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Drift correction for geochemical data
First, plot the data — fiji = readmatrix('fiji.csv') Col1 = fiji(:,1) Col4 = fiji(:,4) % d4d1 = gradient(fiji(:,4)) ./ gr...

3 years ago | 0

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Answered
How to Remove the baseline wander from ECG?
I recognise my code, however that version was not intended to work with a signal such as yours. Try this instead — load sig...

3 years ago | 0

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Three different graph on the same figure
I am not certain from your description what you want. The subplot, tiledlayout and stackedplot functions may be appropriate. ...

3 years ago | 0

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subplot with 1 large and 2 small figures
Perhaps something like this — x = 0:0.01:6.2; figure subplot(2,2,[1 2]) plot(x, sin(2*pi*4*x)) subplot(2,2,3) plot(x, c...

3 years ago | 2

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Answered
Create waterfall with separated curve
Perhaps something like this — X = 0:555; Y = 1:8; Z = X(:)*Y*1E-2 + randn(numel(X),numel(Y)); figure waterfall(X,Y,Z.') ...

3 years ago | 0

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Answered
Help with "Error using / Matrix dimensions must agree."
Use element-wise division, so (./) instead of (/) — Air_desnity=[0.646:0.01:1.225]; W_412_MTOW=5534; A_412=153.93804; Power...

3 years ago | 0

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Answered
Calculate RR from ECG signals
A somewhat more direct approach — EKG = readmatrix('ecg.txt'); L = numel(EKG) Fs = 500; ...

3 years ago | 1

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accessing subplot grid title (sgtitle) from figure properties
The sgtitle object is a child of the figure. The problem is that it doesn’t appear straightforward to access using findobj. ...

3 years ago | 1

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Answered
Fill the space between y-axis and curve with colours
It would be easiest to produce a series of patch plots for this, especially since the colours have to alternate. Example — ...

3 years ago | 0

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Answered
Find the first matched string/value from a table
One approach — VN = {'StepNum' 'Activity' 'TypeNum'}; step = [5098 5099 5101 5105 5106 5107 5113 ...

3 years ago | 0

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How to format individual elements in a timeseries
The various table arrays inherit their formats from the existing format. The only way to force a specific format is to write th...

3 years ago | 0

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Frequency response using input and output parameters only.
What data are you starting with, and what do you want to do with them? If you want to identify the system, see the documentat...

3 years ago | 0

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Plot data from txt file
If you simply want to aggregate the data in each second and plot them that way, try something like this — Uzp = unzip('Data 2....

3 years ago | 0

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Answered
How to change a variable name without changing the value itself?
Save them as elements of a cell array instead, when you first create them.

3 years ago | 2

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How can I distinguish from an unfiltered signal an eeg signal from an emg one?
Plotting is straightforward — LD = load('sigtest230504.mat'); s = LD.sig; L = numel(s); Fs = 1E+3; t = linspace(0, L-1, L)...

3 years ago | 0

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Answered
The FFT plot does not shows up, it is empty
Perhaps: data(isinf(data)) = NaN; data = fillmissing(data, 'linear'); since there may be a NaN or Inf value in ‘data’ that i...

3 years ago | 1

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Unable to solve the collocation equations -- a singular Jacobian encountered.
Your ‘odefcn’ has a divide-by-zero somewhere, since at x=0, ‘Y(2)’ is NaN, and setting ‘x’ to something greater than 0 ‘Y(2)’ is...

3 years ago | 0

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use readtable and wrong data
Perhaps: T = readtable('Predator_Setting.xlsx','Range','A1:B54', 'VariableNamingRule','preserve') Eartlier versions of readta...

3 years ago | 1

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Answered
Deleting spikes and reconstructing background noise
While it is possible to replace the spikes with broadband noise, here I just replaced them with a short sine segment — LD1 = l...

3 years ago | 0

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Extract values from a fig file?
Try this — F = openfig('Example.fig'); % Load File & Display Contents Ax = gca; ...

3 years ago | 0

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xticks and yticks with decimal exponents
Use the compose function to create a separate set of tick labels — % My attemot plot(10^(0):10^(3),10^(-8):10^(3)) set(gca, ...

3 years ago | 1

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Answered
How to calculate 50% and 66% width of each peak in the data?
Try this — LD = load('matlab.mat'); data = LD.filteredData.'; L = numel(data) Fs = 1000; x = linspace(0, L-1, L).'/Fs; ...

3 years ago | 0

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How to fill the area under the curve ?
I am not certain what result you want with respect to ‘under the plotted curves’. Adjusting that limit (defined here as ‘min(Da...

3 years ago | 0

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HOW TO FFT A NOISY EARTHQUAKE DATA
@Mary Claire — The problem with your data is that they are really noisy (that appears to be thermal or noise) that probably ori...

3 years ago | 1

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HP Filter array size problems in Matlab 2023a
It would help to have the data and the code. There are likely version differences, specifically that the arguments to the mld...

3 years ago | 0

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Storing numbers with lots of decimal places in arrays
Lacking detail as to what the analysis script does or what (if anything) it needs as input, I would put any input variables in a...

3 years ago | 0

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i am an electronics student and trying the program for designing the FIR Filter in matlab. i am using the hamming function but it shows error.tried reinstalling same problem%P
The arguments to the MATLAB window functions (all of them) must be integers greater than zero, and ‘n1’ is -61. That is obvious...

3 years ago | 0

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How to draw a picture in matlab as below:
That resembles a surfc plot. The contour normally only shows the contour llines, however setting the 'FaceColor' to 'flat' (fro...

3 years ago | 2

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Specifically find the first substantial peak in a graph.
Perhaps something like this — x = linspace(1.3, 3.3)*1E+4; yfcn = @(x) x.*exp(-0.00025*x); y = yfcn(x-x(1))/6 + [zeros(1,13)...

3 years ago | 0

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I need data points from Labchart file according to stimulus time points in a other channel , how can i get it?
Your data initially appeared to be chaotic when I plotted them, so I took a closer look and found that most of them aere arrange...

3 years ago | 1