0

1

answer

Question


Why do I get additional frequencies using standard audiowrite BitsPerSample values?
Hello, I want to write spectral data to wav file and read it again. If I do some example with two sine waves, after writing+...

2 years ago | 1 answer | 0

1

answer

Question


How to display data saved with getSpectrumData? Why are saved values different from input?
Hello dear community, in my example code I create two sinus signals, display it with spectrumAnalyzer and save data to tables ...

2 years ago | 0 answers | 0

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answers

Answered
"Invalid MEX-file" error while setup of "Communications Toolbox Support Package for USRP Radio" Add-on
Hello, I solve a Problem. Uninstall UHD package Open Dependency Walker inside of MATLAB: ! D:\path\to\dependencywalker\de...

2 years ago | 1

| accepted

Question


"Invalid MEX-file" error while setup of "Communications Toolbox Support Package for USRP Radio" Add-on
Hello all, I want to use my Ettus research USRP B210 with Communications Toolbox Support Package for USRP Radio Addon. Whil...

2 years ago | 3 answers | 2

3

answers

Question


Compare values in two matrix with different length by time in first row
Hello, I have one aim to do comparison of values in two matrices without using for loops (array are huge). I show you exampl...

4 years ago | 1 answer | 0

1

answer

Question


Convert cell array to matrix with two columns and sort rows by first column value
Hello, I have a large Cell array with multiple cells. Every these cells has n-rows and two columns. I want to convert this ce...

4 years ago | 2 answers | 0

2

answers

Question


How to remove outliers without using filter?
Hello, I have a measure results and there are some random outliers with a big negative or positive values (jitter of uC), ther...

4 years ago | 1 answer | 0

1

answer

Question


Shift array to left or right, keep length and feel zero empty area
Hello, I have an array: A = [1 2 3 4 5 6 7 8 9]; I want create B array from A B = [0 0 1 2 3 4 5 6 7]; or B = [3 4 5 6 7...

4 years ago | 3 answers | 0

3

answers

Answered
Change output resolution by export_fig
I found it: export_fig('-m3', Full_Plot_Path_Name)

4 years ago | 0

| accepted

Question


Change output resolution by export_fig
Hello, I'm trying to save my diagrams with png higher resolution, but I can't find a right code. My output looks so: expor...

4 years ago | 2 answers | 0

2

answers

Question


Optimizing for loops by searching some data in cell arrays
Hello, I'm searching in multiple cell-array for some data: for traj_cnt = 1:size(Traj_interpl,2) %for every Traj-Cell ...

4 years ago | 1 answer | 0

1

answer

Question


load multiple files in right order
Hello, I'm loading multiple mat-files in workspace, the names of files are: Schweben_Meg_2_2-01_SNR_-030_PLL.mat Schweben_Meg...

4 years ago | 1 answer | 0

1

answer

Answered
wrong number of rows of cell array using length()-function
If i want to build it in my for-loop, what is the nice way to do it? Old part of code for traj_cnt = 1:length(Traj_interpl) ...

4 years ago | 0

Question


wrong number of rows of cell array using length()-function
Hello dear community, I get some error by using length in one Cell-Array on Traj_interpl{1,209}: for traj_cnt = 1:length(Traj_...

4 years ago | 4 answers | 0

4

answers

Question


How to avoid statistical outliers under special speed (acceleration and deceleration)
Hello dear community, I use and plot some measure data (rotating speed of 4 motors). The measures work great up to speed of 30-...

4 years ago | 1 answer | 0

1

answer

Question


change text colour in foreground of line plot
Hello, how can I change text color above line plot? It is possible? Its not about changin whole text color, its about just th...

4 years ago | 2 answers | 0

2

answers

Question


Difference between errorbar and errorbarxy (function)
Hello, I'm calculating and plotting a mean-Values and standard deviation: If I plot it via errorbar, I get: .... errorbar(M1...

4 years ago | 1 answer | 0

1

answer

Question


Better way to display lablepoints in ROC-Curve
Hello, next to data plot I print lablepoint with SNR-values. How can I display it nicer, maybe to change a label order, or colo...

4 years ago | 0 answers | 0

0

answers

Question


Lablepoints create name with variable
Hello, simple question: SNR = -30 -15 0 15 30 I want: SNR_Name = 'SNR = -30' 'SNR = -15'...... to put ...

4 years ago | 1 answer | 0

1

answer

Answered
Standard deviation values are to big
Oh, mea culpa - I see, standard deviation bars are not wrong - the results from different measures are really far away from each...

4 years ago | 0

Question


Standard deviation values are to big
Hello, the measures on first pic is a dataset: later. I change my script and now I create a mean values (between groups 0.5m...

4 years ago | 1 answer | 0

1

answer

Question


save matrix in loop to 3D matrix (storage all inkomming matrix)
Hello, I read multiple .mat-files with matrix M x-y-axis (5x2doubles) and have to save it. I think, the better way is to create...

4 years ago | 1 answer | 0

1

answer

Question


Avoid lower case in legend by plotting legend with 'DisplayName'
Hello, I have again a similar Problem, but in this case I can't separate legend, and : 'Interpreter','none' is here also not w...

4 years ago | 2 answers | 0

2

answers

Question


Order of filenames is wrong
Hello, I have save some measures in loop with SNR = 30 SNR_steps = 15 -SNR:SNR_steps:SNR ans = -30 -15 0 15 3...

4 years ago | 1 answer | 0

1

answer

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