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Removing Error Data from Table
This is definitely an interesting problem, and one I have thought about at other times. I am not certain that I have complete...

2 years ago | 0

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Making an irregular cylinder using surface plotting
Here is one approach — S = rand(60,12); S = S.*((0:59).*exp(-0.1*(0:59))).'; figure surf(S) colormap(turbo) axis('equal...

2 years ago | 0

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Voltage find maximum of data
Try this — Table_1 = readtable('noise.txt'); Table_1.Properties.VariableNames = {'Time','Voltage'}; %Filter Filtered_Vol...

2 years ago | 0

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Smooth 2D colormap based on non-evenly distributed data
I am not certain that I understand what result you want. Try this — data = readmatrix('Data.txt'); figure scatter3(data...

2 years ago | 0

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Discrete filter bode shows wrong results
The fault, if there is one, is in not understanding the Control System Toolbox conventions. Addition creates a system with the ...

2 years ago | 0

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two versions of filter response
The only ones that I am aware of are the time domain response (showing both the unfiltered and filtered versions of the input si...

2 years ago | 0

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griddedInterpolant error "Interpolation requires at least two sample points for each grid dimension."
The interpn function could be an option. You will need to experiment with the ndgrid function to determine how best to reshape ...

2 years ago | 0

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power of 10 problem
‘... values of for example pressure were imported as text and not as number’ Use the str2double function to convert them to n...

2 years ago | 0

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How do I open .bin file and transform data to .txt file
A ‘4-byte float’ is probably 'float32' (possibly 'real*4'), so one of those should work for the ‘precision’ argument in fread. ...

2 years ago | 0

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12 Lead ECG Problem
See Detecting QRS complex in ECG signal and how can I get cardioid graph from ecg QRS complex? for representative examples.

2 years ago | 0

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Unrecognized function or variable 'knnimpute'
If you installed the Toolboxes using the installer, MATLAB should be able to access them. Your posted code works here — dat...

2 years ago | 0

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How do I find the minimum between a matrix and a varying matrix function? I get "Error in fmincon (line 563) initVals.f = feval(funfcn{3},X,varargin{:});"
There is one typo (. where _ should be) in: eps_dried = eps_dried.I3.epsilon; so change that to: eps_dried = eps_dried.I3_e...

2 years ago | 1

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How to get data points from graph
Getting information from .fig files has changed over the years. This approach works with the most recent releases. Use the f...

2 years ago | 0

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unsupervised thresholding of signal amplitudes: MLE?
I encourage you to investigate the ‘prominence’ values of the peaks. This is not a straightforward concept to define (see the f...

2 years ago | 0

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How to set up a plot with labels but no Y-axis tick marks
Perhaps this — figure boxchart(rand(10)) yt = yticks; yline(yticks, '-k', 'Color',[1 1 1]*0.25) Ax = gca; Ax.YAxis.Visibl...

2 years ago | 0

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How can I obtain the difference between two data stored in workspace?
If the two variables have the same number of elements, just subtract one from the other. For example: speed_error = refere...

2 years ago | 0

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How to find the frequency and amplitude of an oscillating signal?
One approach — T1 = readtable('book1.xlsx', 'VariableNamingRule','preserve') VN = T1.Properties.VariableNames; t = T1{:,1}; ...

2 years ago | 0

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How can I solve this datetick error?
The datetick function uses MATLAB datenum values to calculate and plot the dates and times. A much simpler approach uis to us...

2 years ago | 0

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Using fit, which coefficients should I extract to assess differences?
Only ‘c’ and ‘d’ are signifiantly different from zero, since the confidence limits of ‘a’ and ‘b’ include zero (the confidence l...

2 years ago | 0

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How the increase the affect of lowpass filter on a field data?
The cutoff frequency of the lowpass filter is too high. Try these — LD = load('T35.mat'); T35 = LD.T35; sampling_interval...

2 years ago | 1

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Answered
How can I use various colors to fill the area under a normal distribution curve?
Sure! Try this — x = linspace(1.5, 5, 250); mu = 3.3; s = 0.6; y = normpdf(x, mu, s); figure plot(x, y) hold on Lv...

2 years ago | 1

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problem of using findpeaks
My guess is that the datetime values are not considered to be monotonically increasing because they span multiple years. Try ...

2 years ago | 1

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how to open .fdt file
Searching the Interweb (with DuckDuckGo), I found 15.1 How to load EEGLAB .set and .fdt files without using EEGLAB (05/09/2020 u...

2 years ago | 1

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Answered
How to find duration of peaks/valleys in chart
Try this — T1 = readtable('NV1-9999.csv', 'VariableNamingRule','preserve') VN = T1.Properties.VariableNames; x = T1{:,1}; ...

2 years ago | 1

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What is the function to use to blacken a region?
Perhaps this — % clear %% Plotting the graphs % We have p(x) = 16 => p(x) - 16 = 0 f = @(x) (800000 .* exp(-x./5000)) ./ (x...

2 years ago | 0

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why is this not outputting the correct values
There is a syntax error, in that you used a colon operator ‘:’ instead of a comma in the ‘pythtrips’ references. The syntax is ...

2 years ago | 0

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Creating an equation with 2 unknowns with Curve Fitting
The question is a bit ambiguous. I do not see where curve fitting (actually parameter estimation) enters into it, because I do ...

2 years ago | 0

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Como resolver esta ecuacion
Is there a problem? This works — % Parámetros del sistema m = 45; % masa c = 64; % coeficiente de amortiguamiento k =...

2 years ago | 0

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save a figure in a predefined folder as variable using print
Using the fullfile function may help. You have to supply the necessary information, however fullfile will build the path.

2 years ago | 0

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Answered
How to plot specified data points on a polar plot with curved lines, instead of straight lines
I am not certain what result you want. The plot image you posted looks like a sort of spline fit, however when I tried a spline...

2 years ago | 0