Answered

FFT plotting trouble: Concatenated inputs

hello when you do modal analysis / FRF measurements with a hammer , you should split the record into individual hit input and ...

FFT plotting trouble: Concatenated inputs

hello when you do modal analysis / FRF measurements with a hammer , you should split the record into individual hit input and ...

3 months ago | 0

| accepted

Answered

interpolation of a sinusoidal tunnel data

hello again so I looked a bit some of your data , and my first question would be , why not first plot your (scattered) data wit...

interpolation of a sinusoidal tunnel data

hello again so I looked a bit some of your data , and my first question would be , why not first plot your (scattered) data wit...

3 months ago | 0

Answered

Frequency response of a system operating at a fixed frequency

hello we could use the general fft approach , but you could also use the stepped sine identification method. We only need to g...

Frequency response of a system operating at a fixed frequency

hello we could use the general fft approach , but you could also use the stepped sine identification method. We only need to g...

3 months ago | 1

| accepted

Answered

create a 3D smoothing with csaps (or similar)

hello again ! as your post title is about smoothing, this is what I propose , based on the fex submission : smoothn - File E...

create a 3D smoothing with csaps (or similar)

hello again ! as your post title is about smoothing, this is what I propose , based on the fex submission : smoothn - File E...

4 months ago | 0

| accepted

Answered

3D plot matrices

hello maybe this ? M100 = [19.8 29.305 38.425 48.37; 4.9 7.4 10.0 13.65]; M300 = [19.35 31.25 40.05 50.55; 7.6 12.65 16.65 ...

3D plot matrices

hello maybe this ? M100 = [19.8 29.305 38.425 48.37; 4.9 7.4 10.0 13.65]; M300 = [19.35 31.25 40.05 50.55; 7.6 12.65 16.65 ...

4 months ago | 0

| accepted

Answered

Calculating Surface Curvature from Image Data

hello I think this is because your K array contains some high amplitude spikes that avoid you see the smaller amplitude signal...

Calculating Surface Curvature from Image Data

hello I think this is because your K array contains some high amplitude spikes that avoid you see the smaller amplitude signal...

4 months ago | 1

| accepted

Answered

How to Generate Smooth Transitional Trapezoidal Signal in Simulink

hello whatever code you use to create the trapezoidal wave , you can simply then smooth it out, for example with smoothdata t...

How to Generate Smooth Transitional Trapezoidal Signal in Simulink

hello whatever code you use to create the trapezoidal wave , you can simply then smooth it out, for example with smoothdata t...

4 months ago | 1

| accepted

Answered

Pulstran function to generate biphasic pulses

hello have to admit I almost never used pulstran yet , so I simply prefer to come back to a very simple solution with repmat i...

Pulstran function to generate biphasic pulses

hello have to admit I almost never used pulstran yet , so I simply prefer to come back to a very simple solution with repmat i...

4 months ago | 0

Answered

How to plot isosurfaces using 3 vector columns of data?

maybe this ? pretty much what you could obtain with contour (in principe ,but I am not sure how to make contour work on your d...

How to plot isosurfaces using 3 vector columns of data?

maybe this ? pretty much what you could obtain with contour (in principe ,but I am not sure how to make contour work on your d...

4 months ago | 1

| accepted

Answered

Complex value computed by model function, fitting cannot continue. Try using or tightening upper and lower bounds on coefficients.

hello a very basic code using only fminsearch (no toolbox required ) I preferred to smooth a bit your data (otherwise it loo...

Complex value computed by model function, fitting cannot continue. Try using or tightening upper and lower bounds on coefficients.

hello a very basic code using only fminsearch (no toolbox required ) I preferred to smooth a bit your data (otherwise it loo...

4 months ago | 0

Answered

create a 3D average curve from two 3D curves

hello Alberto and welcome back we need to sort and remove duplictes in your data before creating a common z vector, then inter...

create a 3D average curve from two 3D curves

hello Alberto and welcome back we need to sort and remove duplictes in your data before creating a common z vector, then inter...

4 months ago | 0

| accepted

Answered

Workspace sorting order of new desktop

hello maybe a stupid idea but , if that solves the problem until you find a better solution, why not ? I first thought that ...

Workspace sorting order of new desktop

hello maybe a stupid idea but , if that solves the problem until you find a better solution, why not ? I first thought that ...

4 months ago | 0

Answered

How do I stitch these data and get a final plot

hello maybe this ? clear all S=readmatrix ('Probe.txt'); T=S(:,[2,3]); i=0; for j=0:60:300 R=[cos(j) -s...

How do I stitch these data and get a final plot

hello maybe this ? clear all S=readmatrix ('Probe.txt'); T=S(:,[2,3]); i=0; for j=0:60:300 R=[cos(j) -s...

4 months ago | 0

Answered

How to use the attached excel file below to do a Fourier conversion and display the spectrogram?

hello you can use my "do it all" demo file below your signal has been detrended and downsampled . But I wonder what you can ...

How to use the attached excel file below to do a Fourier conversion and display the spectrogram?

hello you can use my "do it all" demo file below your signal has been detrended and downsampled . But I wonder what you can ...

4 months ago | 1

| accepted

Answered

Converting acceleration data to displacement data using FFT results in Zero-drift

FYI, a very simple time domain approach - assuming we don't care about the DC values , only the dynamic portion of the data is o...

Converting acceleration data to displacement data using FFT results in Zero-drift

FYI, a very simple time domain approach - assuming we don't care about the DC values , only the dynamic portion of the data is o...

4 months ago | 1

Answered

I Just Want To Read Text From URL And Save It As Txt.... But How?

hello try this textweb = webread("https://kp.gfz-potsdam.de/kpdata?startdate=2024-05-21&enddate=2024-05-26&format=kp1#kpdata...

I Just Want To Read Text From URL And Save It As Txt.... But How?

hello try this textweb = webread("https://kp.gfz-potsdam.de/kpdata?startdate=2024-05-21&enddate=2024-05-26&format=kp1#kpdata...

4 months ago | 2

| accepted

Answered

To plot one stem with multiple values for data of different months.

hello @Amjad Iqbal I modified a bit your code added one line in the first for loop number_of_data_thismonth(k) = numel(...

To plot one stem with multiple values for data of different months.

hello @Amjad Iqbal I modified a bit your code added one line in the first for loop number_of_data_thismonth(k) = numel(...

4 months ago | 0

Answered

Find specific points of increase within multiple different data sets

hello try this... hope it helps - though I did not draw vertical lines but you have to start and ending points coordinates. I...

Find specific points of increase within multiple different data sets

hello try this... hope it helps - though I did not draw vertical lines but you have to start and ending points coordinates. I...

4 months ago | 0

| accepted

Answered

Need help for Influence line plotting

hello I believe there is no mistake in the code simply you have a fairly crude spatial resolution (fixed to 0.5 m in the cod...

Need help for Influence line plotting

hello I believe there is no mistake in the code simply you have a fairly crude spatial resolution (fixed to 0.5 m in the cod...

4 months ago | 0

| accepted

Answered

is my code logically correct? will i get the same output when i do it manually?

hello I wondered if the exercise was more to prove that decimating then resampling (by the same factor) would give (almost) th...

is my code logically correct? will i get the same output when i do it manually?

hello I wondered if the exercise was more to prove that decimating then resampling (by the same factor) would give (almost) th...

4 months ago | 0

Answered

First Order Ogden Stress Strain Plot

hello I believe parentheses are missing for the last term % Stress calculation for compression stress_comp = (mu1/alpha1) *...

First Order Ogden Stress Strain Plot

hello I believe parentheses are missing for the last term % Stress calculation for compression stress_comp = (mu1/alpha1) *...

4 months ago | 0

Answered

Mean shift clustering - issue with finding the center of my clusters

Now probably my best contribution so far , and I post it here with maybe the hope that you will find it interesting enough to ac...

Mean shift clustering - issue with finding the center of my clusters

Now probably my best contribution so far , and I post it here with maybe the hope that you will find it interesting enough to ac...

4 months ago | 1

Answered

how to count a sequence of data arrays with cut off?

hello why not simply this ? % example 1 cnr_all=[2.33 2.00 1.60 1.59 1.99]; cut_off=1.50; [~,N] = min(cnr_all - cut_o...

how to count a sequence of data arrays with cut off?

hello why not simply this ? % example 1 cnr_all=[2.33 2.00 1.60 1.59 1.99]; cut_off=1.50; [~,N] = min(cnr_all - cut_o...

4 months ago | 1

Answered

graph multiple excel or csv files

hello try this if you have lot of excel files and you want to be sure they are sorted correctly (what the regular dir does ...

graph multiple excel or csv files

hello try this if you have lot of excel files and you want to be sure they are sorted correctly (what the regular dir does ...

4 months ago | 0

Answered

Find minimum values based on unique number

hello the provided mat file contains 492 different profiles (and not 147) my suggestion so far : load('matlab.mat') pr...

Find minimum values based on unique number

hello the provided mat file contains 492 different profiles (and not 147) my suggestion so far : load('matlab.mat') pr...

4 months ago | 0

| accepted

Answered

Translate and rotate a curve

hello Mads like this ? load('pqfile.MAT') % remove NaN and correct for size mismatch A(isnan(A)) = []; F(isnan(F)) = []...

Translate and rotate a curve

hello Mads like this ? load('pqfile.MAT') % remove NaN and correct for size mismatch A(isnan(A)) = []; F(isnan(F)) = []...

4 months ago | 0

| accepted

Answered

Subtractive Baseline-correction

hello I was first a bit puzzled when you mention the baseline is made of the first 10 samples - but after several readings it ...

Subtractive Baseline-correction

hello I was first a bit puzzled when you mention the baseline is made of the first 10 samples - but after several readings it ...

4 months ago | 0

| accepted

Answered

how to delete nan values from array columns without losing data from other columns

ok, so this is now the main dishes.... have first tried this code on the first data file , will adapt to your new files as soo...

how to delete nan values from array columns without losing data from other columns

ok, so this is now the main dishes.... have first tried this code on the first data file , will adapt to your new files as soo...

4 months ago | 0

| accepted

Answered

Mean shift clustering - issue with finding the center of my clusters

hello Marco seems that your issue is simply because the function works for row oriented data see those lines in MeanShiftClus...

Mean shift clustering - issue with finding the center of my clusters

hello Marco seems that your issue is simply because the function works for row oriented data see those lines in MeanShiftClus...

4 months ago | 1

Answered

autocorrelation plot without the grid of lines

hello you can remove the grid by specifying grid off after the plot Mdl = arima(AR={0.75,0.15},SAR={0.9,-0.5,0.5}, ... ...

autocorrelation plot without the grid of lines

hello you can remove the grid by specifying grid off after the plot Mdl = arima(AR={0.75,0.15},SAR={0.9,-0.5,0.5}, ... ...

4 months ago | 0

| accepted